On Mon, Sep 02, 2013 at 10:52:46AM +0300, Adrian Hunter wrote: > On 01/09/13 13:36, Jiri Olsa wrote: > > split event data into multiple files based on the file > > size or time delta specified as an argument to the option. > > > > Adding multi file '-M' option for record command to store > > output perf.data into multiple files based on the size > > threshold. > > > > The threshold is specified either as size (B/K/M/G) or time > > (s/m/h) by appending the size with appropriate unit, like: > > -M 5M for 5 megabytes threshold > > -M 1h for 1 hour threshold > > The generated name for each data file is appended with sequential > > number (prepended by 5 zeros).For default output file name it > > will be: > > perf.data-00000 > > perf.data-00001 > > perf.data-00002 > > ... > > > > Also watermark/wakeup_watermark is set accordingly to get > > wake ups more often so we could get close enough to the > > file size promise. > > > > Example: > > $ perf record -M 5M yes > /dev/null > > ^C[ perf record: Woken up 228 times to write data ] > > [ perf record: Captured and wrote 20.246 MB perf.data-[0-4](~884542 > > samples) ] > > yes: Interrupt > > $ ls -l perf.data-0* > > -rw------- 1 jolsa jolsa 5289856 Aug 16 16:07 perf.data-00000 > > -rw------- 1 jolsa jolsa 5296008 Aug 16 16:08 perf.data-00001 > > -rw------- 1 jolsa jolsa 5344968 Aug 16 16:09 perf.data-00002 > > -rw------- 1 jolsa jolsa 5309144 Aug 16 16:09 perf.data-00003 > > -rw------- 1 jolsa jolsa 2358268 Aug 16 16:09 perf.data-00004 > > Did you consider doing this with "perf inject" instead of "perf record"? > That way you could get the split exactly right, and you could split the same > file different ways.
right, this could be added into inject command as well jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
