Messages in this thread Patch in this message |  | | From | Wang Nan <> | Subject | [PATCH 36/55] perf record: Re-synthesize tracking events after output switching | Date | Fri, 19 Feb 2016 11:44:24 +0000 |
| |
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(+)
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
|  |