From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752456AbdI1EuT (ORCPT ); Thu, 28 Sep 2017 00:50:19 -0400 Received: from mga01.intel.com ([192.55.52.88]:34097 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752044AbdI1EtO (ORCPT ); Thu, 28 Sep 2017 00:49:14 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,448,1500966000"; d="scan'208";a="904625810" From: Jin Yao To: acme@kernel.org, jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com, alexander.shishkin@linux.intel.com Cc: Linux-kernel@vger.kernel.org, ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.com, Jin Yao Subject: [PATCH v3 2/6] perf record: Get the first sample time and last sample time Date: Thu, 28 Sep 2017 20:45:17 +0800 Message-Id: <1506602721-3784-3-git-send-email-yao.jin@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1506602721-3784-1-git-send-email-yao.jin@linux.intel.com> References: <1506602721-3784-1-git-send-email-yao.jin@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In perf record, it's walked on all samples yet. So it's very easy to get the first/last samples and save the time to perf file header via the function write_sample_time(). In later, perf report/script will fetch the time from perf file header. Change log: ----------- v3: Remove the definitions of first_sample_time and last_sample_time from struct record and directly save them in perf_evlist. Signed-off-by: Jin Yao --- tools/perf/builtin-record.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 9b379f3..d5b78449 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -488,6 +488,11 @@ static int process_sample_event(struct perf_tool *tool, rec->samples++; + if (rec->evlist->first_sample_time == 0) + rec->evlist->first_sample_time = sample->time; + + rec->evlist->last_sample_time = sample->time; + return build_id__mark_dso_hit(tool, event, sample, evsel, machine); } -- 2.7.4