From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751391AbbERAkz (ORCPT ); Sun, 17 May 2015 20:40:55 -0400 Received: from LGEMRELSE6Q.lge.com ([156.147.1.121]:54339 "EHLO lgemrelse6q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751849AbbERAki (ORCPT ); Sun, 17 May 2015 20:40:38 -0400 X-Original-SENDERIP: 10.177.220.203 X-Original-MAILFROM: namhyung@kernel.org From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern , Adrian Hunter , Andi Kleen , Frederic Weisbecker , Stephane Eranian Subject: [PATCH 01/40] perf tools: Use a software dummy event to track task/mmap events Date: Mon, 18 May 2015 09:30:16 +0900 Message-Id: <1431909055-21442-2-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 2.4.0 In-Reply-To: <1431909055-21442-1-git-send-email-namhyung@kernel.org> References: <1431909055-21442-1-git-send-email-namhyung@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add APIs for software dummy event to track task/comm/mmap events separately. The perf record will use them to save such events in a separate mmap buffer to make it easy to index. This is a preparation of multi-thread support which will come later. Cc: Adrian Hunter Signed-off-by: Namhyung Kim --- tools/perf/util/evlist.c | 30 ++++++++++++++++++++++++++++++ tools/perf/util/evlist.h | 1 + tools/perf/util/evsel.h | 15 +++++++++++++++ 3 files changed, 46 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 7ec1bf93ab28..5bbd0ea82fc4 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -194,6 +194,36 @@ int perf_evlist__add_default(struct perf_evlist *evlist) return -ENOMEM; } +int perf_evlist__add_dummy_tracking(struct perf_evlist *evlist) +{ + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_DUMMY, + .exclude_kernel = 1, + }; + struct perf_evsel *evsel; + + event_attr_init(&attr); + + evsel = perf_evsel__new(&attr); + if (evsel == NULL) + goto error; + + /* use strdup() because free(evsel) assumes name is allocated */ + evsel->name = strdup("dummy"); + if (!evsel->name) + goto error_free; + + perf_evlist__add(evlist, evsel); + perf_evlist__set_tracking_event(evlist, evsel); + + return 0; +error_free: + perf_evsel__delete(evsel); +error: + return -ENOMEM; +} + static int perf_evlist__add_attrs(struct perf_evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) { diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index c07b1a94a724..6cc580e1a43b 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -70,6 +70,7 @@ void perf_evlist__delete(struct perf_evlist *evlist); void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry); int perf_evlist__add_default(struct perf_evlist *evlist); +int perf_evlist__add_dummy_tracking(struct perf_evlist *evlist); int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs); diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index e486151b0308..4c47ebdf3c10 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -331,6 +331,21 @@ static inline bool perf_evsel__is_function_event(struct perf_evsel *evsel) #undef FUNCTION_EVENT } +/** + * perf_evsel__is_dummy_tracking - Return whether given evsel is a dummy + * event for tracking meta events only + * + * @evsel - evsel selector to be tested + * + * Return %true if event is a dummy tracking event + */ +static inline bool perf_evsel__is_dummy_tracking(struct perf_evsel *evsel) +{ + return evsel->attr.type == PERF_TYPE_SOFTWARE && + evsel->attr.config == PERF_COUNT_SW_DUMMY && + evsel->attr.task == 1 && evsel->attr.mmap == 1; +} + struct perf_attr_details { bool freq; bool verbose; -- 2.4.0