From patchwork Thu Mar 21 15:47:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863875 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 947916C2 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 730B32A2C5 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 674502A311; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D629C2A307 for ; Thu, 21 Mar 2019 15:47:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728497AbfCUPrR (ORCPT ); Thu, 21 Mar 2019 11:47:17 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:52406 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728525AbfCUPrQ (ORCPT ); Thu, 21 Mar 2019 11:47:16 -0400 Received: by mail-wm1-f66.google.com with SMTP id a184so3283472wma.2 for ; Thu, 21 Mar 2019 08:47:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WzYI0MXO56en0+SaHSh0HOvk8L3Kp48n8+Ba5YN3xF0=; b=c3WRD+Ii8nXBExUH1aDmo8RtVNJQxocKfHsIfwK36A+BI1epl6MabUCKwDyCnsTQhU iZjGpS4VjY7dmOsKbVBJ8o7KKtQyD1HcczgQ27X86UV2dmsb9kbKkduKIqAVhAD6Ol6+ pemNPEIXObu24GLZnAvICSVx2B6WRZtKshvtkZlvNggJFFETEv4jJDrsJ6/9eLWAqWyc UgxxMz8sSDTUDCKsgHBW75EJAzBJMLgDNBCbX5O9Tcso89GyPD/xGYC5te3ZdXMLg5zY +GYkYH07B1i9GFxlI8OhLz7YOPUAwMiqHyrfOS7xtbRGBqjgM7JeR0awCev09oxCA9BH GRig== X-Gm-Message-State: APjAAAUK1ZLRa8EpyiHXc0ku9+5RvfDiO8OSbklTM8nl8V7U38DHRnkn D3BhssUDggcblGUL+V85XlY= X-Google-Smtp-Source: APXvYqy7D5hxCLh71BIGovU7goRsxRmsHtxIkWxcmdR4hAGq16R0FK0GpgZ4Jw870NX0ZwqHTjEm3Q== X-Received: by 2002:a1c:2283:: with SMTP id i125mr2972842wmi.24.1553183232688; Thu, 21 Mar 2019 08:47:12 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.11 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:11 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 1/9] trace-cmd: Implemented new lib API: tracecmd_local_events_system() Date: Thu, 21 Mar 2019 17:47:01 +0200 Message-Id: <20190321154709.24163-2-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The new tracecmd lib API tracecmd_local_events_system() creates a tep handler and initializes it with the events of the specified subsystems. Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 2 + lib/trace-cmd/trace-util.c | 95 ++++++++++++++++++++++++----------- 2 files changed, 67 insertions(+), 30 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 27ba89d..21f83e2 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -32,6 +32,8 @@ void tracecmd_unload_plugins(struct tep_plugin_list *list, struct tep_handle *pe char **tracecmd_event_systems(const char *tracing_dir); char **tracecmd_system_events(const char *tracing_dir, const char *system); struct tep_handle *tracecmd_local_events(const char *tracing_dir); +struct tep_handle *tracecmd_local_events_system(const char *tracing_dir, + const char * const *sys_names); int tracecmd_fill_local_events(const char *tracing_dir, struct tep_handle *pevent); char **tracecmd_local_plugins(const char *tracing_dir); diff --git a/lib/trace-cmd/trace-util.c b/lib/trace-cmd/trace-util.c index b5aea39..9cbd93b 100644 --- a/lib/trace-cmd/trace-util.c +++ b/lib/trace-cmd/trace-util.c @@ -1119,43 +1119,25 @@ static int read_header(struct tep_handle *pevent, const char *events_dir) return ret; } -/** - * tracecmd_local_events - create a pevent from the events on system - * @tracing_dir: The directory that contains the events. - * - * Returns a pevent structure that contains the pevents local to - * the system. - */ -struct tep_handle *tracecmd_local_events(const char *tracing_dir) +static bool contains(const char *name, const char * const *names) { - struct tep_handle *pevent = NULL; - - pevent = tep_alloc(); - if (!pevent) - return NULL; - - if (tracecmd_fill_local_events(tracing_dir, pevent)) { - tep_free(pevent); - pevent = NULL; - } - - return pevent; + if (!names) + return false; + for (; *names; names++) + if (strcmp(name, *names) == 0) + return true; + return false; } -/** - * tracecmd_fill_local_events - Fill a pevent with the events on system - * @tracing_dir: The directory that contains the events. - * @pevent: Allocated pevent which will be filled - * - * Returns whether the operation succeeded - */ -int tracecmd_fill_local_events(const char *tracing_dir, struct tep_handle *pevent) +static int tracecmd_fill_local_events_system(const char *tracing_dir, + struct tep_handle *pevent, + const char * const *sys_names) { + int ret, failure = 0; struct dirent *dent; char *events_dir; struct stat st; DIR *dir; - int ret, failure = 0; if (!tracing_dir) return -1; @@ -1189,7 +1171,8 @@ int tracecmd_fill_local_events(const char *tracing_dir, struct tep_handle *peven if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) continue; - + if (!contains(name, sys_names)) + continue; sys = append_file(events_dir, name); ret = stat(sys, &st); if (ret < 0 || !S_ISDIR(st.st_mode)) { @@ -1217,6 +1200,58 @@ int tracecmd_fill_local_events(const char *tracing_dir, struct tep_handle *peven return ret; } +/** + * tracecmd_local_events_system - create a tep from the events of the specified subsystem. + * + * @tracing_dir: The directory that contains the events. + * @sys_name: Array of system names, to load the events from. + * The last element from the array must be NULL + * + * Returns a tep structure that contains the tep local to + * the system. + */ +struct tep_handle *tracecmd_local_events_system(const char *tracing_dir, + const char * const *sys_names) +{ + struct tep_handle *tep = NULL; + + tep = tep_alloc(); + if (!tep) + return NULL; + + if (tracecmd_fill_local_events_system(tracing_dir, tep, sys_names)) { + tep_free(tep); + tep = NULL; + } + + return tep; +} + +/** + * tracecmd_local_events - create a pevent from the events on system + * @tracing_dir: The directory that contains the events. + * + * Returns a pevent structure that contains the pevents local to + * the system. + */ +struct tep_handle *tracecmd_local_events(const char *tracing_dir) +{ + return tracecmd_local_events_system(tracing_dir, NULL); +} + +/** + * tracecmd_fill_local_events - Fill a pevent with the events on system + * @tracing_dir: The directory that contains the events. + * @pevent: Allocated pevent which will be filled + * + * Returns whether the operation succeeded + */ +int tracecmd_fill_local_events(const char *tracing_dir, + struct tep_handle *pevent) +{ + return tracecmd_fill_local_events_system(tracing_dir, pevent, NULL); +} + /** * tracecmd_local_plugins - returns an array of available tracer plugins * @tracing_dir: The directory that contains the tracing directory From patchwork Thu Mar 21 15:47:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863881 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BB1FC1708 for ; Thu, 21 Mar 2019 15:47:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9FAEA2A307 for ; Thu, 21 Mar 2019 15:47:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9415E2A30A; Thu, 21 Mar 2019 15:47:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 039A62A2C0 for ; 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Thu, 21 Mar 2019 08:47:13 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:12 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 2/9] trace-cmd: Added support for negative time offsets in trace.dat file Date: Thu, 21 Mar 2019 17:47:02 +0200 Message-Id: <20190321154709.24163-3-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When synchronizing timestamps between different machines, there are cases when the time offset is negative. This patch changes the way time offset is written and read from trace.dat file - as signed decimal, instead of hex. Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 2 +- lib/trace-cmd/trace-input.c | 6 +++--- tracecmd/trace-read.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 21f83e2..428d792 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -126,7 +126,7 @@ int tracecmd_is_buffer_instance(struct tracecmd_input *handle); void tracecmd_create_top_instance(char *name); void tracecmd_remove_instances(void); -void tracecmd_set_ts_offset(struct tracecmd_input *handle, unsigned long long offset); +void tracecmd_set_ts_offset(struct tracecmd_input *handle, long long offset); void tracecmd_set_ts2secs(struct tracecmd_input *handle, unsigned long long hz); void tracecmd_print_events(struct tracecmd_input *handle, const char *regex); diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index 34a8301..be6720c 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -91,7 +91,7 @@ struct tracecmd_input { bool read_page; bool use_pipe; struct cpu_data *cpu_data; - unsigned long long ts_offset; + long long ts_offset; double ts2secs; char * cpustats; char * uname; @@ -2082,7 +2082,7 @@ static int init_cpu(struct tracecmd_input *handle, int cpu) } void tracecmd_set_ts_offset(struct tracecmd_input *handle, - unsigned long long offset) + long long offset) { handle->ts_offset = offset; } @@ -2099,7 +2099,7 @@ void tracecmd_set_ts2secs(struct tracecmd_input *handle, static int handle_options(struct tracecmd_input *handle) { - unsigned long long offset; + long long offset; unsigned short option; unsigned int size; char *cpustats = NULL; diff --git a/tracecmd/trace-read.c b/tracecmd/trace-read.c index 804022a..e309672 100644 --- a/tracecmd/trace-read.c +++ b/tracecmd/trace-read.c @@ -58,7 +58,7 @@ static struct list_head handle_list; struct input_files { struct list_head list; const char *file; - unsigned long long tsoffset; + long long tsoffset; unsigned long long ts2secs; }; static struct list_head input_files; @@ -1413,7 +1413,7 @@ void trace_report (int argc, char **argv) struct input_files *inputs; struct handle_list *handles; enum output_type otype; - unsigned long long tsoffset = 0; + long long tsoffset = 0; unsigned long long ts2secs = 0; unsigned long long ts2sc; int show_stat = 0; From patchwork Thu Mar 21 15:47:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863877 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CF2501708 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B53C62A2B8 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3C0B2A311; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 690EB2A2B8 for ; 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Thu, 21 Mar 2019 08:47:15 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.14 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:14 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 3/9] trace-cmd: Fix tracecmd_read_page_record() to read more than one event Date: Thu, 21 Mar 2019 17:47:03 +0200 Message-Id: <20190321154709.24163-4-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The kbuffer_next_event() will return the next event on the sub buffer. If we pass in the last_record to tracecmd_read_page_record(), it initializes the sub buffer, and by calling kbuffer_next_event() (instead of kbuffer_read_event()), the second event on the sub buffer is returned. This causes the match of the last_record not to match if the last_record happens to be the first event on the sub buffer. Signed-off-by: Tzvetomir Stoyanov --- lib/trace-cmd/trace-input.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index be6720c..0a6e820 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -1679,18 +1679,22 @@ tracecmd_read_page_record(struct tep_handle *pevent, void *page, int size, goto out_free; } - do { + ptr = kbuffer_read_event(kbuf, &ts); + while (ptr < last_record->data) { ptr = kbuffer_next_event(kbuf, NULL); if (!ptr) break; - } while (ptr < last_record->data); + if (ptr == last_record->data) + break; + } if (ptr != last_record->data) { warning("tracecmd_read_page_record: could not find last_record"); goto out_free; } - } + ptr = kbuffer_next_event(kbuf, &ts); + } else + ptr = kbuffer_read_event(kbuf, &ts); - ptr = kbuffer_read_event(kbuf, &ts); if (!ptr) goto out_free; From patchwork Thu Mar 21 15:47:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863879 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1152E1823 for ; Thu, 21 Mar 2019 15:47:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E8AC92A2B8 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E744C2A311; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 949622A307 for ; Thu, 21 Mar 2019 15:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728532AbfCUPrS (ORCPT ); Thu, 21 Mar 2019 11:47:18 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:38209 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728531AbfCUPrR (ORCPT ); Thu, 21 Mar 2019 11:47:17 -0400 Received: by mail-wm1-f65.google.com with SMTP id a188so3244092wmf.3 for ; Thu, 21 Mar 2019 08:47:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=KZrqIpIWaDsmqIPJyX90jfu7nox1DuIvSLjj1esD/k8=; b=KNYoPsavxp+jE6uXySHrKMxH5zR6Ji46mHVSUg126aExjL37mw2CvvXrOQxUO1DitS uBjJe3mMjbV57NT+/Br/6gNK/ibyxz77c8H7rSlnTRT08LXbzbl0u8zcDKpDDFwar0vG hwCOTL0s6RxbR5s/OU0o09WKRUuZLcnLwkbUSeUXGYSFLwTHoJZpiFkjQ+4VBPVizjMn gsjfYMWnB3L0TJ/EEvnrV+GxJweyzMgDqmBxQR5OVknKihVxQMbUYrrKJNQgrA2wa0ac wAoYJEt6fv+IuwtxVVbpJmwv8jQDbnXycoktbML9xI89C9rdNBVAysU1GN+V2AEnHP+i CItw== X-Gm-Message-State: APjAAAXiOlBJgOrhV/XYVBq5fawHqZstdq4uNfznXCda6d9gKlOYFDW3 h2yZqeGuM2ggC2+h+/Gq9W4E5rUv X-Google-Smtp-Source: APXvYqwCBCPeN44OFkAPXVJzHpBofs49jEMJQEYKMLEezuji3LfooVtZKpBbu/Un1SIrSMEHhQqKTw== X-Received: by 2002:a1c:1a46:: with SMTP id a67mr2833027wma.21.1553183236166; Thu, 21 Mar 2019 08:47:16 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:15 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 4/9] trace-cmd: Added implementation of htonll() and ntohll() Date: Thu, 21 Mar 2019 17:47:04 +0200 Message-Id: <20190321154709.24163-5-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Added implementation of htonll() and ntohll() as macros, if they are not already defined. Signed-off-by: Tzvetomir Stoyanov --- tracecmd/include/trace-msg.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tracecmd/include/trace-msg.h b/tracecmd/include/trace-msg.h index b7fe10b..445f799 100644 --- a/tracecmd/include/trace-msg.h +++ b/tracecmd/include/trace-msg.h @@ -15,4 +15,14 @@ extern unsigned int page_size; void plog(const char *fmt, ...); void pdie(const char *fmt, ...); +#ifndef htonll +# if __BYTE_ORDER == __LITTLE_ENDIAN +#define htonll(x) __bswap_64(x) +#define ntohll(x) __bswap_64(x) +#else +#define htonll(x) (x) +#define ntohll(x) (x) +#endif +#endif + #endif /* _TRACE_MSG_H_ */ From patchwork Thu Mar 21 15:47:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863883 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC5B66C2 for ; Thu, 21 Mar 2019 15:47:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B25F32A307 for ; Thu, 21 Mar 2019 15:47:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6AE52A30D; Thu, 21 Mar 2019 15:47:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0850E2A308 for ; Thu, 21 Mar 2019 15:47:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728525AbfCUPrT (ORCPT ); Thu, 21 Mar 2019 11:47:19 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:38214 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728528AbfCUPrT (ORCPT ); Thu, 21 Mar 2019 11:47:19 -0400 Received: by mail-wm1-f66.google.com with SMTP id a188so3244170wmf.3 for ; Thu, 21 Mar 2019 08:47:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Hzq6E/U5bBlF+OJm4031s0+EwWU3hqqKot4I/1+y9aE=; b=H+OzYwBHuducC+BVwTvqvAjb5wXwE3+PHnrz8DxF00HbK161Ob1zDE2rRPcjYhV7dI UBxfb7JbqRm0qyUnQqd8k3StNsp0lxTa61m4lpq/e9ZTYgsaq92DIKPPQddoxr9Um8GR 5Pf0hZt0U4V9bL4LnEbTYeD4i+vM2arMRe/FYLPw73aAcA7/LY/nXMILASqQCwLvVP8B hBk+zDadKefJP76Sl7M8ge8BCYviVOwaoakgWxPSWmNErJ//ZyutT+u546zbgAZhuXBk tup+Bm98+Jml0OKqQOfszjreVM7D8drG6SGAiy9x1gkIpbXOxc0lpwb3wDctSgfvd67S Lo9A== X-Gm-Message-State: APjAAAXiMpYw+m85glTnyrZsQGOIEIZ7NoHoVhIzEtRcWP/HDJ1AXqRB qleoBtxaICTOONqJm5Q3XrOdE8Bd X-Google-Smtp-Source: APXvYqwDSe1Xw1AeVoQ/mCTSSR/J+n4gkBTaEX9slLdb/rYLUNkVh7DHYUhvYAakCOqqClAN7Pbn3A== X-Received: by 2002:a1c:bac2:: with SMTP id k185mr2535856wmf.5.1553183237349; Thu, 21 Mar 2019 08:47:17 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.16 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:16 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 5/9] trace-cmd: Refactored few functions in trace-record.c Date: Thu, 21 Mar 2019 17:47:05 +0200 Message-Id: <20190321154709.24163-6-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to reuse the code inside the trace-cmd application, few functions from trace-record.c are refactored: - make_instances() and tracecmd_remove_instances() are splited. New ones are created: tracecmd_make_instance() and tracecmd_remove_instance(), which are visible outside the trace-record.c - Following functions are made non-static: tracecmd_init_instance() get_instance_dir(), write_instance_file(), write_tracing_on(), tracecmd_set_clock() - New function is implemented: tracecmd_local_cpu_count(), an internal API to get local_cpu_count. Signed-off-by: Tzvetomir Stoyanov --- tracecmd/include/trace-local.h | 9 ++++ tracecmd/trace-record.c | 88 +++++++++++++++++++--------------- 2 files changed, 59 insertions(+), 38 deletions(-) diff --git a/tracecmd/include/trace-local.h b/tracecmd/include/trace-local.h index d7bdb1f..8413054 100644 --- a/tracecmd/include/trace-local.h +++ b/tracecmd/include/trace-local.h @@ -235,6 +235,15 @@ void update_first_instance(struct buffer_instance *instance, int topt); void show_instance_file(struct buffer_instance *instance, const char *name); int count_cpus(void); +void write_tracing_on(struct buffer_instance *instance, int on); +char *get_instance_dir(struct buffer_instance *instance); +int write_instance_file(struct buffer_instance *instance, + const char *file, const char *str, const char *type); +void tracecmd_init_instance(struct buffer_instance *instance); +void tracecmd_make_instance(struct buffer_instance *instance); +int tracecmd_local_cpu_count(void); +void tracecmd_set_clock(struct buffer_instance *instance); +void tracecmd_remove_instance(struct buffer_instance *instance); /* No longer in event-utils.h */ void __noreturn die(const char *fmt, ...); /* Can be overriden */ diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index 177060d..eacf7d2 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -184,7 +184,7 @@ static inline int no_top_instance(void) return first_instance != &top_instance; } -static void init_instance(struct buffer_instance *instance) +void tracecmd_init_instance(struct buffer_instance *instance) { instance->event_next = &instance->events; } @@ -308,7 +308,7 @@ static void reset_save_file_cond(const char *file, int prio, */ void add_instance(struct buffer_instance *instance, int cpu_count) { - init_instance(instance); + tracecmd_init_instance(instance); instance->next = buffer_instances; if (first_instance == buffer_instances) first_instance = instance; @@ -495,7 +495,7 @@ static void add_event(struct buffer_instance *instance, struct event_list *event static void reset_event_list(struct buffer_instance *instance) { instance->events = NULL; - init_instance(instance); + tracecmd_init_instance(instance); } static char *get_temp_file(struct buffer_instance *instance, int cpu) @@ -791,8 +791,7 @@ get_instance_file(struct buffer_instance *instance, const char *file) return path; } -static char * -get_instance_dir(struct buffer_instance *instance) +char *get_instance_dir(struct buffer_instance *instance) { char *buf; char *path; @@ -1668,9 +1667,8 @@ static int write_file(const char *file, const char *str, const char *type) return ret; } -static int -write_instance_file(struct buffer_instance *instance, - const char *file, const char *str, const char *type) +int write_instance_file(struct buffer_instance *instance, + const char *file, const char *str, const char *type) { char *path; int ret; @@ -1946,7 +1944,7 @@ static int open_tracing_on(struct buffer_instance *instance) return fd; } -static void write_tracing_on(struct buffer_instance *instance, int on) +void write_tracing_on(struct buffer_instance *instance, int on) { int ret; int fd; @@ -2262,7 +2260,7 @@ void tracecmd_enable_events(void) enable_events(first_instance); } -static void set_clock(struct buffer_instance *instance) +void tracecmd_set_clock(struct buffer_instance *instance) { char *path; char *content; @@ -4316,49 +4314,58 @@ static void clear_func_filters(void) } } -static void make_instances(void) +void tracecmd_make_instance(struct buffer_instance *instance) { - struct buffer_instance *instance; struct stat st; char *path; int ret; + path = get_instance_dir(instance); + ret = stat(path, &st); + if (ret < 0) { + ret = mkdir(path, 0777); + if (ret < 0) + die("mkdir %s", path); + } else + /* Don't delete instances that already exist */ + instance->flags |= BUFFER_FL_KEEP; + tracecmd_put_tracing_file(path); + +} + +static void make_instances(void) +{ + struct buffer_instance *instance; + for_each_instance(instance) { if (is_guest(instance)) continue; + tracecmd_make_instance(instance); + } +} - path = get_instance_dir(instance); - ret = stat(path, &st); - if (ret < 0) { - ret = mkdir(path, 0777); - if (ret < 0) - die("mkdir %s", path); - } else - /* Don't delete instances that already exist */ - instance->flags |= BUFFER_FL_KEEP; - tracecmd_put_tracing_file(path); +void tracecmd_remove_instance(struct buffer_instance *instance) +{ + char *path; + + if (instance->tracing_on_fd > 0) { + close(instance->tracing_on_fd); + instance->tracing_on_fd = 0; } + path = get_instance_dir(instance); + rmdir(path); + tracecmd_put_tracing_file(path); } void tracecmd_remove_instances(void) { struct buffer_instance *instance; - char *path; - int ret; for_each_instance(instance) { /* Only delete what we created */ if (is_guest(instance) || (instance->flags & BUFFER_FL_KEEP)) continue; - if (instance->tracing_on_fd > 0) { - close(instance->tracing_on_fd); - instance->tracing_on_fd = 0; - } - path = get_instance_dir(instance); - ret = rmdir(path); - if (ret < 0) - die("rmdir %s", path); - tracecmd_put_tracing_file(path); + tracecmd_remove_instance(instance); } } @@ -4853,7 +4860,7 @@ void trace_stop(int argc, char **argv) int topt = 0; struct buffer_instance *instance = &top_instance; - init_instance(instance); + tracecmd_init_instance(instance); for (;;) { int c; @@ -4894,7 +4901,7 @@ void trace_restart(int argc, char **argv) int topt = 0; struct buffer_instance *instance = &top_instance; - init_instance(instance); + tracecmd_init_instance(instance); for (;;) { int c; @@ -4936,7 +4943,7 @@ void trace_reset(int argc, char **argv) int topt = 0; struct buffer_instance *instance = &top_instance; - init_instance(instance); + tracecmd_init_instance(instance); /* if last arg is -a, then -b and -d apply to all instances */ int last_specified_all = 0; @@ -5014,11 +5021,16 @@ static void init_common_record_context(struct common_record_context *ctx, memset(ctx, 0, sizeof(*ctx)); ctx->instance = &top_instance; ctx->curr_cmd = curr_cmd; - init_instance(ctx->instance); + tracecmd_init_instance(ctx->instance); local_cpu_count = count_cpus(); ctx->instance->cpu_count = local_cpu_count; } +int tracecmd_local_cpu_count(void) +{ + return local_cpu_count; +} + #define IS_EXTRACT(ctx) ((ctx)->curr_cmd == CMD_extract) #define IS_START(ctx) ((ctx)->curr_cmd == CMD_start) #define IS_STREAM(ctx) ((ctx)->curr_cmd == CMD_stream) @@ -5589,7 +5601,7 @@ static void record_trace(int argc, char **argv, tracecmd_disable_all_tracing(1); for_all_instances(instance) - set_clock(instance); + tracecmd_set_clock(instance); /* Record records the date first */ if (ctx->date && From patchwork Thu Mar 21 15:47:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863885 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E83616C2 for ; Thu, 21 Mar 2019 15:47:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CBA8B2A26B for ; 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Thu, 21 Mar 2019 08:47:17 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 6/9] trace-cmd: Find and store pids of tasks, which run virtual CPUs of given VM Date: Thu, 21 Mar 2019 17:47:06 +0200 Message-Id: <20190321154709.24163-7-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to match host and guest events, a mapping between guest VCPU and the host task, running this VCPU is needed. Extended existing struct guest to hold such mapping and added logic in read_qemu_guests() function to initialize it. Implemented a new internal API, get_guest_vcpu_pid(), to retrieve VCPU-task mapping for given VM. Signed-off-by: Tzvetomir Stoyanov --- tracecmd/include/trace-local.h | 1 + tracecmd/trace-record.c | 57 ++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+) diff --git a/tracecmd/include/trace-local.h b/tracecmd/include/trace-local.h index 8413054..62f5e47 100644 --- a/tracecmd/include/trace-local.h +++ b/tracecmd/include/trace-local.h @@ -245,6 +245,7 @@ int tracecmd_local_cpu_count(void); void tracecmd_set_clock(struct buffer_instance *instance); void tracecmd_remove_instance(struct buffer_instance *instance); +int get_guest_vcpu_pid(unsigned int guest_cid, unsigned int guest_vcpu); /* No longer in event-utils.h */ void __noreturn die(const char *fmt, ...); /* Can be overriden */ void *malloc_or_die(unsigned int size); /* Can be overridden */ diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index eacf7d2..72a8ed3 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -2746,10 +2746,12 @@ static bool is_digits(const char *s) return true; } +#define VCPUS_MAX 256 struct guest { char *name; int cid; int pid; + int cpu_pid[VCPUS_MAX]; }; static struct guest *guests; @@ -2767,6 +2769,46 @@ static char *get_qemu_guest_name(char *arg) return arg; } +static void read_qemu_guests_pids(char *guest_task, struct guest *guest) +{ + struct dirent *entry_t; + char path[PATH_MAX]; + char *buf = NULL; + size_t n = 0; + int vcpu; + DIR *dir; + FILE *ft; + + snprintf(path, sizeof(path), "/proc/%s/task", guest_task); + dir = opendir(path); + if (!dir) + return; + + while ((entry_t = readdir(dir))) { + if (!(entry_t->d_type == DT_DIR && is_digits(entry_t->d_name))) + continue; + + snprintf(path, sizeof(path), "/proc/%s/task/%s/comm", + guest_task, entry_t->d_name); + ft = fopen(path, "r"); + if (!ft) + continue; + if (getline(&buf, &n, ft) < 0) + goto next; + if (strncmp(buf, "CPU ", 4) != 0) + goto next; + + vcpu = atoi(buf+4); + if (!(vcpu >= 0 && vcpu < VCPUS_MAX)) + goto next; + guest->cpu_pid[vcpu] = atoi(entry_t->d_name); + +next: + fclose(ft); + } + free(buf); +} + static void read_qemu_guests(void) { static bool initialized; @@ -2828,6 +2870,8 @@ static void read_qemu_guests(void) if (!is_qemu) goto next; + read_qemu_guests_pids(entry->d_name, &guest); + guests = realloc(guests, (guests_len + 1) * sizeof(*guests)); if (!guests) die("Can not allocate guest buffer"); @@ -2873,6 +2917,19 @@ static char *parse_guest_name(char *guest, int *cid, int *port) return guest; } +int get_guest_vcpu_pid(unsigned int guest_cid, unsigned int guest_vcpu) +{ + int i; + + if (!guests || guest_vcpu >= VCPUS_MAX) + return -1; + + for (i = 0; i < guests_len; i++) + if (guest_cid == guests[i].cid) + return guests[i].cpu_pid[guest_vcpu]; + return -1; +} + static void set_prio(int prio) { struct sched_param sp; From patchwork Thu Mar 21 15:47:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863887 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F1D5B6C2 for ; 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Thu, 21 Mar 2019 08:47:20 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.18 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:19 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 7/9] trace-cmd: Implemented new API tracecmd_add_option_v() Date: Thu, 21 Mar 2019 17:47:07 +0200 Message-Id: <20190321154709.24163-8-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch implements a new tracecmd API, tracecmd_add_option_v() It adds new option in trace.dat, similar to tracecmd_add_option(), but the option's data is passed as list of buffers. The standard struct iovec is used as input parameter, containing the option's data buffers. Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 5 ++ include/traceevent/event-parse.h | 1 + tracecmd/trace-output.c | 117 ++++++++++++++++++++++++++----- 3 files changed, 106 insertions(+), 17 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 428d792..f7c043a 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -245,11 +245,16 @@ struct tracecmd_output *tracecmd_create_init_file_override(const char *output_fi struct tracecmd_option *tracecmd_add_option(struct tracecmd_output *handle, unsigned short id, int size, const void *data); +struct tracecmd_option * +tracecmd_add_option_v(struct tracecmd_output *handle, + unsigned short id, const struct iovec *vector, int count); + struct tracecmd_option *tracecmd_add_buffer_option(struct tracecmd_output *handle, const char *name, int cpus); int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus); int tracecmd_write_options(struct tracecmd_output *handle); +int tracecmd_append_options(struct tracecmd_output *handle); int tracecmd_update_option(struct tracecmd_output *handle, struct tracecmd_option *option, int size, const void *data); diff --git a/include/traceevent/event-parse.h b/include/traceevent/event-parse.h index 3f2ae80..9705b51 100644 --- a/include/traceevent/event-parse.h +++ b/include/traceevent/event-parse.h @@ -11,6 +11,7 @@ #include #include #include +#include #include "trace-seq.h" diff --git a/tracecmd/trace-output.c b/tracecmd/trace-output.c index 33d6ce3..d57539c 100644 --- a/tracecmd/trace-output.c +++ b/tracecmd/trace-output.c @@ -883,21 +883,23 @@ static struct tracecmd_output *create_file(const char *output_file, } /** - * tracecmd_add_option - add options to the file + * tracecmd_add_option_v - add options to the file * @handle: the output file handle name * @id: the id of the option - * @size: the size of the option data - * @data: the data to write to the file. + * @vector: array of vectors, pointing to the data to write in the file + * @count: number of items in the vector array * * Returns handle to update option if needed. * Just the content can be updated, with smaller or equal to * content than the specified size. */ struct tracecmd_option * -tracecmd_add_option(struct tracecmd_output *handle, - unsigned short id, int size, const void *data) +tracecmd_add_option_v(struct tracecmd_output *handle, + unsigned short id, const struct iovec *vector, int count) { struct tracecmd_option *option; + char *data = NULL; + int i, size = 0; /* * We can only add options before they were written. @@ -906,32 +908,63 @@ tracecmd_add_option(struct tracecmd_output *handle, if (handle->options_written) return NULL; - handle->nr_options++; + for (i = 0; i < count; i++) + size += vector[i].iov_len; + + /* Some IDs (like TRACECMD_OPTION_TRACECLOCK) pass vector with 0 / NULL data */ + if (size) { + data = malloc(size); + if (!data) { + warning("Insufficient memory"); + return NULL; + } + } option = malloc(sizeof(*option)); if (!option) { warning("Could not allocate space for option"); + free(data); return NULL; } - option->id = id; - option->size = size; - option->data = malloc(size); - if (!option->data) { - warning("Insufficient memory"); - free(option); - return NULL; + handle->nr_options++; + option->data = data; + for (i = 0; i < count; i++) { + if (vector[i].iov_base && vector[i].iov_len) { + memcpy(data, vector[i].iov_base, vector[i].iov_len); + data += vector[i].iov_len; + } } - - /* Some IDs (like TRACECMD_OPTION_TRACECLOCK) pass 0 / NULL data */ - if (size) - memcpy(option->data, data, size); + option->size = size; + option->id = id; list_add_tail(&option->list, &handle->options); return option; } +/** + * tracecmd_add_option - add options to the file + * @handle: the output file handle name + * @id: the id of the option + * @size: the size of the option data + * @data: the data to write to the file. + * + * Returns handle to update option if needed. + * Just the content can be updated, with smaller or equal to + * content than the specified size. + */ +struct tracecmd_option * +tracecmd_add_option(struct tracecmd_output *handle, + unsigned short id, int size, const void *data) +{ + struct iovec vect; + + vect.iov_base = data; + vect.iov_len = size; + return tracecmd_add_option_v(handle, id, &vect, 1); +} + int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus) { cpus = convert_endian_4(handle, cpus); @@ -979,6 +1012,56 @@ int tracecmd_write_options(struct tracecmd_output *handle) return 0; } +int tracecmd_append_options(struct tracecmd_output *handle) +{ + struct tracecmd_option *options; + unsigned short option; + unsigned short endian2; + unsigned int endian4; + off_t offset; + int r; + + /* If already written, ignore */ + if (handle->options_written) + return 0; + + if (lseek64(handle->fd, 0, SEEK_END) == (off_t)-1) + return -1; + offset = lseek64(handle->fd, -2, SEEK_CUR); + if (offset == (off_t)-1) + return -1; + + r = pread(handle->fd, &option, 2, offset); + if (r != 2 || option != TRACECMD_OPTION_DONE) + return -1; + + list_for_each_entry(options, &handle->options, list) { + endian2 = convert_endian_2(handle, options->id); + if (do_write_check(handle, &endian2, 2)) + return -1; + + endian4 = convert_endian_4(handle, options->size); + if (do_write_check(handle, &endian4, 4)) + return -1; + + /* Save the data location in case it needs to be updated */ + options->offset = lseek64(handle->fd, 0, SEEK_CUR); + + if (do_write_check(handle, options->data, + options->size)) + return -1; + } + + option = TRACECMD_OPTION_DONE; + + if (do_write_check(handle, &option, 2)) + return -1; + + handle->options_written = 1; + + return 0; +} + int tracecmd_update_option(struct tracecmd_output *handle, struct tracecmd_option *option, int size, const void *data) From patchwork Thu Mar 21 15:47:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863889 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2D2141708 for ; Thu, 21 Mar 2019 15:47:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D8E82A30A for ; Thu, 21 Mar 2019 15:47:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 01B492A310; Thu, 21 Mar 2019 15:47:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5FFDA2A312 for ; 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Thu, 21 Mar 2019 08:47:22 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.20 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:20 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 8/9] trace-cmd: Implemented new option in trace.dat file: TRACECMD_OPTION_TIME_SHIFT Date: Thu, 21 Mar 2019 17:47:08 +0200 Message-Id: <20190321154709.24163-9-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The TRACECMD_OPTION_TIME_SHIFT is used when synchronizing trace time stamps between two trace.dat files. It contains multiple long long (time, offset) pairs, describing time stamps _offset_, measured in the given local _time_. The content of the option buffer is: first 4 bytes - integer, count of timestamp offsets long long array of size _count_, local time in which the offset is measured long long array of size _count_, offset of the time stamps Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 1 + lib/trace-cmd/trace-input.c | 126 +++++++++++++++++++++++++++++++++- 2 files changed, 125 insertions(+), 2 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index f7c043a..5552396 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -82,6 +82,7 @@ enum { TRACECMD_OPTION_HOOK, TRACECMD_OPTION_OFFSET, TRACECMD_OPTION_CPUCOUNT, + TRACECMD_OPTION_TIME_SHIFT, }; enum { diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index 0a6e820..0ee5fae 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -75,6 +75,11 @@ struct input_buffer_instance { size_t offset; }; +struct ts_offset_sample { + long long time; + long long offset; +}; + struct tracecmd_input { struct tep_handle *pevent; struct tep_plugin_list *plugin_list; @@ -92,6 +97,8 @@ struct tracecmd_input { bool use_pipe; struct cpu_data *cpu_data; long long ts_offset; + int ts_samples_count; + struct ts_offset_sample *ts_samples; double ts2secs; char * cpustats; char * uname; @@ -1028,6 +1035,66 @@ static void free_next(struct tracecmd_input *handle, int cpu) free_record(record); } +static inline unsigned long long +timestamp_correction_calc(unsigned long long ts, struct ts_offset_sample *min, + struct ts_offset_sample *max) +{ + long long tscor = min->offset + + (((((long long)ts) - min->time)* + (max->offset-min->offset))/(max->time-min->time)); + + if (tscor < 0) + return ts - llabs(tscor); + + return ts + tscor; + +} + +static unsigned long long timestamp_correct(unsigned long long ts, + struct tracecmd_input *handle) +{ + int min, mid, max; + + if (handle->ts_offset) + return ts + handle->ts_offset; + if (!handle->ts_samples_count || !handle->ts_samples) + return ts; + + /* We have one sample, nothing to calc here */ + if (handle->ts_samples_count == 1) + return ts + handle->ts_samples[0].offset; + + /* We have two samples, nothing to search here */ + if (handle->ts_samples_count == 2) + return timestamp_correction_calc(ts, &handle->ts_samples[0], + &handle->ts_samples[1]); + + /* We have more than two samples */ + if (ts <= handle->ts_samples[0].time) + return timestamp_correction_calc(ts, + &handle->ts_samples[0], + &handle->ts_samples[1]); + else if (ts >= handle->ts_samples[handle->ts_samples_count-1].time) + return timestamp_correction_calc(ts, + &handle->ts_samples[handle->ts_samples_count-2], + &handle->ts_samples[handle->ts_samples_count-1]); + min = 0; + max = handle->ts_samples_count-1; + mid = (min + max)/2; + while (min <= max) { + if (ts < handle->ts_samples[mid].time) + min = mid - 1; + else if (ts > handle->ts_samples[mid].time) + max = mid + 1; + else + break; + mid = (min + max)/2; + } + + return timestamp_correction_calc(ts, &handle->ts_samples[mid], + &handle->ts_samples[mid+1]); +} + /* * Page is mapped, now read in the page header info. */ @@ -1049,7 +1116,7 @@ static int update_page_info(struct tracecmd_input *handle, int cpu) kbuffer_subbuffer_size(kbuf)); return -1; } - handle->cpu_data[cpu].timestamp = kbuffer_timestamp(kbuf) + handle->ts_offset; + handle->cpu_data[cpu].timestamp = timestamp_correct(kbuffer_timestamp(kbuf), handle); if (handle->ts2secs) handle->cpu_data[cpu].timestamp *= handle->ts2secs; @@ -1776,7 +1843,7 @@ read_again: goto read_again; } - handle->cpu_data[cpu].timestamp = ts + handle->ts_offset; + handle->cpu_data[cpu].timestamp = timestamp_correct(ts, handle); if (handle->ts2secs) { handle->cpu_data[cpu].timestamp *= handle->ts2secs; @@ -2101,6 +2168,41 @@ void tracecmd_set_ts2secs(struct tracecmd_input *handle, handle->use_trace_clock = false; } +static int tsync_offset_cmp(const void *a, const void *b) +{ + struct ts_offset_sample *ts_a = (struct ts_offset_sample *)a; + struct ts_offset_sample *ts_b = (struct ts_offset_sample *)b; + + if (ts_a->time > ts_b->time) + return 1; + if (ts_a->time < ts_b->time) + return -1; + return 0; +} + +static void tsync_offset_load(struct tracecmd_input *handle, char *buf) +{ + int i, j; + long long *buf8 = (long long *)buf; + + for (i = 0; i < handle->ts_samples_count; i++) { + handle->ts_samples[i].time = tep_read_number(handle->pevent, + buf8+i, 8); + handle->ts_samples[i].offset = tep_read_number(handle->pevent, + buf8+handle->ts_samples_count+i, 8); + } + qsort(handle->ts_samples, + handle->ts_samples_count, sizeof(struct ts_offset_sample), + tsync_offset_cmp); + /* Filter possible samples with equal time */ + for (i = 0, j = 0; i < handle->ts_samples_count; i++) { + if (i == 0 || + handle->ts_samples[i].time != handle->ts_samples[i-1].time) { + handle->ts_samples[j++] = handle->ts_samples[i]; + } + } +} + static int handle_options(struct tracecmd_input *handle) { long long offset; @@ -2111,6 +2213,7 @@ static int handle_options(struct tracecmd_input *handle) struct input_buffer_instance *buffer; struct hook_list *hook; char *buf; + int tsync; int cpus; for (;;) { @@ -2155,6 +2258,25 @@ static int handle_options(struct tracecmd_input *handle) offset = strtoll(buf, NULL, 0); handle->ts_offset += offset; break; + case TRACECMD_OPTION_TIME_SHIFT: + /* + * int (4 bytes) count of timestamp offsets. + * long long array of size [count] of times, + * when the offsets were calculated. + * long long array of size [count] of timestamp offsets. + */ + if (handle->flags & TRACECMD_FL_IGNORE_DATE) + break; + handle->ts_samples_count = tep_read_number(handle->pevent, + buf, 4); + tsync = (sizeof(long long)*handle->ts_samples_count); + if (size != (4+(2*tsync))) + break; + handle->ts_samples = malloc(2*tsync); + if (!handle->ts_samples) + return -ENOMEM; + tsync_offset_load(handle, buf+4); + break; case TRACECMD_OPTION_CPUSTAT: buf[size-1] = '\n'; cpustats = realloc(cpustats, cpustats_size + size + 1); From patchwork Thu Mar 21 15:47:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10863891 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1B3B96C2 for ; 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Thu, 21 Mar 2019 08:47:24 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id c10sm8940049wrt.65.2019.03.21.08.47.22 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Mar 2019 08:47:22 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v8 9/9] trace-cmd [POC]: Implemented timestamps synch algorithm, using vsock events. Date: Thu, 21 Mar 2019 17:47:09 +0200 Message-Id: <20190321154709.24163-10-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190321154709.24163-1-tstoyanov@vmware.com> References: <20190321154709.24163-1-tstoyanov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is a POC patch, implementing an algorithm for syncing timestamps between host and guest machines, using vsock trace events to catch the host / guest time. Signed-off-by: Tzvetomir Stoyanov --- include/trace-cmd/trace-cmd.h | 21 +- tracecmd/Makefile | 1 + tracecmd/include/trace-local.h | 33 +- tracecmd/trace-agent.c | 13 +- tracecmd/trace-msg.c | 208 ++++++++- tracecmd/trace-record.c | 85 +++- tracecmd/trace-timesync.c | 805 +++++++++++++++++++++++++++++++++ 7 files changed, 1130 insertions(+), 36 deletions(-) create mode 100644 tracecmd/trace-timesync.c diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 5552396..905f3ec 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -341,16 +341,29 @@ bool tracecmd_msg_done(struct tracecmd_msg_handle *msg_handle); void tracecmd_msg_set_done(struct tracecmd_msg_handle *msg_handle); int tracecmd_msg_send_trace_req(struct tracecmd_msg_handle *msg_handle, - int argc, char **argv, bool use_fifos); + int argc, char **argv, bool use_fifos, + bool do_tsync); int tracecmd_msg_recv_trace_req(struct tracecmd_msg_handle *msg_handle, - int *argc, char ***argv, bool *use_fifos); + int *argc, char ***argv, bool *use_fifos, + bool *do_tsync); int tracecmd_msg_send_trace_resp(struct tracecmd_msg_handle *msg_handle, int nr_cpus, int page_size, - unsigned int *ports, bool use_fifos); + unsigned int *ports, bool use_fifos, + bool do_tsync); int tracecmd_msg_recv_trace_resp(struct tracecmd_msg_handle *msg_handle, int *nr_cpus, int *page_size, - unsigned int **ports, bool *use_fifos); + unsigned int **ports, bool *use_fifos, + bool *do_tsync); + +struct tracecmd_clock_sync; + +int tracecmd_msg_rcv_time_sync(struct tracecmd_msg_handle *msg_handle, + struct tracecmd_clock_sync *clock_sync, + long long *offset, long long *timestamp); +int tracecmd_msg_snd_time_sync(struct tracecmd_msg_handle *msg_handle, + struct tracecmd_clock_sync *clock_sync, + long long *offset, long long *timestamp); /* --- Plugin handling --- */ extern struct tep_plugin_option trace_ftrace_options[]; diff --git a/tracecmd/Makefile b/tracecmd/Makefile index d3e3080..8a73bf7 100644 --- a/tracecmd/Makefile +++ b/tracecmd/Makefile @@ -32,6 +32,7 @@ TRACE_CMD_OBJS += trace-list.o TRACE_CMD_OBJS += trace-output.o TRACE_CMD_OBJS += trace-usage.o TRACE_CMD_OBJS += trace-msg.o +TRACE_CMD_OBJS += trace-timesync.o ifeq ($(VSOCK_DEFINED), 1) TRACE_CMD_OBJS += trace-agent.o diff --git a/tracecmd/include/trace-local.h b/tracecmd/include/trace-local.h index 62f5e47..7688b02 100644 --- a/tracecmd/include/trace-local.h +++ b/tracecmd/include/trace-local.h @@ -26,6 +26,7 @@ extern int quiet; typedef unsigned long long u64; struct buffer_instance; +struct tracecmd_clock_sync; /* for local shared information with trace-cmd executable */ @@ -101,7 +102,7 @@ void trace_usage(int argc, char **argv); int trace_record_agent(struct tracecmd_msg_handle *msg_handle, int cpus, int *fds, - int argc, char **argv, bool use_fifos); + int argc, char **argv, bool use_fifos, bool do_tsync); struct hook_list; @@ -214,6 +215,12 @@ struct buffer_instance { int port; int *fds; bool use_fifos; + bool do_tsync; + + struct tracecmd_clock_sync *clock_sync; + int time_sync_count; + long long *time_sync_ts; + long long *time_sync_offsets; }; extern struct buffer_instance top_instance; @@ -235,6 +242,30 @@ void update_first_instance(struct buffer_instance *instance, int topt); void show_instance_file(struct buffer_instance *instance, const char *name); int count_cpus(void); + +struct tracecmd_time_sync_event { + int id; + int cpu; + int pid; + unsigned long long ts; +}; + +int tracecmd_clock_get_peer(struct tracecmd_clock_sync *clock_context, + unsigned int *remote_cid, unsigned int *remote_port); +bool tracecmd_time_sync_check(void); +void tracecmd_clock_context_free(struct buffer_instance *instance); +int tracecmd_clock_find_event(struct tracecmd_clock_sync *clock, int cpu, + struct tracecmd_time_sync_event *event); +void tracecmd_clock_synch_enable(struct tracecmd_clock_sync *clock_context); +void tracecmd_clock_synch_disable(struct tracecmd_clock_sync *clock_context); +void tracecmd_clock_synch_calc_reset(struct tracecmd_clock_sync *clock_context); +void tracecmd_clock_synch_calc_probe(struct tracecmd_clock_sync *clock_context, + long long ts_local, long long ts_remote); +int tracecmd_clock_synch_calc(struct tracecmd_clock_sync *clock_context, + long long *offset_ret, long long *time_ret); +void sync_time_with_host_v3(struct buffer_instance *instance); +void sync_time_with_guest_v3(struct buffer_instance *instance); + void write_tracing_on(struct buffer_instance *instance, int on); char *get_instance_dir(struct buffer_instance *instance); int write_instance_file(struct buffer_instance *instance, diff --git a/tracecmd/trace-agent.c b/tracecmd/trace-agent.c index 7389f72..2189bc1 100644 --- a/tracecmd/trace-agent.c +++ b/tracecmd/trace-agent.c @@ -116,6 +116,7 @@ static void agent_handle(int sd, int nr_cpus, int page_size) char **argv = NULL; int argc = 0; bool use_fifos; + bool do_tsync; int *fds; int ret; @@ -128,7 +129,8 @@ static void agent_handle(int sd, int nr_cpus, int page_size) if (!msg_handle) die("Failed to allocate message handle"); - ret = tracecmd_msg_recv_trace_req(msg_handle, &argc, &argv, &use_fifos); + ret = tracecmd_msg_recv_trace_req(msg_handle, &argc, &argv, + &use_fifos, &do_tsync); if (ret < 0) die("Failed to receive trace request"); @@ -137,13 +139,18 @@ static void agent_handle(int sd, int nr_cpus, int page_size) if (!use_fifos) make_vsocks(nr_cpus, fds, ports); + if (do_tsync) { + do_tsync = tracecmd_time_sync_check(); + if (!do_tsync) + warning("Failed to negotiate timestamps synchronization with the host"); + } ret = tracecmd_msg_send_trace_resp(msg_handle, nr_cpus, page_size, - ports, use_fifos); + ports, use_fifos, do_tsync); if (ret < 0) die("Failed to send trace response"); - trace_record_agent(msg_handle, nr_cpus, fds, argc, argv, use_fifos); + trace_record_agent(msg_handle, nr_cpus, fds, argc, argv, use_fifos, do_tsync); free(argv[0]); free(argv); diff --git a/tracecmd/trace-msg.c b/tracecmd/trace-msg.c index 065a01e..bb3c060 100644 --- a/tracecmd/trace-msg.c +++ b/tracecmd/trace-msg.c @@ -26,8 +26,12 @@ #include "trace-local.h" #include "trace-msg.h" +typedef __u16 u16; +typedef __s16 s16; typedef __u32 u32; typedef __be32 be32; +typedef __u64 u64; +typedef __s64 s64; static inline void dprint(const char *fmt, ...) { @@ -50,6 +54,9 @@ static inline void dprint(const char *fmt, ...) unsigned int page_size; +/* Try a few times to get an accurate time sync */ +#define TSYNC_TRIES 300 + struct tracecmd_msg_opt { be32 size; be32 opt_cmd; @@ -76,6 +83,20 @@ struct tracecmd_msg_trace_resp { be32 page_size; } __attribute__((packed)); +struct tracecmd_msg_tsync_stop { + long long offset; + long long timestamp; +} __attribute__((packed)); + +struct tracecmd_msg_tsync_req { + u16 cpu; +} __attribute__((packed)); + +struct tracecmd_msg_tsync_resp { + u64 time; +} __attribute__((packed)); + + struct tracecmd_msg_header { be32 size; be32 cmd; @@ -83,14 +104,19 @@ struct tracecmd_msg_header { } __attribute__((packed)); #define MSG_MAP \ - C(CLOSE, 0, 0), \ - C(TINIT, 1, sizeof(struct tracecmd_msg_tinit)), \ - C(RINIT, 2, sizeof(struct tracecmd_msg_rinit)), \ - C(SEND_DATA, 3, 0), \ - C(FIN_DATA, 4, 0), \ - C(NOT_SUPP, 5, 0), \ - C(TRACE_REQ, 6, sizeof(struct tracecmd_msg_trace_req)), \ - C(TRACE_RESP, 7, sizeof(struct tracecmd_msg_trace_resp)), + C(CLOSE, 0, 0), \ + C(TINIT, 1, sizeof(struct tracecmd_msg_tinit)), \ + C(RINIT, 2, sizeof(struct tracecmd_msg_rinit)), \ + C(SEND_DATA, 3, 0), \ + C(FIN_DATA, 4, 0), \ + C(NOT_SUPP, 5, 0), \ + C(TRACE_REQ, 6, sizeof(struct tracecmd_msg_trace_req)), \ + C(TRACE_RESP, 7, sizeof(struct tracecmd_msg_trace_resp)),\ + C(TSYNC_START, 8, 0), \ + C(TSYNC_STOP, 9, sizeof(struct tracecmd_msg_tsync_stop)),\ + C(TSYNC_PROBE, 11, 0), \ + C(TSYNC_REQ, 11, sizeof(struct tracecmd_msg_tsync_req)), \ + C(TSYNC_RESP, 12, sizeof(struct tracecmd_msg_tsync_resp)), #undef C #define C(a,b,c) MSG_##a = b @@ -120,10 +146,13 @@ static const char *cmd_to_name(int cmd) struct tracecmd_msg { struct tracecmd_msg_header hdr; union { - struct tracecmd_msg_tinit tinit; - struct tracecmd_msg_rinit rinit; - struct tracecmd_msg_trace_req trace_req; - struct tracecmd_msg_trace_resp trace_resp; + struct tracecmd_msg_tinit tinit; + struct tracecmd_msg_rinit rinit; + struct tracecmd_msg_trace_req trace_req; + struct tracecmd_msg_trace_resp trace_resp; + struct tracecmd_msg_tsync_stop ts_stop; + struct tracecmd_msg_tsync_req ts_req; + struct tracecmd_msg_tsync_resp ts_resp; }; union { struct tracecmd_msg_opt *opt; @@ -161,6 +190,7 @@ static int msg_write(int fd, struct tracecmd_msg *msg) enum msg_trace_flags { MSG_TRACE_USE_FIFOS = 1 << 0, + MSG_TRACE_DO_TSYNC = 1 << 1, }; enum msg_opt_command { @@ -744,7 +774,8 @@ error: return ret; } -static int make_trace_req(struct tracecmd_msg *msg, int argc, char **argv, bool use_fifos) +static int make_trace_req(struct tracecmd_msg *msg, int argc, char **argv, + bool use_fifos, bool do_tsync) { size_t args_size = 0; char *p; @@ -754,7 +785,12 @@ static int make_trace_req(struct tracecmd_msg *msg, int argc, char **argv, bool args_size += strlen(argv[i]) + 1; msg->hdr.size = htonl(ntohl(msg->hdr.size) + args_size); - msg->trace_req.flags = use_fifos ? htonl(MSG_TRACE_USE_FIFOS) : htonl(0); + msg->trace_req.flags = 0; + if (use_fifos) + msg->trace_req.flags |= MSG_TRACE_USE_FIFOS; + if (do_tsync) + msg->trace_req.flags |= MSG_TRACE_DO_TSYNC; + msg->trace_req.flags = htonl(msg->trace_req.flags); msg->trace_req.argc = htonl(argc); msg->buf = calloc(args_size, 1); if (!msg->buf) @@ -768,13 +804,14 @@ static int make_trace_req(struct tracecmd_msg *msg, int argc, char **argv, bool } int tracecmd_msg_send_trace_req(struct tracecmd_msg_handle *msg_handle, - int argc, char **argv, bool use_fifos) + int argc, char **argv, bool use_fifos, + bool do_tsync) { struct tracecmd_msg msg; int ret; tracecmd_msg_init(MSG_TRACE_REQ, &msg); - ret = make_trace_req(&msg, argc, argv, use_fifos); + ret = make_trace_req(&msg, argc, argv, use_fifos, do_tsync); if (ret < 0) return ret; @@ -787,7 +824,8 @@ int tracecmd_msg_send_trace_req(struct tracecmd_msg_handle *msg_handle, * free(argv); */ int tracecmd_msg_recv_trace_req(struct tracecmd_msg_handle *msg_handle, - int *argc, char ***argv, bool *use_fifos) + int *argc, char ***argv, bool *use_fifos, + bool *do_tsync) { struct tracecmd_msg msg; char *p, *buf_end, **args; @@ -840,6 +878,7 @@ int tracecmd_msg_recv_trace_req(struct tracecmd_msg_handle *msg_handle, *argc = nr_args; *argv = args; *use_fifos = ntohl(msg.trace_req.flags) & MSG_TRACE_USE_FIFOS; + *do_tsync = ntohl(msg.trace_req.flags) & MSG_TRACE_DO_TSYNC; /* * On success we're passing msg.buf to the caller through argv[0] so we @@ -859,14 +898,136 @@ out: return ret; } +int tracecmd_msg_rcv_time_sync(struct tracecmd_msg_handle *msg_handle, + struct tracecmd_clock_sync *clock_context, + long long *offset, long long *timestamp) +{ + struct tracecmd_time_sync_event event; + unsigned int remote_cid = 0; + struct tracecmd_msg msg; + int cpu_pid, ret; + + if (clock_context == NULL || msg_handle == NULL) + return 0; + + if (offset) + *offset = 0; + + ret = tracecmd_msg_recv(msg_handle->fd, &msg); + if (ret < 0 || ntohl(msg.hdr.cmd) == MSG_TSYNC_STOP) + return 0; + if (ntohl(msg.hdr.cmd) != MSG_TSYNC_START) { + handle_unexpected_msg(msg_handle, &msg); + return 0; + } + + tracecmd_clock_get_peer(clock_context, &remote_cid, NULL); + tracecmd_msg_init(MSG_TSYNC_START, &msg); + tracecmd_msg_send(msg_handle->fd, &msg); + tracecmd_clock_synch_enable(clock_context); + + do { + memset(&event, 0, sizeof(event)); + ret = tracecmd_msg_recv(msg_handle->fd, &msg); + if (ret < 0 || ntohl(msg.hdr.cmd) == MSG_TSYNC_STOP) + break; + if (ntohl(msg.hdr.cmd) != MSG_TSYNC_PROBE) { + handle_unexpected_msg(msg_handle, &msg); + break; + } + ret = tracecmd_msg_recv(msg_handle->fd, &msg); + if (ret < 0 || ntohl(msg.hdr.cmd) == MSG_TSYNC_STOP) + break; + if (ntohl(msg.hdr.cmd) != MSG_TSYNC_REQ) { + handle_unexpected_msg(msg_handle, &msg); + break; + } + /* Get kvm event related to the corresponding VCPU context */ + cpu_pid = get_guest_vcpu_pid(remote_cid, ntohs(msg.ts_req.cpu)); + tracecmd_clock_find_event(clock_context, cpu_pid, &event); + tracecmd_msg_init(MSG_TSYNC_RESP, &msg); + msg.ts_resp.time = htonll(event.ts); + tracecmd_msg_send(msg_handle->fd, &msg); + } while (true); + + tracecmd_clock_synch_disable(clock_context); + + if (ret >= 0 && ntohl(msg.hdr.cmd) == MSG_TSYNC_STOP) { + if (offset) + *offset = ntohll(msg.ts_stop.offset); + if (timestamp) + *timestamp = ntohll(msg.ts_stop.timestamp); + } + + msg_free(&msg); + return 0; +} + +int tracecmd_msg_snd_time_sync(struct tracecmd_msg_handle *msg_handle, + struct tracecmd_clock_sync *clock_context, + long long *offset, long long *timestamp) +{ + struct tracecmd_time_sync_event event; + int sync_loop = TSYNC_TRIES; + struct tracecmd_msg msg; + int ret; + + if (clock_context == NULL || msg_handle == NULL) + return 0; + + tracecmd_msg_init(MSG_TSYNC_START, &msg); + tracecmd_msg_send(msg_handle->fd, &msg); + ret = tracecmd_msg_recv(msg_handle->fd, &msg); + if (ret < 0 || ntohl(msg.hdr.cmd) != MSG_TSYNC_START) + return 0; + tracecmd_clock_synch_calc_reset(clock_context); + tracecmd_clock_synch_enable(clock_context); + + do { + tracecmd_msg_init(MSG_TSYNC_PROBE, &msg); + tracecmd_msg_send(msg_handle->fd, &msg); + /* Get the ts and CPU of the sent event */ + ret = tracecmd_clock_find_event(clock_context, -1, &event); + tracecmd_msg_init(MSG_TSYNC_REQ, &msg); + msg.ts_req.cpu = htons(event.cpu); + tracecmd_msg_send(msg_handle->fd, &msg); + memset(&msg, 0, sizeof(msg)); + ret = tracecmd_msg_recv(msg_handle->fd, &msg); + if (ret < 0) + break; + if (ntohl(msg.hdr.cmd) != MSG_TSYNC_RESP) { + handle_unexpected_msg(msg_handle, &msg); + break; + } + tracecmd_clock_synch_calc_probe(clock_context, + event.ts, + htonll(msg.ts_resp.time)); + } while (--sync_loop); + + tracecmd_clock_synch_disable(clock_context); + tracecmd_clock_synch_calc(clock_context, offset, timestamp); + tracecmd_msg_init(MSG_TSYNC_STOP, &msg); + msg.ts_stop.offset = htonll(*offset); + msg.ts_stop.timestamp = htonll(*timestamp); + tracecmd_msg_send(msg_handle->fd, &msg); + + msg_free(&msg); + return 0; +} + static int make_trace_resp(struct tracecmd_msg *msg, int page_size, int nr_cpus, - unsigned int *ports, bool use_fifos) + unsigned int *ports, bool use_fifos, bool do_tsync) { int ports_size = nr_cpus * sizeof(*msg->port_array); int i; msg->hdr.size = htonl(ntohl(msg->hdr.size) + ports_size); - msg->trace_resp.flags = use_fifos ? htonl(MSG_TRACE_USE_FIFOS) : htonl(0); + msg->trace_resp.flags = 0; + if (use_fifos) + msg->trace_resp.flags |= MSG_TRACE_USE_FIFOS; + if (do_tsync) + msg->trace_resp.flags |= MSG_TRACE_DO_TSYNC; + msg->trace_resp.flags = htonl(msg->trace_resp.flags); msg->trace_resp.cpus = htonl(nr_cpus); msg->trace_resp.page_size = htonl(page_size); @@ -882,13 +1043,14 @@ static int make_trace_resp(struct tracecmd_msg *msg, int page_size, int nr_cpus, int tracecmd_msg_send_trace_resp(struct tracecmd_msg_handle *msg_handle, int nr_cpus, int page_size, - unsigned int *ports, bool use_fifos) + unsigned int *ports, bool use_fifos, + bool do_tsync) { struct tracecmd_msg msg; int ret; tracecmd_msg_init(MSG_TRACE_RESP, &msg); - ret = make_trace_resp(&msg, page_size, nr_cpus, ports, use_fifos); + ret = make_trace_resp(&msg, page_size, nr_cpus, ports, use_fifos, do_tsync); if (ret < 0) return ret; @@ -897,7 +1059,8 @@ int tracecmd_msg_send_trace_resp(struct tracecmd_msg_handle *msg_handle, int tracecmd_msg_recv_trace_resp(struct tracecmd_msg_handle *msg_handle, int *nr_cpus, int *page_size, - unsigned int **ports, bool *use_fifos) + unsigned int **ports, bool *use_fifos, + bool *do_tsync) { struct tracecmd_msg msg; ssize_t buf_len; @@ -920,6 +1083,7 @@ int tracecmd_msg_recv_trace_resp(struct tracecmd_msg_handle *msg_handle, } *use_fifos = ntohl(msg.trace_resp.flags) & MSG_TRACE_USE_FIFOS; + *do_tsync = ntohl(msg.trace_resp.flags) & MSG_TRACE_DO_TSYNC; *nr_cpus = ntohl(msg.trace_resp.cpus); *page_size = ntohl(msg.trace_resp.page_size); *ports = calloc(*nr_cpus, sizeof(**ports)); diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index 72a8ed3..14f3cf9 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -210,6 +210,8 @@ struct common_record_context { char *date2ts; char *max_graph_depth; int data_flags; + int time_shift_count; + struct tracecmd_option *time_shift_option; int record_all; int total_disable; @@ -649,11 +651,20 @@ static void tell_guests_to_stop(void) for_all_instances(instance) { if (is_guest(instance)) { tracecmd_msg_send_close_msg(instance->msg_handle); - tracecmd_msg_handle_close(instance->msg_handle); } } } +static void close_guests_handle(void) +{ + struct buffer_instance *instance; + + for_all_instances(instance) { + if (is_guest(instance)) + tracecmd_msg_handle_close(instance->msg_handle); + } +} + static void stop_threads(enum trace_type type) { struct timeval tv = { 0, 0 }; @@ -3360,6 +3371,7 @@ static void connect_to_agent(struct buffer_instance *instance) unsigned int *ports; int i, *fds = NULL; bool use_fifos = false; + bool do_tsync, do_tsync_reply; if (!no_fifos) { nr_fifos = open_guest_fifos(instance->name, &fds); @@ -3371,20 +3383,24 @@ static void connect_to_agent(struct buffer_instance *instance) die("Failed to connect to vsocket @%d:%d", instance->cid, instance->port); + do_tsync = tracecmd_time_sync_check(); + msg_handle = tracecmd_msg_handle_alloc(sd, 0); if (!msg_handle) die("Failed to allocate message handle"); ret = tracecmd_msg_send_trace_req(msg_handle, instance->argc, - instance->argv, use_fifos); + instance->argv, use_fifos, do_tsync); if (ret < 0) die("Failed to send trace request"); ret = tracecmd_msg_recv_trace_resp(msg_handle, &nr_cpus, &page_size, - &ports, &use_fifos); + &ports, &use_fifos, &do_tsync_reply); if (ret < 0) die("Failed to receive trace response"); - + if (do_tsync != do_tsync_reply) + warning("Failed to negotiate timestamps synchronization with the guest %s", + instance->name); if (use_fifos) { if (nr_cpus != nr_fifos) { warning("number of FIFOs (%d) for guest %s differs " @@ -3402,10 +3418,13 @@ static void connect_to_agent(struct buffer_instance *instance) } instance->use_fifos = use_fifos; + instance->do_tsync = do_tsync_reply; instance->cpu_count = nr_cpus; /* the msg_handle now points to the guest fd */ instance->msg_handle = msg_handle; + + sync_time_with_guest_v3(instance); } static void setup_guest(struct buffer_instance *instance) @@ -3430,10 +3449,13 @@ static void setup_guest(struct buffer_instance *instance) close(fd); } -static void setup_agent(struct buffer_instance *instance, struct common_record_context *ctx) +static void setup_agent(struct buffer_instance *instance, + struct common_record_context *ctx) { struct tracecmd_output *network_handle; + sync_time_with_host_v3(instance); + network_handle = tracecmd_create_init_fd_msg(instance->msg_handle, listed_events); add_options(network_handle, ctx); @@ -5609,6 +5631,42 @@ static bool has_local_instances(void) return false; } +//#define TSYNC_DEBUG +static void write_guest_time_shift(struct buffer_instance *instance) +{ + struct tracecmd_output *handle; + struct iovec vector[3]; + char *file; + int fd; + + if (!instance->time_sync_count) + return; + + file = get_guest_file(output_file, instance->name); + fd = open(file, O_RDWR); + if (fd < 0) + die("error opening %s", file); + put_temp_file(file); + handle = tracecmd_get_output_handle_fd(fd); + vector[0].iov_len = sizeof(instance->time_sync_count); + vector[0].iov_base = &instance->time_sync_count; + vector[1].iov_len = sizeof(long long) * instance->time_sync_count; + vector[1].iov_base = instance->time_sync_ts; + vector[2].iov_len = sizeof(long long) * instance->time_sync_count; + vector[2].iov_base = instance->time_sync_offsets; + tracecmd_add_option_v(handle, TRACECMD_OPTION_TIME_SHIFT, vector, 3); + tracecmd_append_options(handle); + tracecmd_output_close(handle); +#ifdef TSYNC_DEBUG + if (instance->time_sync_count > 1) + printf("\n\rDetected %lld ns ts offset drift in %lld ns for guest %s\n\r", + instance->time_sync_offsets[instance->time_sync_count-1] - + instance->time_sync_offsets[0], + instance->time_sync_ts[instance->time_sync_count-1]- + instance->time_sync_ts[0], instance->name); +#endif +} + /* * This function contains common code for the following commands: * record, start, stream, profile. @@ -5728,6 +5786,20 @@ static void record_trace(int argc, char **argv, if (!latency) wait_threads(); + if (ctx->instance && is_agent(ctx->instance)) { + sync_time_with_host_v3(ctx->instance); + tracecmd_clock_context_free(ctx->instance); + } else { + for_all_instances(instance) { + if (is_guest(instance)) { + sync_time_with_guest_v3(instance); + write_guest_time_shift(instance); + tracecmd_clock_context_free(instance); + } + } + } + close_guests_handle(); + if (IS_RECORD(ctx)) { record_data(ctx); delete_thread_data(); @@ -5866,7 +5938,7 @@ void trace_record(int argc, char **argv) int trace_record_agent(struct tracecmd_msg_handle *msg_handle, int cpus, int *fds, int argc, char **argv, - bool use_fifos) + bool use_fifos, bool do_tsync) { struct common_record_context ctx; char **argv_plus; @@ -5893,6 +5965,7 @@ int trace_record_agent(struct tracecmd_msg_handle *msg_handle, ctx.instance->fds = fds; ctx.instance->use_fifos = use_fifos; + ctx.instance->do_tsync = do_tsync; ctx.instance->flags |= BUFFER_FL_AGENT; ctx.instance->msg_handle = msg_handle; msg_handle->version = V3_PROTOCOL; diff --git a/tracecmd/trace-timesync.c b/tracecmd/trace-timesync.c new file mode 100644 index 0000000..0d939f6 --- /dev/null +++ b/tracecmd/trace-timesync.c @@ -0,0 +1,805 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019, VMware, Tzvetomir Stoyanov + * + */ + +#include +#include +#include +#include +#include +#include "trace-local.h" + +//#define TSYNC_DEBUG + +static int clock_sync_x86_host_init(struct tracecmd_clock_sync *clock_context); +static int clock_sync_x86_host_free(struct tracecmd_clock_sync *clock_context); +static int clock_sync_x86_host_find_events(struct tracecmd_clock_sync *clock, + int cpu, struct tracecmd_time_sync_event *event); +static int clock_sync_x86_guest_init(struct tracecmd_clock_sync *clock_context); +static int clock_sync_x86_guest_free(struct tracecmd_clock_sync *clock_context); +static int clock_sync_x86_guest_find_events(struct tracecmd_clock_sync *clock, + int pid, + struct tracecmd_time_sync_event *event); + +struct tracecmd_event_descr { + char *system; + char *name; +}; + +struct tracecmd_ftrace_param { + char *file; + char *set; + char *reset; +}; + +enum clock_sync_context { + CLOCK_KVM_X86_VSOCK_HOST, + CLOCK_KVM_X86_VSOCK_GUEST, + CLOCK_CONTEXT_MAX, +}; + +struct tracecmd_clock_sync { + enum clock_sync_context clock_context_id; + struct tracecmd_ftrace_param *ftrace_params; + struct tracecmd_time_sync_event *events; + int events_count; + struct tep_handle *tep; + struct buffer_instance *vinst; + + int probes_count; + int bad_probes; + int probes_size; + long long *times; + long long *offsets; + long long offset_av; + long long offset_min; + long long offset_max; + int debug_fd; + + unsigned int local_cid; + unsigned int local_port; + unsigned int remote_cid; + unsigned int remote_port; +}; + +struct { + const char *systems[3]; + struct tracecmd_ftrace_param ftrace_params[5]; + struct tracecmd_event_descr events[3]; + int (*clock_sync_init)(struct tracecmd_clock_sync *clock_context); + int (*clock_sync_free)(struct tracecmd_clock_sync *clock_context); + int (*clock_sync_find_events)(struct tracecmd_clock_sync *clock_context, + int pid, + struct tracecmd_time_sync_event *event); + int (*clock_sync_load)(struct tracecmd_clock_sync *clock_context); + int (*clock_sync_unload)(struct tracecmd_clock_sync *clock_context); +} static clock_sync[CLOCK_CONTEXT_MAX] = { + { /* CLOCK_KVM_X86_VSOCK_HOST */ + .systems = {"vsock", "ftrace", NULL}, + .ftrace_params = { + {"set_ftrace_filter", "vmx_read_l1_tsc_offset\nsvm_read_l1_tsc_offset", "\0"}, + {"current_tracer", "function", "nop"}, + {"events/vsock/virtio_transport_recv_pkt/enable", "1", "0"}, + {"events/vsock/virtio_transport_recv_pkt/filter", NULL, "\0"}, + {NULL, NULL, NULL} }, + .events = { + {.system = "ftrace", .name = "function"}, + {.system = "vsock", .name = "virtio_transport_recv_pkt"}, + {.system = NULL, .name = NULL} }, + clock_sync_x86_host_init, + clock_sync_x86_host_free, + clock_sync_x86_host_find_events, + }, + + { /* CLOCK_KVM_X86_VSOCK_GUEST */ + .systems = { "vsock", "ftrace", NULL}, + .ftrace_params = { + {"set_ftrace_filter", "vp_notify", "\0"}, + {"current_tracer", "function", "nop"}, + {"events/vsock/virtio_transport_alloc_pkt/enable", "1", "0"}, + {"events/vsock/virtio_transport_alloc_pkt/filter", NULL, "\0"}, + {NULL, NULL, NULL}, + }, + .events = { + {.system = "vsock", .name = "virtio_transport_alloc_pkt"}, + {.system = "ftrace", .name = "function"}, + {.system = NULL, .name = NULL} + }, + clock_sync_x86_guest_init, + clock_sync_x86_guest_free, + clock_sync_x86_guest_find_events, + } +}; + +static int clock_sync_x86_host_init(struct tracecmd_clock_sync *clock_context) +{ + char vsock_filter[255]; + + snprintf(vsock_filter, 255, + "src_cid==%u && src_port==%u && dst_cid==%u && dst_port==%u && len!=0", + clock_context->remote_cid, clock_context->remote_port, + clock_context->local_cid, clock_context->local_port); + + clock_context->ftrace_params[3].set = strdup(vsock_filter); + return 1; +} + +static int clock_sync_x86_host_free(struct tracecmd_clock_sync *clock_context) +{ + free(clock_context->ftrace_params[3].set); + clock_context->ftrace_params[3].set = NULL; + return 1; +} + +static int clock_sync_x86_guest_init(struct tracecmd_clock_sync *clock_context) +{ + char vsock_filter[255]; + + snprintf(vsock_filter, 255, + "src_cid==%u && src_port==%u && dst_cid==%u && dst_port==%u && len!=0", + clock_context->local_cid, clock_context->local_port, + clock_context->remote_cid, clock_context->remote_port); + + clock_context->ftrace_params[3].set = strdup(vsock_filter); + return 1; +} + +static int clock_sync_x86_guest_free(struct tracecmd_clock_sync *clock_context) +{ + free(clock_context->ftrace_params[3].set); + clock_context->ftrace_params[3].set = NULL; + return 1; +} + +static int +get_events_in_page(struct tep_handle *tep, void *page, + int size, int cpu, struct tracecmd_time_sync_event **events, + int *events_count, int *events_size) +{ + struct tracecmd_time_sync_event *events_array = NULL; + struct tep_record *last_record = NULL; + struct tep_event *event = NULL; + struct tep_record *record; + int id, cnt = 0; + + if (size <= 0) + return 0; + + if (*events == NULL) { + *events = malloc(10*sizeof(struct tracecmd_time_sync_event)); + *events_size = 10; + *events_count = 0; + } + + while (true) { + event = NULL; + record = tracecmd_read_page_record(tep, page, size, + last_record); + if (!record) + break; + free_record(last_record); + id = tep_data_type(tep, record); + event = tep_data_event_from_type(tep, id); + if (event) { + if (*events_count >= *events_size) { + events_array = realloc(*events, + ((3*(*events_size))/2)* + sizeof(struct tracecmd_time_sync_event)); + if (events_array) { + *events = events_array; + (*events_size) = (((*events_size)*3)/2); + } + } + + if (*events_count < *events_size) { + (*events)[*events_count].ts = record->ts; + (*events)[*events_count].cpu = cpu; + (*events)[*events_count].id = id; + (*events)[*events_count].pid = tep_data_pid(tep, record); + (*events_count)++; + cnt++; + } + } + last_record = record; + } + free_record(last_record); + + return cnt; +} + +static int sync_events_cmp(const void *a, const void *b) +{ + const struct tracecmd_time_sync_event *ea = (const struct tracecmd_time_sync_event *)a; + const struct tracecmd_time_sync_event *eb = (const struct tracecmd_time_sync_event *)b; + + if (ea->ts > eb->ts) + return 1; + if (ea->ts < eb->ts) + return -1; + return 0; +} + +static int find_sync_events(struct tep_handle *pevent, + struct tracecmd_time_sync_event *recorded, + int rsize, struct tracecmd_time_sync_event *events) +{ + int i = 0, j = 0; + + while (i < rsize) { + if (!events[j].ts && events[j].id == recorded[i].id && + (events[j].pid < 0 || events[j].pid == recorded[i].pid)) { + events[j].cpu = recorded[i].cpu; + events[j].ts = recorded[i].ts; + j++; + } else if (j > 0 && events[j-1].id == recorded[i].id && + (events[j-1].pid < 0 || events[j-1].pid == recorded[i].pid)) { + events[j-1].cpu = recorded[i].cpu; + events[j-1].ts = recorded[i].ts; + } + i++; + } + return j; +} + +//#define TSYNC_RBUFFER_DEBUG +static int find_raw_events(struct tep_handle *tep, + struct buffer_instance *instance, + struct tracecmd_time_sync_event *events) +{ + struct tracecmd_time_sync_event *events_array = NULL; + int events_count = 0; + int events_size = 0; + unsigned int p_size; + char file[PATH_MAX]; + int ts = 0; + void *page; + char *path; + int fd; + int i; + int r; + + p_size = getpagesize(); +#ifdef TSYNC_RBUFFER_DEBUG + file = get_instance_file(instance, "trace"); + if (!file) + return ts; + { + char *buf = NULL; + FILE *fp; + size_t n; + int r; + + printf("Events:\n\r"); + fp = fopen(file, "r"); + while ((r = getline(&buf, &n, fp)) >= 0) { + + if (buf[0] != '#') + printf("%s", buf); + free(buf); + buf = NULL; + } + fclose(fp); + } + tracecmd_put_tracing_file(file); +#endif /* TSYNC_RBUFFER_DEBUG */ + path = get_instance_file(instance, "per_cpu"); + if (!path) + return ts; + + page = malloc(p_size); + if (!page) + die("Failed to allocate time_stamp info"); + for (i = 0; i < instance->cpu_count; i++) { + sprintf(file, "%s/cpu%d/trace_pipe_raw", path, i); + fd = open(file, O_RDONLY | O_NONBLOCK); + if (fd < 0) + continue; + do { + r = read(fd, page, p_size); + if (r > 0) { + get_events_in_page(tep, page, r, i, + &events_array, &events_count, + &events_size); + } + } while (r > 0); + close(fd); + } + qsort(events_array, events_count, sizeof(*events_array), sync_events_cmp); + r = find_sync_events(tep, events_array, events_count, events); +#ifdef TSYNC_RBUFFER_DEBUG + len = 0; + while (events[len].id) { + printf("Found %d @ cpu %d: %lld pid %d\n\r", + events[len].id, events[len].cpu, + events[len].ts, events[len].pid); + len++; + } +#endif + + free(events_array); + free(page); + + tracecmd_put_tracing_file(path); + return r; +} + +static int clock_sync_x86_host_find_events(struct tracecmd_clock_sync *clock, + int pid, + struct tracecmd_time_sync_event *event) +{ + int ret; + + clock->events[0].pid = pid; + ret = find_raw_events(clock->tep, clock->vinst, clock->events); + event->ts = clock->events[0].ts; + event->cpu = clock->events[0].cpu; + return ret; + +} + +static int clock_sync_x86_guest_find_events(struct tracecmd_clock_sync *clock, + int pid, + struct tracecmd_time_sync_event *event) +{ + int ret; + + ret = find_raw_events(clock->tep, clock->vinst, clock->events); + if (ret != clock->events_count) + return 0; + event->ts = clock->events[1].ts; + event->cpu = clock->events[0].cpu; + return 1; + +} + +static void tracecmd_clock_sync_reset(struct tracecmd_clock_sync *clock_context) +{ + int i = 0; + + while (clock_context->events[i].id) { + clock_context->events[i].cpu = 0; + clock_context->events[i].ts = 0; + clock_context->events[i].pid = -1; + i++; + } +} + +int tracecmd_clock_find_event(struct tracecmd_clock_sync *clock, int pid, + struct tracecmd_time_sync_event *event) +{ + int ret = 0; + int id; + + if (clock == NULL || + clock->clock_context_id >= CLOCK_CONTEXT_MAX) + return 0; + + id = clock->clock_context_id; + if (clock_sync[id].clock_sync_find_events) + ret = clock_sync[id].clock_sync_find_events(clock, pid, event); + + tracecmd_clock_sync_reset(clock); + return ret; +} + +static void clock_context_copy(struct tracecmd_clock_sync *clock_context, + struct tracecmd_ftrace_param *params, + struct tracecmd_event_descr *events) +{ + int i; + + i = 0; + while (params[i].file) + i++; + clock_context->ftrace_params = calloc(i+1, sizeof(struct tracecmd_ftrace_param)); + i = 0; + while (params[i].file) { + clock_context->ftrace_params[i].file = strdup(params[i].file); + if (params[i].set) + clock_context->ftrace_params[i].set = strdup(params[i].set); + if (params[i].reset) + clock_context->ftrace_params[i].reset = strdup(params[i].reset); + i++; + } + + i = 0; + while (events[i].name) + i++; + clock_context->events = calloc(i+1, sizeof(struct tracecmd_time_sync_event)); + clock_context->events_count = i; +} + +void trace_instance_reset(struct buffer_instance *vinst) +{ + write_instance_file(vinst, "trace", "\0", NULL); +} + +static struct buffer_instance * +clock_synch_create_instance(const char *clock, unsigned int cid) +{ + struct buffer_instance *vinst; + char inst_name[256]; + + snprintf(inst_name, 256, "clock_synch-%d", cid); + + vinst = create_instance(strdup(inst_name)); + tracecmd_init_instance(vinst); + vinst->cpu_count = tracecmd_local_cpu_count(); + tracecmd_make_instance(vinst); + trace_instance_reset(vinst); + if (clock) + vinst->clock = strdup(clock); + tracecmd_set_clock(vinst); + return vinst; +} + +static struct tep_handle *clock_synch_get_tep(struct buffer_instance *instance, + const char * const *systems) +{ + struct tep_handle *tep = NULL; + char *path; + + path = get_instance_dir(instance); + tep = tracecmd_local_events_system(path, systems); + tracecmd_put_tracing_file(path); + + tep_set_file_bigendian(tep, tracecmd_host_bigendian()); + tep_set_host_bigendian(tep, tracecmd_host_bigendian()); + + return tep; +} + +static void get_vsocket_params(int fd, unsigned int *lcid, unsigned int *lport, + unsigned int *rcid, unsigned int *rport) +{ + struct sockaddr_vm addr; + socklen_t addr_len = sizeof(addr); + + memset(&addr, 0, sizeof(addr)); + if (getsockname(fd, (struct sockaddr *)&addr, &addr_len)) + return; + if (addr.svm_family != AF_VSOCK) + return; + *lport = addr.svm_port; + *lcid = addr.svm_cid; + + memset(&addr, 0, sizeof(addr)); + addr_len = sizeof(addr); + if (getpeername(fd, (struct sockaddr *)&addr, &addr_len)) + return; + if (addr.svm_family != AF_VSOCK) + return; + *rport = addr.svm_port; + *rcid = addr.svm_cid; +} + +struct tracecmd_clock_sync* +tracecmd_clock_context_new(struct tracecmd_msg_handle *msg_handle, + const char *clock_str, + enum clock_sync_context id) +{ + struct tracecmd_clock_sync *clock_context; + struct tep_event *event; + unsigned int i = 0; + + switch (id) { +#ifdef VSOCK + case CLOCK_KVM_X86_VSOCK_HOST: + case CLOCK_KVM_X86_VSOCK_GUEST: + break; +#endif + default: /* not supported clock sync context */ + return NULL; + } + + if (id >= CLOCK_CONTEXT_MAX || NULL == msg_handle) + return NULL; + clock_context = calloc(1, sizeof(struct tracecmd_clock_sync)); + if (!clock_context) + return NULL; + clock_context->clock_context_id = id; + clock_context_copy(clock_context, + clock_sync[id].ftrace_params, clock_sync[id].events); + + get_vsocket_params(msg_handle->fd, + &clock_context->local_cid, + &clock_context->local_port, + &clock_context->remote_cid, + &clock_context->remote_port); + + if (clock_sync[id].clock_sync_init) + clock_sync[id].clock_sync_init(clock_context); + + clock_context->vinst = clock_synch_create_instance(clock_str, clock_context->remote_cid); + clock_context->tep = clock_synch_get_tep(clock_context->vinst, + clock_sync[id].systems); + i = 0; + while (clock_sync[id].events[i].name) { + event = tep_find_event_by_name(clock_context->tep, + clock_sync[id].events[i].system, + clock_sync[id].events[i].name); + if (!event) + break; + clock_context->events[i].id = event->id; + i++; + } +#ifdef TSYNC_DEBUG + clock_context->debug_fd = -1; +#endif + + return clock_context; + +} + +void tracecmd_clock_context_free(struct buffer_instance *instance) +{ + int i; + + if (instance->clock_sync == NULL || + instance->clock_sync->clock_context_id >= CLOCK_CONTEXT_MAX) + return; + if (clock_sync[instance->clock_sync->clock_context_id].clock_sync_free) + clock_sync[instance->clock_sync->clock_context_id].clock_sync_free(instance->clock_sync); + + i = 0; + while (instance->clock_sync->ftrace_params[i].file) { + free(instance->clock_sync->ftrace_params[i].file); + free(instance->clock_sync->ftrace_params[i].set); + free(instance->clock_sync->ftrace_params[i].reset); + i++; + } + free(instance->clock_sync->ftrace_params); + free(instance->clock_sync->events); + tracecmd_remove_instance(instance->clock_sync->vinst); + /* todo: clean up the instance */ + tep_free(instance->clock_sync->tep); + + free(instance->clock_sync->offsets); + free(instance->clock_sync->times); +#ifdef TSYNC_DEBUG + if (instance->clock_sync->debug_fd >= 0) { + close(instance->clock_sync->debug_fd); + instance->clock_sync->debug_fd = -1; + } +#endif + free(instance->clock_sync); + instance->clock_sync = NULL; +} + +bool tracecmd_time_sync_check(void) +{ +#ifdef VSOCK + return true; +#endif + return false; +} + +void sync_time_with_host_v3(struct buffer_instance *instance) +{ + long long timestamp = 0; + long long offset = 0; + + if (!instance->do_tsync) + return; + + if (instance->clock_sync == NULL) + instance->clock_sync = tracecmd_clock_context_new(instance->msg_handle, + instance->clock, CLOCK_KVM_X86_VSOCK_GUEST); + + tracecmd_msg_snd_time_sync(instance->msg_handle, instance->clock_sync, + &offset, ×tamp); + if (!offset && !timestamp) + warning("Failed to synchronize timestamps with the host"); +} + +void sync_time_with_guest_v3(struct buffer_instance *instance) +{ + long long timestamp = 0; + long long offset = 0; + long long *sync_array_ts; + long long *sync_array_offs; + + if (!instance->do_tsync) + return; + + if (instance->clock_sync == NULL) + instance->clock_sync = tracecmd_clock_context_new(instance->msg_handle, + top_instance.clock, CLOCK_KVM_X86_VSOCK_HOST); + + tracecmd_msg_rcv_time_sync(instance->msg_handle, + instance->clock_sync, &offset, ×tamp); + + if (!offset && !timestamp) { + warning("Failed to synchronize timestamps with guest %s", + instance->name); + return; + } + + sync_array_ts = realloc(instance->time_sync_ts, + (instance->time_sync_count+1)*sizeof(long long)); + sync_array_offs = realloc(instance->time_sync_offsets, + (instance->time_sync_count+1)*sizeof(long long)); + + if (sync_array_ts && sync_array_offs) { + sync_array_ts[instance->time_sync_count] = timestamp; + sync_array_offs[instance->time_sync_count] = offset; + instance->time_sync_count++; + instance->time_sync_ts = sync_array_ts; + instance->time_sync_offsets = sync_array_offs; + + } else { + free(sync_array_ts); + free(sync_array_offs); + } + +} + +static void set_clock_synch_events(struct buffer_instance *instance, + struct tracecmd_ftrace_param *params, + bool enable) +{ + int i = 0; + + if (!enable) + write_tracing_on(instance, 0); + + while (params[i].file) { + if (enable && params[i].set) { + write_instance_file(instance, params[i].file, + params[i].set, NULL); + } + if (!enable && params[i].reset) + write_instance_file(instance, params[i].file, + params[i].reset, NULL); + i++; + } + + if (enable) + write_tracing_on(instance, 1); +} + +int tracecmd_clock_get_peer(struct tracecmd_clock_sync *clock_context, + unsigned int *remote_cid, unsigned int *remote_port) +{ + if (!clock_context) + return 0; + if (remote_cid) + *remote_cid = clock_context->remote_cid; + if (remote_port) + *remote_cid = clock_context->remote_port; + return 1; +} + +void tracecmd_clock_synch_enable(struct tracecmd_clock_sync *clock_context) +{ + set_clock_synch_events(clock_context->vinst, + clock_context->ftrace_params, true); +} + +void tracecmd_clock_synch_disable(struct tracecmd_clock_sync *clock_context) +{ + set_clock_synch_events(clock_context->vinst, + clock_context->ftrace_params, false); +} + +int tracecmd_clock_synch_calc(struct tracecmd_clock_sync *clock_context, + long long *offset_ret, long long *time_ret) +{ + int i, j = 0; + long long av, tresch, offset = 0, time = 0; + + if (!clock_context || !clock_context->probes_count) + return 0; + av = clock_context->offset_av / clock_context->probes_count; + tresch = (long long)((clock_context->offset_max - clock_context->offset_min)/10); + + for (i = 0; i < clock_context->probes_count; i++) { + /* filter the offsets with deviation up to 10% */ + if (llabs(clock_context->offsets[i] - av) < tresch) { + offset += clock_context->offsets[i]; + j++; + } + } + if (j) + offset /= (long long)j; + + tresch = 0; + for (i = 0; i < clock_context->probes_count; i++) { + if ((!tresch || tresch > llabs(offset-clock_context->offsets[i]))) { + tresch = llabs(offset-clock_context->offsets[i]); + time = clock_context->times[i]; + } + } + if (offset_ret) + *offset_ret = offset; + if (time_ret) + *time_ret = time; +#ifdef TSYNC_DEBUG + printf("\n calculated offset: %lld, %d/%d probes\n\r", + *offset_ret, clock_context->probes_count, + clock_context->probes_count + clock_context->bad_probes); +#endif + return 1; +} + +void tracecmd_clock_synch_calc_reset(struct tracecmd_clock_sync *clock_context) +{ + if (!clock_context) + return; + + clock_context->probes_count = 0; + clock_context->bad_probes = 0; + clock_context->offset_av = 0; + clock_context->offset_min = 0; + clock_context->offset_max = 0; +#ifdef TSYNC_DEBUG + if (clock_context->debug_fd >= 0) { + close(clock_context->debug_fd); + clock_context->debug_fd = -1; + } +#endif + +} + +void tracecmd_clock_synch_calc_probe(struct tracecmd_clock_sync *clock_context, + long long ts_local, long long ts_remote) +{ + int count; +#ifdef TSYNC_DEBUG + char buff[256]; +#endif + + if (!clock_context || !ts_local || !ts_remote) + return; + if (!ts_local || !ts_remote) { + clock_context->bad_probes++; + return; + } + + if (!clock_context->offsets && !clock_context->times) { + clock_context->offsets = calloc(10, sizeof(long long)); + clock_context->times = calloc(10, sizeof(long long)); + clock_context->probes_size = 10; + } + + if (clock_context->probes_size == clock_context->probes_count) { + clock_context->probes_size = (3*clock_context->probes_size)/2; + clock_context->offsets = realloc(clock_context->offsets, + clock_context->probes_size * + sizeof(long long)); + clock_context->times = realloc(clock_context->times, + clock_context->probes_size* + sizeof(long long)); + } + + if (!clock_context->offsets || !clock_context->times) { + clock_context->probes_size = 0; + tracecmd_clock_synch_calc_reset(clock_context); + return; + } +#ifdef TSYNC_DEBUG + if (clock_context->debug_fd < 0) { + sprintf(buff, "s-cid%d.txt", clock_context->remote_cid); + clock_context->debug_fd = open(buff, O_CREAT|O_WRONLY|O_TRUNC, 0644); + } +#endif + count = clock_context->probes_count; + clock_context->probes_count++; + clock_context->offsets[count] = ts_remote - ts_local; + clock_context->times[count] = ts_local; + clock_context->offset_av += clock_context->offsets[count]; + + if (!clock_context->offset_min || + clock_context->offset_min > llabs(clock_context->offsets[count])) + clock_context->offset_min = llabs(clock_context->offsets[count]); + if (!clock_context->offset_max || + clock_context->offset_max < llabs(clock_context->offsets[count])) + clock_context->offset_max = llabs(clock_context->offsets[count]); +#ifdef TSYNC_DEBUG + sprintf(buff, "%lld %lld\n", ts_local, ts_remote); + write(clock_context->debug_fd, buff, strlen(buff)); +#endif + +}