From patchwork Wed Apr 14 14:39:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 12203005 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F58AC433B4 for ; Wed, 14 Apr 2021 14:41:52 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6A27361029 for ; Wed, 14 Apr 2021 14:41:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A27361029 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=ish8/ZEj1dGp/TaEBQfi/DPbMb9QBT779jNxrwiHz0k=; b=hZWI98YOB3SU4m33F4YPG4OaME 66DelwbnmzLjVBIgGfI8yiMApRr/Huh4MJz+xvn28Z8r95JH1+v+rlhCM8BFP8JFmeiaxblWnwpYC 2O3h0P4cx/gahl/Aufj6qLMJ73ZJogCE+lNW7uPI4pCxsgVrOg5GIiJBfhaneszLkQSx7foUtD+3V 3wF4Z1fGtzePANwqi8NuPCnK8jgG3zCN62dwxeZye2rAII/aUxtvmPMYVUS/rkIrZfjurbfk1GrlL zPRBT0zSJbEFODwPuI1DOdjWYLbPIu1KlSYptnDyCB2VV6XJTYhobuFMWgZEX4wgMN4SQls5tKKOW rgV1yYwA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lWggQ-00Cudl-Jx; Wed, 14 Apr 2021 14:39:59 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lWggJ-00CudM-QH for linux-arm-kernel@desiato.infradead.org; Wed, 14 Apr 2021 14:39:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=d5pXKZxWke2Fj5to2hGwfTu4sLe1LayNa8h0IMudmL4=; b=w5nLNxuv7Psyfcgib2CLsz/xHM YJR1s3pAEsOWzvSN/Qy71mXSgYNNx9uoFP0qOw0g+XbPkcB/px87ZeFjozqlNZxDHa3E/8RSxNFV1 EZjbuPwjwLrIZqeagkIM55emmxY0SeReN77y9aYgm8IjFpgRS5N7Jt8hIXrZ6BwHYb6dry0JTzKFr iTNJeJvbPhjvGVk8AyGIbX4pwVGR5rGekeuS3cQobX9eixeECMQFNpep3ZCaxFELBERrtHxvsftDm XX6olZJo38gDaMvMgaRnc6rtV/xL6Tnnu6QCOEjmymjWumbO9BztBjqnRgqgtEIBXetj9GwkDxMfT uxCbSxvg==; Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lWggF-007pjo-LI for linux-arm-kernel@lists.infradead.org; Wed, 14 Apr 2021 14:39:49 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 077C7113E; Wed, 14 Apr 2021 07:39:40 -0700 (PDT) Received: from e121896.arm.com (unknown [10.57.47.202]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 759063F694; Wed, 14 Apr 2021 07:39:37 -0700 (PDT) From: James Clark To: coresight@lists.linaro.org Cc: al.grant@arm.com, branislav.rankov@arm.com, denik@chromium.org, suzuki.poulose@arm.com, James Clark , Mike Leach , Leo Yan , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , John Garry , Will Deacon , Mathieu Poirier , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] perf cs-etm: Refactor timestamp variable names Date: Wed, 14 Apr 2021 17:39:18 +0300 Message-Id: <20210414143919.12605-1-james.clark@arm.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210414_073947_818775_48F18A99 X-CRM114-Status: GOOD ( 23.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Remove ambiguity in variable names relating to timestamps. A later commit will save the sample kernel timestamp in one of the etm structs, so name all elements appropriately to avoid confusion. This is also removes some ambiguity arising from the fact that the --timestamp argument to perf record refers to sample kernel timestamps, and the /timestamp/ event modifier refers to etm timestamps, so the term is overloaded. Signed-off-by: James Clark Reviewed-by: Mathieu Poirier --- .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 18 ++++---- tools/perf/util/cs-etm.c | 42 +++++++++---------- tools/perf/util/cs-etm.h | 4 +- 3 files changed, 31 insertions(+), 33 deletions(-) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 059bcec3f651..055cb93eca59 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -276,13 +276,13 @@ cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq, const uint8_t trace_chan_id) { /* No timestamp packet has been received, nothing to do */ - if (!packet_queue->timestamp) + if (!packet_queue->etm_timestamp) return OCSD_RESP_CONT; - packet_queue->timestamp = packet_queue->next_timestamp; + packet_queue->etm_timestamp = packet_queue->next_etm_timestamp; /* Estimate the timestamp for the next range packet */ - packet_queue->next_timestamp += packet_queue->instr_count; + packet_queue->next_etm_timestamp += packet_queue->instr_count; packet_queue->instr_count = 0; /* Tell the front end which traceid_queue needs attention */ @@ -308,8 +308,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, * Function do_soft_timestamp() will report the value to the front end, * hence asking the decoder to keep decoding rather than stopping. */ - if (packet_queue->timestamp) { - packet_queue->next_timestamp = elem->timestamp; + if (packet_queue->etm_timestamp) { + packet_queue->next_etm_timestamp = elem->timestamp; return OCSD_RESP_CONT; } @@ -320,8 +320,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, * which instructions started by subtracting the number of instructions * executed to the timestamp. */ - packet_queue->timestamp = elem->timestamp - packet_queue->instr_count; - packet_queue->next_timestamp = elem->timestamp; + packet_queue->etm_timestamp = elem->timestamp - packet_queue->instr_count; + packet_queue->next_etm_timestamp = elem->timestamp; packet_queue->instr_count = 0; /* Tell the front end which traceid_queue needs attention */ @@ -334,8 +334,8 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, static void cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue) { - packet_queue->timestamp = 0; - packet_queue->next_timestamp = 0; + packet_queue->etm_timestamp = 0; + packet_queue->next_etm_timestamp = 0; packet_queue->instr_count = 0; } diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 7e63e7dedc33..c25da2ffa8f3 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -38,8 +38,6 @@ #include #include "util/synthetic-events.h" -#define MAX_TIMESTAMP (~0ULL) - struct cs_etm_auxtrace { struct auxtrace auxtrace; struct auxtrace_queues queues; @@ -86,7 +84,7 @@ struct cs_etm_queue { struct cs_etm_decoder *decoder; struct auxtrace_buffer *buffer; unsigned int queue_nr; - u8 pending_timestamp; + u8 pending_timestamp_chan_id; u64 offset; const unsigned char *buf; size_t buf_len, buf_used; @@ -208,7 +206,7 @@ void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq, * be more than one channel per cs_etm_queue, we need to specify * what traceID queue needs servicing. */ - etmq->pending_timestamp = trace_chan_id; + etmq->pending_timestamp_chan_id = trace_chan_id; } static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq, @@ -216,22 +214,22 @@ static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq, { struct cs_etm_packet_queue *packet_queue; - if (!etmq->pending_timestamp) + if (!etmq->pending_timestamp_chan_id) return 0; if (trace_chan_id) - *trace_chan_id = etmq->pending_timestamp; + *trace_chan_id = etmq->pending_timestamp_chan_id; packet_queue = cs_etm__etmq_get_packet_queue(etmq, - etmq->pending_timestamp); + etmq->pending_timestamp_chan_id); if (!packet_queue) return 0; /* Acknowledge pending status */ - etmq->pending_timestamp = 0; + etmq->pending_timestamp_chan_id = 0; /* See function cs_etm_decoder__do_{hard|soft}_timestamp() */ - return packet_queue->timestamp; + return packet_queue->etm_timestamp; } static void cs_etm__clear_packet_queue(struct cs_etm_packet_queue *queue) @@ -814,7 +812,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, int ret = 0; unsigned int cs_queue_nr; u8 trace_chan_id; - u64 timestamp; + u64 etm_timestamp; struct cs_etm_queue *etmq = queue->priv; if (list_empty(&queue->head) || etmq) @@ -854,7 +852,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, /* * Run decoder on the trace block. The decoder will stop when - * encountering a timestamp, a full packet queue or the end of + * encountering an ETM timestamp, a full packet queue or the end of * trace for that block. */ ret = cs_etm__decode_data_block(etmq); @@ -865,10 +863,10 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, * Function cs_etm_decoder__do_{hard|soft}_timestamp() does all * the timestamp calculation for us. */ - timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); + etm_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); /* We found a timestamp, no need to continue. */ - if (timestamp) + if (etm_timestamp) break; /* @@ -892,7 +890,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, * queue and will be processed in cs_etm__process_queues(). */ cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id); - ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); + ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, etm_timestamp); out: return ret; } @@ -2221,7 +2219,7 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) int ret = 0; unsigned int cs_queue_nr, queue_nr; u8 trace_chan_id; - u64 timestamp; + u64 etm_timestamp; struct auxtrace_queue *queue; struct cs_etm_queue *etmq; struct cs_etm_traceid_queue *tidq; @@ -2283,9 +2281,9 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) if (ret) goto out; - timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); + etm_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); - if (!timestamp) { + if (!etm_timestamp) { /* * Function cs_etm__decode_data_block() returns when * there is no more traces to decode in the current @@ -2308,7 +2306,7 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) * this queue/traceID. */ cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id); - ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); + ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, etm_timestamp); } out: @@ -2380,7 +2378,7 @@ static int cs_etm__process_event(struct perf_session *session, struct perf_tool *tool) { int err = 0; - u64 timestamp; + u64 sample_kernel_timestamp; struct cs_etm_auxtrace *etm = container_of(session->auxtrace, struct cs_etm_auxtrace, auxtrace); @@ -2394,11 +2392,11 @@ static int cs_etm__process_event(struct perf_session *session, } if (sample->time && (sample->time != (u64) -1)) - timestamp = sample->time; + sample_kernel_timestamp = sample->time; else - timestamp = 0; + sample_kernel_timestamp = 0; - if (timestamp || etm->timeless_decoding) { + if (sample_kernel_timestamp || etm->timeless_decoding) { err = cs_etm__update_queues(etm); if (err) return err; diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 36428918411e..b300f6fa19cc 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -171,8 +171,8 @@ struct cs_etm_packet_queue { u32 head; u32 tail; u32 instr_count; - u64 timestamp; - u64 next_timestamp; + u64 etm_timestamp; + u64 next_etm_timestamp; struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER]; }; From patchwork Wed Apr 14 14:39:19 2021 Content-Type: text/plain; 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Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lWggH-007pjr-7Y for linux-arm-kernel@lists.infradead.org; Wed, 14 Apr 2021 14:39:50 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1875A11D4; Wed, 14 Apr 2021 07:39:43 -0700 (PDT) Received: from e121896.arm.com (unknown [10.57.47.202]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 875223F694; Wed, 14 Apr 2021 07:39:40 -0700 (PDT) From: James Clark To: coresight@lists.linaro.org Cc: al.grant@arm.com, branislav.rankov@arm.com, denik@chromium.org, suzuki.poulose@arm.com, James Clark , Mike Leach , Leo Yan , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , John Garry , Will Deacon , Mathieu Poirier , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] perf cs-etm: Set time on synthesised samples to preserve ordering Date: Wed, 14 Apr 2021 17:39:19 +0300 Message-Id: <20210414143919.12605-2-james.clark@arm.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210414143919.12605-1-james.clark@arm.com> References: <20210414143919.12605-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210414_073949_387690_822175E8 X-CRM114-Status: GOOD ( 15.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The following attribute is set when synthesising samples in timed decoding mode: attr.sample_type |= PERF_SAMPLE_TIME; This results in new samples that appear to have timestamps but because we don't assign any timestamps to the samples, when the resulting inject file is opened again, the synthesised samples will be on the wrong side of the MMAP or COMM events. For example this results in the samples being associated with the perf binary, rather than the target of the record: perf record -e cs_etm/@tmc_etr0/u top perf inject -i perf.data -o perf.inject --itrace=i100il perf report -i perf.inject Where 'Command' == perf should show as 'top': # Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles # ........ ....... .................... ...................... ...................... .................. # 31.08% perf [unknown] [.] 0x000000000040c3f8 [.] 0x000000000040c3e8 - If the perf.data file is opened directly with perf, without the inject step, then this already works correctly because the events are synthesised after the COMM and MMAP events and no second sorting happens. Re-sorting only happens when opening the perf.inject file for the second time so timestamps are needed. Using the timestamp from the AUX record mirrors the current behaviour when opening directly with perf, because the events are generated on the call to cs_etm__process_queues(). Signed-off-by: James Clark Co-developed-by: Al Grant Signed-off-by: Al Grant Acked-by: Suzuki K Poulos Reviewed-by: Leo Yan Reviewed-by: Mathieu Poirier --- tools/perf/util/cs-etm.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index c25da2ffa8f3..d0fa9dce47f1 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -54,6 +54,7 @@ struct cs_etm_auxtrace { u8 sample_instructions; int num_cpu; + u64 latest_kernel_timestamp; u32 auxtrace_type; u64 branches_sample_type; u64 branches_id; @@ -1192,6 +1193,8 @@ static int cs_etm__synth_instruction_sample(struct cs_etm_queue *etmq, event->sample.header.misc = cs_etm__cpu_mode(etmq, addr); event->sample.header.size = sizeof(struct perf_event_header); + if (!etm->timeless_decoding) + sample.time = etm->latest_kernel_timestamp; sample.ip = addr; sample.pid = tidq->pid; sample.tid = tidq->tid; @@ -1248,6 +1251,8 @@ static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq, event->sample.header.misc = cs_etm__cpu_mode(etmq, ip); event->sample.header.size = sizeof(struct perf_event_header); + if (!etm->timeless_decoding) + sample.time = etm->latest_kernel_timestamp; sample.ip = ip; sample.pid = tidq->pid; sample.tid = tidq->tid; @@ -2412,9 +2417,10 @@ static int cs_etm__process_event(struct perf_session *session, else if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) return cs_etm__process_switch_cpu_wide(etm, event); - if (!etm->timeless_decoding && - event->header.type == PERF_RECORD_AUX) + if (!etm->timeless_decoding && event->header.type == PERF_RECORD_AUX) { + etm->latest_kernel_timestamp = sample_kernel_timestamp; return cs_etm__process_queues(etm); + } return 0; }