From: Mathieu Poirier <mathieu.poirier@linaro.org> To: acme@kernel.org Cc: peterz@infradead.org, mingo@redhat.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, suzuki.poulose@arm.com, leo.yan@linaro.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Subject: [PATCH v2 05/17] perf tools: Add handling of switch-CPU-wide events Date: Fri, 24 May 2019 11:34:56 -0600 [thread overview] Message-ID: <20190524173508.29044-6-mathieu.poirier@linaro.org> (raw) In-Reply-To: <20190524173508.29044-1-mathieu.poirier@linaro.org> Add handling of SWITCH-CPU-WIDE events in order to add the tid/pid of the incoming process to the perf tools machine infrastructure. This information is later retrieved when a contextID packet is found in the trace stream. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- tools/perf/util/cs-etm.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 0742c50fce46..5322dcaaf654 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -1680,6 +1680,42 @@ static int cs_etm__process_itrace_start(struct cs_etm_auxtrace *etm, return 0; } +static int cs_etm__process_switch_cpu_wide(struct cs_etm_auxtrace *etm, + union perf_event *event) +{ + struct thread *th; + bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; + + /* + * Context switch in per-thread mode are irrelevant since perf + * will start/stop tracing as the process is scheduled. + */ + if (etm->timeless_decoding) + return 0; + + /* + * SWITCH_IN events carry the next process to be switched out while + * SWITCH_OUT events carry the process to be switched in. As such + * we don't care about IN events. + */ + if (!out) + return 0; + + /* + * Add the tid/pid to the log so that we can get a match when + * we get a contextID from the decoder. + */ + th = machine__findnew_thread(etm->machine, + event->context_switch.next_prev_pid, + event->context_switch.next_prev_tid); + if (!th) + return -ENOMEM; + + thread__put(th); + + return 0; +} + static int cs_etm__process_event(struct perf_session *session, union perf_event *event, struct perf_sample *sample, @@ -1719,6 +1755,8 @@ static int cs_etm__process_event(struct perf_session *session, if (event->header.type == PERF_RECORD_ITRACE_START) return cs_etm__process_itrace_start(etm, event); + else if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) + return cs_etm__process_switch_cpu_wide(etm, event); return 0; } -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Mathieu Poirier <mathieu.poirier@linaro.org> To: acme@kernel.org Cc: suzuki.poulose@arm.com, peterz@infradead.org, coresight@lists.linaro.org, linux-kernel@vger.kernel.org, alexander.shishkin@linux.intel.com, mingo@redhat.com, leo.yan@linaro.org, namhyung@kernel.org, jolsa@redhat.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 05/17] perf tools: Add handling of switch-CPU-wide events Date: Fri, 24 May 2019 11:34:56 -0600 [thread overview] Message-ID: <20190524173508.29044-6-mathieu.poirier@linaro.org> (raw) In-Reply-To: <20190524173508.29044-1-mathieu.poirier@linaro.org> Add handling of SWITCH-CPU-WIDE events in order to add the tid/pid of the incoming process to the perf tools machine infrastructure. This information is later retrieved when a contextID packet is found in the trace stream. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- tools/perf/util/cs-etm.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 0742c50fce46..5322dcaaf654 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -1680,6 +1680,42 @@ static int cs_etm__process_itrace_start(struct cs_etm_auxtrace *etm, return 0; } +static int cs_etm__process_switch_cpu_wide(struct cs_etm_auxtrace *etm, + union perf_event *event) +{ + struct thread *th; + bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; + + /* + * Context switch in per-thread mode are irrelevant since perf + * will start/stop tracing as the process is scheduled. + */ + if (etm->timeless_decoding) + return 0; + + /* + * SWITCH_IN events carry the next process to be switched out while + * SWITCH_OUT events carry the process to be switched in. As such + * we don't care about IN events. + */ + if (!out) + return 0; + + /* + * Add the tid/pid to the log so that we can get a match when + * we get a contextID from the decoder. + */ + th = machine__findnew_thread(etm->machine, + event->context_switch.next_prev_pid, + event->context_switch.next_prev_tid); + if (!th) + return -ENOMEM; + + thread__put(th); + + return 0; +} + static int cs_etm__process_event(struct perf_session *session, union perf_event *event, struct perf_sample *sample, @@ -1719,6 +1755,8 @@ static int cs_etm__process_event(struct perf_session *session, if (event->header.type == PERF_RECORD_ITRACE_START) return cs_etm__process_itrace_start(etm, event); + else if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) + return cs_etm__process_switch_cpu_wide(etm, event); return 0; } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-05-24 17:36 UTC|newest] Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-05-24 17:34 [PATCH v2 00/17] perf tools: Coresight: Add CPU-wide trace support Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 01/17] perf tools: Configure contextID tracing in CPU-wide mode Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-07 9:21 ` Suzuki K Poulose 2019-06-07 9:21 ` Suzuki K Poulose 2019-06-07 17:40 ` Mathieu Poirier 2019-06-07 17:40 ` Mathieu Poirier 2019-06-07 18:20 ` Arnaldo Carvalho de Melo 2019-06-07 18:20 ` Arnaldo Carvalho de Melo 2019-06-07 19:33 ` Mathieu Poirier 2019-06-07 19:33 ` Mathieu Poirier 2019-06-17 19:36 ` [tip:perf/core] perf cs-etm: Remove duplicate GENMASK() define, use linux/bits.h instead tip-bot for Arnaldo Carvalho de Melo 2019-06-17 19:20 ` [tip:perf/core] perf cs-etm: Configure contextID tracing in CPU-wide mode tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 02/17] perf tools: Configure timestsamp generation " Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-07 9:41 ` Suzuki K Poulose 2019-06-07 9:41 ` Suzuki K Poulose 2019-06-07 17:46 ` Mathieu Poirier 2019-06-07 17:46 ` Mathieu Poirier 2019-06-07 18:34 ` Arnaldo Carvalho de Melo 2019-06-07 18:34 ` Arnaldo Carvalho de Melo 2019-06-17 19:20 ` [tip:perf/core] perf cs-etm: Configure timestamp " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 03/17] perf tools: Configure SWITCH_EVENTS " Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-17 19:21 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 04/17] perf tools: Add handling of itrace start events Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-17 19:22 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier [this message] 2019-05-24 17:34 ` [PATCH v2 05/17] perf tools: Add handling of switch-CPU-wide events Mathieu Poirier 2019-06-17 19:22 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 06/17] perf tools: Refactor error path in cs_etm_decoder__new() Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-17 19:23 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 07/17] perf tools: Move packet queue out of decoder structure Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-17 19:24 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:34 ` [PATCH v2 08/17] perf tools: Fix indentation in function cs_etm__process_decoder_queue() Mathieu Poirier 2019-05-24 17:34 ` Mathieu Poirier 2019-06-17 19:25 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 09/17] perf tools: Introduce the concept of trace ID queues Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:25 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 10/17] perf tools: Get rid of unused cpu in struct cs_etm_queue Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:26 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 11/17] perf tools: Move thread to traceid_queue Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:27 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 12/17] perf tools: Move tid/pid " Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:27 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 13/17] perf tools: Use traceID aware memory callback API Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:28 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 14/17] perf tools: Add support for multiple traceID queues Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:29 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 15/17] perf tools: Linking PE contextID with perf thread mechanic Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:29 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 16/17] perf tools: Add notion of time to decoding code Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-06 18:50 ` Arnaldo Carvalho de Melo 2019-06-06 18:50 ` Arnaldo Carvalho de Melo 2019-06-07 14:38 ` Mathieu Poirier 2019-06-07 14:38 ` Mathieu Poirier 2019-06-17 19:30 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-24 17:35 ` [PATCH v2 17/17] perf tools: Add support for CPU-wide trace scenarios Mathieu Poirier 2019-05-24 17:35 ` Mathieu Poirier 2019-06-17 19:31 ` [tip:perf/core] perf cs-etm: " tip-bot for Mathieu Poirier 2019-05-31 1:45 ` [PATCH v2 00/17] perf tools: Coresight: Add CPU-wide trace support Leo Yan 2019-05-31 1:45 ` Leo Yan
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190524173508.29044-6-mathieu.poirier@linaro.org \ --to=mathieu.poirier@linaro.org \ --cc=acme@kernel.org \ --cc=alexander.shishkin@linux.intel.com \ --cc=coresight@lists.linaro.org \ --cc=jolsa@redhat.com \ --cc=leo.yan@linaro.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=mingo@redhat.com \ --cc=namhyung@kernel.org \ --cc=peterz@infradead.org \ --cc=suzuki.poulose@arm.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.