xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf record: Add switch-output time option argument

Browse Source 
It's now possible to specify the threshold time for perf.data like:

  $ perf record --switch-output=30s ...

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

  $ perf record --switch-output=30s ...
  [ perf record: dump data: Woken up 44 times ]
  [ perf record: Dump perf.data.2017010213043746 ]
  ...

The time is expected to be a number with appended unit
character - s/m/h/d.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Wang Nan <wangnan0@huawei.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/1483955520-29063-7-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2017-01-09 10:52:00 +01:00
committed by Arnaldo Carvalho de Melo
parent 0c5824498e
commit bfacbe3bf2
2 changed files with 44 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/Documentation/perf-record.txt
View File

@@ -427,6 +427,8 @@ based on 'mode' value:
"signal" - when receiving a SIGUSR2 (default value) or
<size> - when reaching the size threshold, size is expected to
be a number with appended unit character - B/K/M/G
<time> - when reaching the time threshold, size is expected to
be a number with appended unit character - s/m/h/d
Note: the precision of the size threshold hugely depends
on your configuration - the number and size of your ring