From patchwork Wed Aug 2 12:09:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ze Gao X-Patchwork-Id: 13338081 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 0BB37C04E69 for ; Wed, 2 Aug 2023 12:11:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234456AbjHBMLq (ORCPT ); Wed, 2 Aug 2023 08:11:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234462AbjHBMLk (ORCPT ); Wed, 2 Aug 2023 08:11:40 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A94E1271F; Wed, 2 Aug 2023 05:11:37 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1b8ad907ba4so43267905ad.0; Wed, 02 Aug 2023 05:11:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690978297; x=1691583097; 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=ZqGWXQUnHEGIAJjlk8NVej2IuOd14tKht3c5V5V3ivI=; b=sDgeP+W6It3x/c+hnUfPaWiCAwbaeo0jUWBK6/dZhZk/YzMKkkI5MmcTIs/+J91v4r 7llUnq2bZ8J9DkJ2dKelVrQJ/27SQQNVwxqdQF896REqNipbyzgZtgHMjtANcCumrODk llX5/OjZiRiFEvMXqSWRCSpqeqKPID9XMVGWWAJu/LNqM3wWUbA2q22l17ddS83iWxBt bh/2cKzHn03XqrkyDg6CCwG5lxCDtdpb2yvg0tBMslgnVboQPDnVNs0lX+uFSICGVx2q XcN439Y/JoAzhBLWXANCXqLXxyIrF2lQrI6vnKZv5lAuCK4zuRYkB3aDhUHHiR8ivQ0H bXfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690978297; x=1691583097; 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=ZqGWXQUnHEGIAJjlk8NVej2IuOd14tKht3c5V5V3ivI=; b=KlDD5Q8lLco/9a4u3dTXQu/W2k+w8VrEBU3Q7YMMORADc2caFAJU+AY7ZMbIpw53KQ 2vN1ZlnsVnD75T2WrXBVTSTUCJNkStMsG8f15NRiMDS6ysjaFvmxRzT5O3rb96SXgZCA D+n+Z6lzfiSjAbWvSSv9NM8DuaO62vDY2Gqte8fRuZZk90x/ALAiwSdEuJal/ED9DGmi 6TwIiFxE8e0+sdnj326yCZL/0NU4q7S/aAfyz+ZFC97PZMl+yoOn3K8M6fdIfIDMhf59 ONRYi2za3oY1Q19RqjtdgSASz0BzUrxDdPY+xXbmO99eeBYbNGtJ5YOVF4IU9J+pgFb9 9DkA== X-Gm-Message-State: AOJu0Yw/JuToomx7komC73HbzPrSFl7Jvx+s0oedJheE8QeuMQHSXEIQ JQQhq0IjZPA+59f++mRL91c= X-Google-Smtp-Source: AGHT+IE+QZq3X4ahtZ584vN7WYd89X2mAy68x93P4ggiNHq7OEphbRQRiip15PSP+qDQCVU4Ra8TPg== X-Received: by 2002:a17:902:efc9:b0:1bc:3944:9391 with SMTP id ja9-20020a170902efc900b001bc39449391mr353150plb.25.1690978296884; Wed, 02 Aug 2023 05:11:36 -0700 (PDT) Received: from localhost.localdomain ([43.132.98.115]) by smtp.googlemail.com with ESMTPSA id kx14-20020a170902f94e00b001b890009634sm12293173plb.139.2023.08.02.05.11.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Aug 2023 05:11:36 -0700 (PDT) From: Ze Gao X-Google-Original-From: Ze Gao To: Adrian Hunter , Alexander Shishkin , Arnaldo Carvalho de Melo , Ian Rogers , Ingo Molnar , Jiri Olsa , Mark Rutland , Masami Hiramatsu , Namhyung Kim , Peter Zijlstra , Steven Rostedt Cc: 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 v4 3/7] perf sched: reorganize sched-out task state report code Date: Wed, 2 Aug 2023 08:09:58 -0400 Message-ID: <20230802121116.324604-4-zegao@tencent.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230802121116.324604-1-zegao@tencent.com> References: <20230802121116.324604-1-zegao@tencent.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Mainly does housekeeping work and not introduce any functional change. Signed-off-by: Ze Gao --- tools/perf/builtin-sched.c | 57 ++++++++++++++++---------------------- 1 file changed, 24 insertions(+), 33 deletions(-) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 8dc8f071721c..eb310d1a7625 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -94,11 +94,6 @@ struct sched_atom { #define TASK_STATE_TO_CHAR_STR "RSDTtXZPI" -/* task state bitmask, copied from include/linux/sched.h */ -#define TASK_RUNNING 0 -#define TASK_INTERRUPTIBLE 1 -#define TASK_UNINTERRUPTIBLE 2 - enum thread_state { THREAD_SLEEPING = 0, THREAD_WAIT_CPU, @@ -255,7 +250,7 @@ struct thread_runtime { u64 total_preempt_time; u64 total_delay_time; - int last_state; + char last_state; char shortname[3]; bool comm_changed; @@ -425,7 +420,7 @@ 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); @@ -840,6 +835,20 @@ replay_wakeup_event(struct perf_sched *sched, return 0; } +static inline char task_state_char(int state) +{ + static const char state_to_char[] = "RSDTtXZPI"; + unsigned bit = state ? ffs(state) : 0; + return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; +} + +static inline char get_task_prev_state(struct evsel *evsel, + struct perf_sample *sample) +{ + const int prev_state = evsel__intval(evsel, sample, "prev_state"); + return task_state_char(prev_state); +} + static int replay_switch_event(struct perf_sched *sched, struct evsel *evsel, struct perf_sample *sample, @@ -849,7 +858,7 @@ 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 = get_task_prev_state(evsel, sample); struct task_desc *prev, __maybe_unused *next; u64 timestamp0, timestamp = sample->time; int cpu = sample->cpu; @@ -1039,12 +1048,6 @@ 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, @@ -1121,7 +1124,7 @@ 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 = get_task_prev_state(evsel, sample); struct work_atoms *out_events, *in_events; struct thread *sched_out, *sched_in; u64 timestamp0, timestamp = sample->time; @@ -1157,7 +1160,7 @@ 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); @@ -2022,24 +2025,12 @@ 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(thread) == 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"); @@ -2080,7 +2071,7 @@ 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); @@ -2152,9 +2143,9 @@ 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->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; @@ -2579,7 +2570,7 @@ 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"); + const char state = get_task_prev_state(evsel, sample); addr_location__init(&al); if (machine__resolve(machine, &al, sample) < 0) {