From nobody Mon Feb 9 23:19:45 2026 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 144C5C001DB for ; Sat, 12 Aug 2023 08:52:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236837AbjHLIw3 (ORCPT ); Sat, 12 Aug 2023 04:52:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236151AbjHLIwE (ORCPT ); Sat, 12 Aug 2023 04:52:04 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6167D2684; Sat, 12 Aug 2023 01:52:07 -0700 (PDT) Received: from kwepemm600003.china.huawei.com (unknown [172.30.72.56]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4RNDs62r94z1GDXR; Sat, 12 Aug 2023 16:50:50 +0800 (CST) Received: from localhost.localdomain (10.67.174.95) by kwepemm600003.china.huawei.com (7.193.23.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Sat, 12 Aug 2023 16:52:04 +0800 From: Yang Jihong To: , , , , , , , , , , , , , CC: Subject: [RFC v1 07/16] perf kwork: Add sched record support Date: Sat, 12 Aug 2023 08:49:08 +0000 Message-ID: <20230812084917.169338-8-yangjihong1@huawei.com> X-Mailer: git-send-email 2.30.GIT In-Reply-To: <20230812084917.169338-1-yangjihong1@huawei.com> References: <20230812084917.169338-1-yangjihong1@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.67.174.95] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600003.china.huawei.com (7.193.23.202) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The kwork_class type of sched is added to support recording and parsing of sched_switch events. As follows: # perf kwork -h Usage: perf kwork [] {record|report|latency|timehist} -D, --dump-raw-trace dump raw trace in ASCII -f, --force don't complain, do it -k, --kwork list of kwork to profile (irq, softirq, workque= ue, sched, etc) -v, --verbose be more verbose (show symbol address, etc) # perf kwork -k sched record true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.083 MB perf.data (47 samples) ] # perf evlist sched:sched_switch dummy:HG # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint eve= nts Signed-off-by: Yang Jihong --- tools/perf/Documentation/perf-kwork.txt | 2 +- tools/perf/builtin-kwork.c | 69 ++++++++++++++++++++++++- tools/perf/util/kwork.h | 5 ++ 3 files changed, 74 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-kwork.txt b/tools/perf/Documenta= tion/perf-kwork.txt index 482d6c52e2ed..2092ab916ea9 100644 --- a/tools/perf/Documentation/perf-kwork.txt +++ b/tools/perf/Documentation/perf-kwork.txt @@ -66,7 +66,7 @@ OPTIONS =20 -k:: --kwork:: - List of kwork to profile (irq, softirq, workqueue, etc) + List of kwork to profile (irq, softirq, workqueue, sched, etc) =20 -v:: --verbose:: diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c index e859c34b23f3..4e2b9103b9e0 100644 --- a/tools/perf/builtin-kwork.c +++ b/tools/perf/builtin-kwork.c @@ -1084,10 +1084,77 @@ static struct kwork_class kwork_workqueue =3D { .work_name =3D workqueue_work_name, }; =20 +static struct kwork_class kwork_sched; +static int process_sched_switch_event(struct perf_tool *tool, + struct evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_kwork *kwork =3D container_of(tool, struct perf_kwork, tool); + + if (kwork->tp_handler->sched_switch_event) + return kwork->tp_handler->sched_switch_event(kwork, &kwork_sched, + evsel, sample, machine); + return 0; +} + +const struct evsel_str_handler sched_tp_handlers[] =3D { + { "sched:sched_switch", process_sched_switch_event, }, +}; + +static int sched_class_init(struct kwork_class *class, + struct perf_session *session) +{ + if (perf_session__set_tracepoints_handlers(session, + sched_tp_handlers)) { + pr_err("Failed to set sched tracepoints handlers\n"); + return -1; + } + + class->work_root =3D RB_ROOT_CACHED; + return 0; +} + +static void sched_work_init(struct perf_kwork *kwork __maybe_unused, + struct kwork_class *class, + struct kwork_work *work, + enum kwork_trace_type src_type, + struct evsel *evsel, + struct perf_sample *sample, + struct machine *machine __maybe_unused) +{ + work->class =3D class; + work->cpu =3D sample->cpu; + + if (src_type =3D=3D KWORK_TRACE_EXIT) { + work->id =3D evsel__intval(evsel, sample, "prev_pid"); + work->name =3D strdup(evsel__strval(evsel, sample, "prev_comm")); + } else if (src_type =3D=3D KWORK_TRACE_ENTRY) { + work->id =3D evsel__intval(evsel, sample, "next_pid"); + work->name =3D strdup(evsel__strval(evsel, sample, "next_comm")); + } +} + +static void sched_work_name(struct kwork_work *work, char *buf, int len) +{ + snprintf(buf, len, "%s", work->name); +} + +static struct kwork_class kwork_sched =3D { + .name =3D "sched", + .type =3D KWORK_CLASS_SCHED, + .nr_tracepoints =3D ARRAY_SIZE(sched_tp_handlers), + .tp_handlers =3D sched_tp_handlers, + .class_init =3D sched_class_init, + .work_init =3D sched_work_init, + .work_name =3D sched_work_name, +}; + static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] =3D= { [KWORK_CLASS_IRQ] =3D &kwork_irq, [KWORK_CLASS_SOFTIRQ] =3D &kwork_softirq, [KWORK_CLASS_WORKQUEUE] =3D &kwork_workqueue, + [KWORK_CLASS_SCHED] =3D &kwork_sched, }; =20 static void print_separator(int len) @@ -1740,7 +1807,7 @@ int cmd_kwork(int argc, const char **argv) OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), OPT_STRING('k', "kwork", &kwork.event_list_str, "kwork", - "list of kwork to profile (irq, softirq, workqueue, etc)"), + "list of kwork to profile (irq, softirq, workqueue, sched, etc)"), OPT_BOOLEAN('f', "force", &kwork.force, "don't complain, do it"), OPT_END() }; diff --git a/tools/perf/util/kwork.h b/tools/perf/util/kwork.h index 736c7a08fb19..f8e9cdd1371a 100644 --- a/tools/perf/util/kwork.h +++ b/tools/perf/util/kwork.h @@ -16,6 +16,7 @@ enum kwork_class_type { KWORK_CLASS_IRQ, KWORK_CLASS_SOFTIRQ, KWORK_CLASS_WORKQUEUE, + KWORK_CLASS_SCHED, KWORK_CLASS_MAX, }; =20 @@ -167,6 +168,10 @@ struct trace_kwork_handler { int (*exit_event)(struct perf_kwork *kwork, struct kwork_class *class, struct evsel *evsel, struct perf_sample *sample, struct machine *machine); + + int (*sched_switch_event)(struct perf_kwork *kwork, + struct kwork_class *class, struct evsel *evsel, + struct perf_sample *sample, struct machine *machine); }; =20 struct perf_kwork { --=20 2.30.GIT