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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT 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 5D166C4321A for ; Tue, 11 Jun 2019 19:02:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 395FE218A0 for ; Tue, 11 Jun 2019 19:02:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560279749; bh=K0DpfopyNYA6J2Lj0bP5xdn0OdW8Rb4/ZLP0V22+cvE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cApevRyt5+W06yCGC/6I8SC6W+8gwZrr4B7Z6VHQmvIfU8HsUuojOi73dGI8zfx9L x8eCHcjjSZFbOlSSnWHsSPi1KVZyOOBlAu+kBTNiC9C4huIjI7/Oz8JzWrUzhs73+j +pOLS4Kxzl1U1PYVwRgkWwLHHDL6arPTQWhIEZhU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404972AbfFKTC2 (ORCPT ); Tue, 11 Jun 2019 15:02:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:38618 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392376AbfFKTC1 (ORCPT ); Tue, 11 Jun 2019 15:02:27 -0400 Received: from quaco.ghostprotocols.net (unknown [179.97.35.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B81FB2184C; Tue, 11 Jun 2019 19:02:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560279746; bh=K0DpfopyNYA6J2Lj0bP5xdn0OdW8Rb4/ZLP0V22+cvE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wZNjl5ljl0FvmEz49GGKy5uN2g7cuzDB6cKXM28VVkT0q1WciI4Ju/MdQt7sxWgQz 2z33IsZN/lO0eAbfw3M1GhWJ45tqaPaZJwY6e03QHn9+l3GSu0WI1Qjj2VEh3pycHd nrU76SdaJbsMoLIkwq64hLe2AvtzMRliGAmp+QnA= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Mathieu Poirier , Leo Yan , Alexander Shishkin , Jiri Olsa , Peter Zijlstra , Suzuki Poulouse , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, Arnaldo Carvalho de Melo Subject: [PATCH 41/85] perf cs-etm: Add handling of switch-CPU-wide events Date: Tue, 11 Jun 2019 15:58:27 -0300 Message-Id: <20190611185911.11645-42-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190611185911.11645-1-acme@kernel.org> References: <20190611185911.11645-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathieu Poirier 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; } -- 2.20.1