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[29/48] perf record: Re-synthesize tracking events after output switching

Message ID 1456132275-98875-30-git-send-email-wangnan0@huawei.com
State New
Headers show

Commit Message

Wang Nan Feb. 22, 2016, 9:10 a.m. UTC 
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 <wangnan0@huawei.com>

Signed-off-by: He Kuang <hekuang@huawei.com>

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
---
 tools/perf/builtin-record.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

-- 
1.8.3.4
diff mbox

Patch

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;
 }