From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754016AbcBVJfE (ORCPT ); Mon, 22 Feb 2016 04:35:04 -0500 Received: from szxga02-in.huawei.com ([119.145.14.65]:55844 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752028AbcBVJNg (ORCPT ); Mon, 22 Feb 2016 04:13:36 -0500 From: Wang Nan To: Alexei Starovoitov , Arnaldo Carvalho de Melo , Arnaldo Carvalho de Melo , Brendan Gregg CC: Adrian Hunter , Cody P Schafer , "David S. Miller" , He Kuang , =?UTF-8?q?J=C3=A9r=C3=A9mie=20Galarneau?= , Jiri Olsa , Kirill Smelkov , Li Zefan , Masami Hiramatsu , Namhyung Kim , Peter Zijlstra , , Wang Nan , Subject: [PATCH 29/48] perf record: Re-synthesize tracking events after output switching Date: Mon, 22 Feb 2016 09:10:56 +0000 Message-ID: <1456132275-98875-30-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1456132275-98875-1-git-send-email-wangnan0@huawei.com> References: <1456132275-98875-1-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=0001.0A020205.56CAD0E9.0013,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: 38373708cca3a7119c0a5ae393ba479b Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: He Kuang Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com --- tools/perf/builtin-record.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 2839715..3a11102 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -529,6 +529,8 @@ 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) { @@ -557,6 +559,15 @@ record__switch_output(struct record *rec, bool at_exit) if (!quiet) fprintf(stderr, "[ perf record: Dump %s.%s ]\n", file->path, timestamp); + + /* Reinit machine */ + if (!at_exit) { + machines__exit(&rec->session->machines); + machines__init(&rec->session->machines); + perf_session__create_kernel_maps(rec->session); + perf_session__set_id_hdr_size(rec->session); + record__synthesize(rec); + } return fd; } -- 1.8.3.4