perf record: Add switch-output size option argument
authorJiri Olsa <jolsa@kernel.org>
Mon, 9 Jan 2017 09:51:58 +0000 (10:51 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 11 Jan 2017 19:48:02 +0000 (16:48 -0300)
commitdc0c6127c231d4d264570497a916fa19740c915b
tree9638b3798e736fd79aed45f45876a3f5c67e2677
parentcb4e1ebb6a398ff5b0067034b0d16566af4d78e8
perf record: Add switch-output size option argument

It's now possible to specify the threshold size for perf.data like:

  $ perf record --switch-output=2G ...

Once it's reached, the current data are dumped in to the
perf.data.<timestamp> file and session does on.

  $ perf record --switch-output=2G ...
  [ perf record: dump data: Woken up 7244 times ]
  [ perf record: Dump perf.data.2017010214093746 ]
  ...

The size is expected to be a number with appended unit character -
B/K/M/G.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1483955520-29063-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/Documentation/perf-record.txt
tools/perf/builtin-record.c