From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17D03C31E5B for ; Mon, 17 Jun 2019 19:24:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DC4422085A for ; Mon, 17 Jun 2019 19:24:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="u213Ud3x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728957AbfFQTYR (ORCPT ); Mon, 17 Jun 2019 15:24:17 -0400 Received: from terminus.zytor.com ([198.137.202.136]:33387 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725938AbfFQTYR (ORCPT ); Mon, 17 Jun 2019 15:24:17 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id x5HJMvqS3560980 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Mon, 17 Jun 2019 12:22:57 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 terminus.zytor.com x5HJMvqS3560980 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2019051801; t=1560799378; bh=0LpUTzT55sD8s4HcTpVvquBmaFsugFfc5cYz43X3kQg=; h=Date:From:Cc:Reply-To:In-Reply-To:References:To:Subject:From; b=u213Ud3xxtTkixyT4dw4eAHsiz6WDn4ykC80ZsZOArWDeuGaTtVD0VHuke+P6nQGV xJgiSL+C2CyWJ6JLwkjk7I1tZ/9qt5w1L8nULX76JKyrWIneU2ZbqNFb64Ig3cU7tP Dc98jQaoCFgRZLLGpSW9DBxzMZo8nf8EMn2rn2H5impC3xqFjG4opysmJENCtriNCB a14kX/CvpKAAAPxeXLUduX0xTecOCU5U6gHYdjit649c82NdCdOB9CLGy7lebvBpvE Ciaxqaf8IglP40Jdu5XQ/N9tB6Jep0RszC2+nnpcYsMwo+YZx4Xmc4ieEqz1FakzSs Fy1cX+efIkHcQ== Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id x5HJMvb33560977; Mon, 17 Jun 2019 12:22:57 -0700 Date: Mon, 17 Jun 2019 12:22:57 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Mathieu Poirier Message-ID: Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, tglx@linutronix.de, suzuki.poulose@arm.com, acme@redhat.com, hpa@zytor.com, namhyung@kernel.org, mingo@kernel.org, mathieu.poirier@linaro.org, jolsa@redhat.com, alexander.shishkin@linux.intel.com, leo.yan@linaro.org Reply-To: namhyung@kernel.org, mingo@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, mathieu.poirier@linaro.org, leo.yan@linaro.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, peterz@infradead.org, suzuki.poulose@arm.com, hpa@zytor.com, acme@redhat.com In-Reply-To: <20190524173508.29044-6-mathieu.poirier@linaro.org> References: <20190524173508.29044-6-mathieu.poirier@linaro.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf cs-etm: Add handling of switch-CPU-wide events Git-Commit-ID: e0d170fa9a5c6dfc29fb8f900497d8c5ec29c6e7 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: e0d170fa9a5c6dfc29fb8f900497d8c5ec29c6e7 Gitweb: https://git.kernel.org/tip/e0d170fa9a5c6dfc29fb8f900497d8c5ec29c6e7 Author: Mathieu Poirier AuthorDate: Fri, 24 May 2019 11:34:56 -0600 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 10 Jun 2019 15:50:01 -0300 perf cs-etm: Add handling of switch-CPU-wide events 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 Tested-by: Leo Yan Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190524173508.29044-6-mathieu.poirier@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- 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; }