From patchwork Wed Jul 26 12:16:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ze Gao X-Patchwork-Id: 13327929 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 3E74EC001E0 for ; Wed, 26 Jul 2023 12:16:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233509AbjGZMQi (ORCPT ); Wed, 26 Jul 2023 08:16:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232844AbjGZMQh (ORCPT ); Wed, 26 Jul 2023 08:16:37 -0400 Received: from mail-il1-x135.google.com (mail-il1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CCDB310F6; Wed, 26 Jul 2023 05:16:35 -0700 (PDT) Received: by mail-il1-x135.google.com with SMTP id e9e14a558f8ab-3464c774f23so30945965ab.1; Wed, 26 Jul 2023 05:16:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690373795; x=1690978595; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=SNtS9F3WTNQE3HkYohBKkdu8+BM/TX/VXbV+TW+htq8=; b=JDgd3f78clfCjnhOza+o4KM7mE7U7JJXcZPDO6I+F5KHhmnche6Fu+P1BIrzPyj7rw VZPW4B+n19JC+Xc9SvSmJkKmHaUlMbTBBQroCIU645dx+8XPnHp9Hpb334uueMjH9UBg J+x9/Pts58rKtA1B3ElJrj34ReusbA47AljbgwX7/ZO3Qj+2jO5r9xuy/o7Yf2LlRbAF WiCny5ApTLDgZ99KZC4++dgMijymsaGoesFv6Vegkr+au3GmLNRbECFYa1/227o5S26z CVgirl4WRdDNcKUpU8xsNrF6FnaGtulvkpQdQ8Ncb/djvhyitButfXYUfInPbRE0AH0O 2nFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690373795; x=1690978595; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=SNtS9F3WTNQE3HkYohBKkdu8+BM/TX/VXbV+TW+htq8=; b=SWcXPyEfU7XYJ4z8Grvctv+AWPyYhG9A3UVQMRFv3lg3/PkAAZ4aUJ3mjmrPTJ4rq2 s4MavVV+O25o9eu2AT36f8GP/hgXL/vLAeer+3AzqN+uuQQbRhmLO9C1DcsReilxUefB CFPnCsKVg/VHyBnMv6E4bY+gReYoxZlzAlrtWJanO0UfOVGvmb5nnYK1lwCabsBpU/7m +DjKEXtkI4yR68U0xO89KN1rAqAHhBcqNO3f+JA/q2plIiX2VmUA379DoJceTlDZpL22 Ed3vGuB0Ls04xWfkh/PrDcxSmMmYMsB0FSkWruaTVXNWfqHwLB5sBL6VhtomsLsfthXv Qheg== X-Gm-Message-State: ABy/qLaniIItj9NR5ibXOtbnJuKQg9ns0wgbGTMyfWaTdG/aTfKsC9cE FoF/DTgZ6jTjCMONHtcCtY8= X-Google-Smtp-Source: APBJJlG6c1z+CkusDB+L0vw/xEMbf2SJ2s759KnIa3516NN53tLp0ztmHEnXwSdrixF4HGOYAjVl3A== X-Received: by 2002:a92:c56d:0:b0:348:b07e:fd9e with SMTP id b13-20020a92c56d000000b00348b07efd9emr2096579ilj.16.1690373795086; Wed, 26 Jul 2023 05:16:35 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.25]) by smtp.googlemail.com with ESMTPSA id ms19-20020a17090b235300b00263f446d432sm1172880pjb.43.2023.07.26.05.16.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jul 2023 05:16:34 -0700 (PDT) From: Ze Gao X-Google-Original-From: Ze Gao To: Peter Zijlstra , Steven Rostedt , Namhyung Kim Cc: Adrian Hunter , Alexander Shishkin , Arnaldo Carvalho de Melo , Ian Rogers , Ingo Molnar , Jiri Olsa , Mark Rutland , Masami Hiramatsu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org, Ze Gao Subject: [RFC PATCH v2 2/3] perf sched: use the new prev_state_char instead in tracepoint sched_switch Date: Wed, 26 Jul 2023 20:16:17 +0800 Message-Id: <20230726121618.19198-3-zegao@tencent.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230726121618.19198-1-zegao@tencent.com> References: <20230726121618.19198-1-zegao@tencent.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-kernel@vger.kernel.org Since the sched_switch tracepoint introduces a new variable to report sched-out task state in symbolic char, we switch to use that instead to spare from knowing internal implementations in kernel. Signed-off-by: Ze Gao --- tools/perf/builtin-sched.c | 57 +++++++------------------------------- 1 file changed, 10 insertions(+), 47 deletions(-) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index cc4ba506e119..e3b31d526bc8 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -92,24 +92,6 @@ struct sched_atom { struct task_desc *wakee; }; -#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP" - -/* task state bitmask, copied from include/linux/sched.h */ -#define TASK_RUNNING 0 -#define TASK_INTERRUPTIBLE 1 -#define TASK_UNINTERRUPTIBLE 2 -#define __TASK_STOPPED 4 -#define __TASK_TRACED 8 -/* in tsk->exit_state */ -#define EXIT_DEAD 16 -#define EXIT_ZOMBIE 32 -#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD) -/* in tsk->state again */ -#define TASK_DEAD 64 -#define TASK_WAKEKILL 128 -#define TASK_WAKING 256 -#define TASK_PARKED 512 - enum thread_state { THREAD_SLEEPING = 0, THREAD_WAIT_CPU, @@ -266,7 +248,7 @@ struct thread_runtime { u64 total_preempt_time; u64 total_delay_time; - int last_state; + char last_state; char shortname[3]; bool comm_changed; @@ -436,7 +418,7 @@ static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *t } static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task, - u64 timestamp, u64 task_state __maybe_unused) + u64 timestamp, char task_state __maybe_unused) { struct sched_atom *event = get_new_event(task, timestamp); @@ -860,7 +842,7 @@ static int replay_switch_event(struct perf_sched *sched, *next_comm = evsel__strval(evsel, sample, "next_comm"); const u32 prev_pid = evsel__intval(evsel, sample, "prev_pid"), next_pid = evsel__intval(evsel, sample, "next_pid"); - const u64 prev_state = evsel__intval(evsel, sample, "prev_state"); + const char prev_state = evsel__intval(evsel, sample, "prev_state_char"); struct task_desc *prev, __maybe_unused *next; u64 timestamp0, timestamp = sample->time; int cpu = sample->cpu; @@ -1050,13 +1032,6 @@ static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread) return 0; } -static char sched_out_state(u64 prev_state) -{ - const char *str = TASK_STATE_TO_CHAR_STR; - - return str[prev_state]; -} - static int add_sched_out_event(struct work_atoms *atoms, char run_state, @@ -1132,7 +1107,7 @@ static int latency_switch_event(struct perf_sched *sched, { const u32 prev_pid = evsel__intval(evsel, sample, "prev_pid"), next_pid = evsel__intval(evsel, sample, "next_pid"); - const u64 prev_state = evsel__intval(evsel, sample, "prev_state"); + const char prev_state = evsel__intval(evsel, sample, "prev_state_char"); struct work_atoms *out_events, *in_events; struct thread *sched_out, *sched_in; u64 timestamp0, timestamp = sample->time; @@ -1168,7 +1143,7 @@ static int latency_switch_event(struct perf_sched *sched, goto out_put; } } - if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp)) + if (add_sched_out_event(out_events, prev_state, timestamp)) return -1; in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); @@ -2026,24 +2001,12 @@ static void timehist_header(struct perf_sched *sched) printf("\n"); } -static char task_state_char(struct thread *thread, int state) -{ - static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; - unsigned bit = state ? ffs(state) : 0; - - /* 'I' for idle */ - if (thread->tid == 0) - return 'I'; - - return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; -} - static void timehist_print_sample(struct perf_sched *sched, struct evsel *evsel, struct perf_sample *sample, struct addr_location *al, struct thread *thread, - u64 t, int state) + u64 t, char state) { struct thread_runtime *tr = thread__priv(thread); const char *next_comm = evsel__strval(evsel, sample, "next_comm"); @@ -2084,7 +2047,7 @@ static void timehist_print_sample(struct perf_sched *sched, print_sched_time(tr->dt_run, 6); if (sched->show_state) - printf(" %5c ", task_state_char(thread, state)); + printf(" %5c ", thread->tid == 0 ? 'I' : state); if (sched->show_next) { snprintf(nstr, sizeof(nstr), "next: %s[%d]", next_comm, next_pid); @@ -2156,9 +2119,9 @@ static void timehist_update_runtime_stats(struct thread_runtime *r, else if (r->last_time) { u64 dt_wait = tprev - r->last_time; - if (r->last_state == TASK_RUNNING) + if (r->last_state == 'R' || r->last_state == 'p') r->dt_preempt = dt_wait; - else if (r->last_state == TASK_UNINTERRUPTIBLE) + else if (r->last_state == 'D') r->dt_iowait = dt_wait; else r->dt_sleep = dt_wait; @@ -2575,7 +2538,7 @@ static int timehist_sched_change_event(struct perf_tool *tool, struct thread_runtime *tr = NULL; u64 tprev, t = sample->time; int rc = 0; - int state = evsel__intval(evsel, sample, "prev_state"); + char state = evsel__intval(evsel, sample, "prev_state_char"); if (machine__resolve(machine, &al, sample) < 0) { pr_err("problem processing %d event. skipping it\n",