From patchwork Thu Jun 16 08:44:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Bristot de Oliveira X-Patchwork-Id: 12883557 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB041C43334 for ; Thu, 16 Jun 2022 08:46:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359769AbiFPIqQ (ORCPT ); Thu, 16 Jun 2022 04:46:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359805AbiFPIqA (ORCPT ); Thu, 16 Jun 2022 04:46:00 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E3315DBCD; Thu, 16 Jun 2022 01:45:55 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D67F2B81E20; Thu, 16 Jun 2022 08:45:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F995C3411F; Thu, 16 Jun 2022 08:45:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1655369152; bh=ZJ0brquACtNcXCIAgCRgNB+aJ/fU2CSwf1pEP1xdS3c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rmpY9+pOtMmQn4Yy+VrFIeWB31DRRL5kf9pHv2pn3dg9ADHcEztUGaTGnuSDtJ6FK OmGgKEoJYtkHsedir14+rjJXSGEE4KnNz8BPq7sSioUaiR2y8rcdK4v5sJxdtFle0e jQ+8CBDW5LNum7z8NWYzn7INcYejQJGJC8Y7CqVWINIQye2LQf6qlf/1CSMbaY7oDi /BNuZp2SAHQALxiY3qpXxM0+RcrsqEKps5uDPQgcPREYnMNYZS3p8QJnprDlfTA8jw 4MOnuKBznzsFdKwX3X8Xe0suHsarKBdbUNesxloU8EcJex0Dmkgfqk6FfjjXYEVRGg iYEtuB5wBfVAQ== From: Daniel Bristot de Oliveira To: Steven Rostedt Cc: Daniel Bristot de Oliveira , Wim Van Sebroeck , Guenter Roeck , Jonathan Corbet , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , Will Deacon , Catalin Marinas , Marco Elver , Dmitry Vyukov , "Paul E. McKenney" , Shuah Khan , Gabriele Paoloni , Juri Lelli , Clark Williams , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org Subject: [PATCH V4 08/20] rv/monitor: Add the wip monitor skeleton created by dot2k Date: Thu, 16 Jun 2022 10:44:50 +0200 Message-Id: <6559fb9064f683fda469849549c72607c0f2ae5b.1655368610.git.bristot@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org This is the direct output this command line: $ dot2k -d ~/wip.dot -t per_cpu with wip.dot as: ----- %< ----- digraph state_automaton { center = true; size = "7,11"; rankdir = LR; {node [shape = circle] "non_preemptive"}; {node [shape = plaintext, style=invis, label=""] "__init_preemptive"}; {node [shape = doublecircle] "preemptive"}; {node [shape = circle] "preemptive"}; "__init_preemptive" -> "preemptive"; "non_preemptive" [label = "non_preemptive"]; "non_preemptive" -> "non_preemptive" [ label = "sched_waking" ]; "non_preemptive" -> "preemptive" [ label = "preempt_enable" ]; "preemptive" [label = "preemptive"]; "preemptive" -> "non_preemptive" [ label = "preempt_disable" ]; { rank = min ; "__init_preemptive"; "preemptive"; } } ----- >% ----- This model is broken because preempt_disable_notrace(). It is broken on purpose to test the reactors. It does not compile because it lacks the instrumentation, which will be add next. Cc: Wim Van Sebroeck Cc: Guenter Roeck Cc: Jonathan Corbet Cc: Steven Rostedt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Will Deacon Cc: Catalin Marinas Cc: Marco Elver Cc: Dmitry Vyukov Cc: "Paul E. McKenney" Cc: Shuah Khan Cc: Gabriele Paoloni Cc: Juri Lelli Cc: Clark Williams Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira --- kernel/trace/rv/monitors/wip/wip.c | 112 +++++++++++++++++++++++++++++ kernel/trace/rv/monitors/wip/wip.h | 38 ++++++++++ 2 files changed, 150 insertions(+) create mode 100644 kernel/trace/rv/monitors/wip/wip.c create mode 100644 kernel/trace/rv/monitors/wip/wip.h diff --git a/kernel/trace/rv/monitors/wip/wip.c b/kernel/trace/rv/monitors/wip/wip.c new file mode 100644 index 000000000000..08950e09b823 --- /dev/null +++ b/kernel/trace/rv/monitors/wip/wip.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include + +#define MODULE_NAME "wip" + +/* + * XXX: include required tracepoint headers, e.g., + * #include + */ +#include + +/* + * This is the self-generated part of the monitor. Generally, there is no need + * to touch this section. + */ +#include "wip.h" + +/* + * Declare the deterministic automata monitor. + * + * The rv monitor reference is needed for the monitor declaration. + */ +struct rv_monitor rv_wip; +DECLARE_DA_MON_PER_CPU(wip, char); + +/* + * This is the instrumentation part of the monitor. + * + * This is the section where manual work is required. Here the kernel events + * are translated into model's event. + * + */ +static void handle_preempt_disable(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(preempt_disable_wip); +} + +static void handle_preempt_enable(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(preempt_enable_wip); +} + +static void handle_sched_waking(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(sched_waking_wip); +} + +static int start_wip(void) +{ + int retval; + + retval = da_monitor_init_wip(); + if (retval) + return retval; + + rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_disable); + rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_enable); + rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_sched_waking); + + return 0; +} + +static void stop_wip(void) +{ + rv_wip.enabled = 0; + + rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_disable); + rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_enable); + rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_sched_waking); + + da_monitor_destroy_wip(); +} + +/* + * This is the monitor register section. + */ +struct rv_monitor rv_wip = { + .name = "wip", + .description = "auto-generated wip", + .start = start_wip, + .stop = stop_wip, + .reset = da_monitor_reset_all_wip, + .enabled = 0, +}; + +int register_wip(void) +{ + rv_register_monitor(&rv_wip); + return 0; +} + +void unregister_wip(void) +{ + if (rv_wip.enabled) + stop_wip(); + + rv_unregister_monitor(&rv_wip); +} + +module_init(register_wip); +module_exit(unregister_wip); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("dot2k: auto-generated"); +MODULE_DESCRIPTION("wip"); diff --git a/kernel/trace/rv/monitors/wip/wip.h b/kernel/trace/rv/monitors/wip/wip.h new file mode 100644 index 000000000000..3055ea331706 --- /dev/null +++ b/kernel/trace/rv/monitors/wip/wip.h @@ -0,0 +1,38 @@ +enum states_wip { + preemptive_wip = 0, + non_preemptive_wip, + state_max_wip +}; + +enum events_wip { + preempt_disable_wip = 0, + preempt_enable_wip, + sched_waking_wip, + event_max_wip +}; + +struct automaton_wip { + char *state_names[state_max_wip]; + char *event_names[event_max_wip]; + char function[state_max_wip][event_max_wip]; + char initial_state; + char final_states[state_max_wip]; +}; + +struct automaton_wip automaton_wip = { + .state_names = { + "preemptive", + "non_preemptive" + }, + .event_names = { + "preempt_disable", + "preempt_enable", + "sched_waking" + }, + .function = { + { non_preemptive_wip, -1, -1 }, + { -1, preemptive_wip, non_preemptive_wip }, + }, + .initial_state = preemptive_wip, + .final_states = { 1, 0 }, +};