Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752070AbcDRGc7 (ORCPT ); Mon, 18 Apr 2016 02:32:59 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:1413 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751660AbcDRGc5 (ORCPT ); Mon, 18 Apr 2016 02:32:57 -0400 From: Wang Nan To: , CC: , , Wang Nan , Adrian Hunter , He Kuang , Jiri Olsa , Masami Hiramatsu , Namhyung Kim , Zefan Li , Arnaldo Carvalho de Melo Subject: [PATCH v4 5/6] perf record: Re-synthesize tracking events after output switching Date: Mon, 18 Apr 2016 06:32:12 +0000 Message-ID: <1460961133-182746-6-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1460961133-182746-1-git-send-email-wangnan0@huawei.com> References: <1460961133-182746-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A0B0204.57147F82.009A,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: c25374e3b9f5d05f05d56f6065cb1bce Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1702 Lines: 52 Tracking events describe kernel and threads. They are generated by reading /proc/kallsyms, /proc/*/maps and /proc/*/task/* during initialization of 'perf record', serialized into event sequences and put at the head of 'perf.data'. In case of output switching, each output file should contain those events. This patch calls record__synthesize() during output switching, so the event sequences described above can be collected again. Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: He Kuang Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460643725-167413-6-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 743af13..2965d83 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -500,6 +500,8 @@ record__finish_output(struct record *rec) return; } +static int record__synthesize(struct record *rec); + static int record__switch_output(struct record *rec, bool at_exit) { @@ -528,6 +530,11 @@ record__switch_output(struct record *rec, bool at_exit) if (!quiet) fprintf(stderr, "[ perf record: Dump %s.%s ]\n", file->path, timestamp); + + /* Output tracking events */ + if (!at_exit) + record__synthesize(rec); + return fd; } -- 1.8.3.4