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Message-ID: <1455882283-79592-38-git-send-email-wangnan0@huawei.com>
Date: Fri, 19 Feb 2016 11:44:25 +0000
From: Wang Nan <wangnan0@...wei.com>
To: Alexei Starovoitov <ast@...nel.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Brendan Gregg <brendan.d.gregg@...il.com>
CC: Adrian Hunter <adrian.hunter@...el.com>,
Cody P Schafer <dev@...yps.com>,
"David S. Miller" <davem@...emloft.net>,
He Kuang <hekuang@...wei.com>,
Jérémie Galarneau
<jeremie.galarneau@...icios.com>, Jiri Olsa <jolsa@...nel.org>,
Kirill Smelkov <kirr@...edi.com>,
Li Zefan <lizefan@...wei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <peterz@...radead.org>, <pi3orama@....com>,
Wang Nan <wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 37/55] perf record: Generate tracking events for process forked by perf
With 'perf record --switch-output' without -a, record__synthesize() in
record__switch_output() won't generate tracking events because there's
no thread_map in evlist. Which causes newly created perf.data doesn't
contain map and comm information.
This patch creates a fake thread_map and directly call
perf_event__synthesize_thread_map() for those events.
Signed-off-by: Wang Nan <wangnan0@...wei.com>
Signed-off-by: He Kuang <hekuang@...wei.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Zefan Li <lizefan@...wei.com>
Cc: pi3orama@....com
---
tools/perf/builtin-record.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3a11102..7d4d8bf 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -567,6 +567,23 @@ record__switch_output(struct record *rec, bool at_exit)
perf_session__create_kernel_maps(rec->session);
perf_session__set_id_hdr_size(rec->session);
record__synthesize(rec);
+
+ if (target__none(&rec->opts.target)) {
+ struct {
+ struct thread_map map;
+ struct thread_map_data map_data;
+ } thread_map;
+
+ thread_map.map.nr = 1;
+ thread_map.map.map[0].pid = rec->evlist->workload.pid;
+ thread_map.map.map[0].comm = NULL;
+ perf_event__synthesize_thread_map(&rec->tool,
+ &thread_map.map,
+ process_synthesized_event,
+ &rec->session->machines.host,
+ rec->opts.sample_address,
+ rec->opts.proc_map_timeout);
+ }
}
return fd;
}
--
1.8.3.4
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