From: Jiri Olsa <jolsa@redhat.com>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: linux-kernel@vger.kernel.org,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@elte.hu>, Namhyung Kim <namhyung@kernel.org>,
Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Andi Kleen <ak@linux.intel.com>, David Ahern <dsahern@gmail.com>
Subject: Re: [PATCH 24/25] perf tools: Add multi file '-M' option for record command
Date: Mon, 2 Sep 2013 10:37:37 +0200 [thread overview]
Message-ID: <20130902083737.GA1067@krava.brq.redhat.com> (raw)
In-Reply-To: <522443CE.5030703@intel.com>
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
next prev parent reply other threads:[~2013-09-02 8:38 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-01 10:36 [PATCHv2 00/25] perf tool: Add support for multiple data file storage Jiri Olsa
2013-09-01 10:36 ` [PATCH 01/25] perf tools: Check mmap pages value early Jiri Olsa
2013-10-15 5:24 ` [tip:perf/core] " tip-bot for Jiri Olsa
2013-09-01 10:36 ` [PATCH 02/25] perf tools: Add possibility to specify mmap size Jiri Olsa
2013-10-15 5:25 ` [tip:perf/core] " tip-bot for Jiri Olsa
2013-09-01 10:36 ` [PATCH 03/25] perf tools: Introduce perf_evlist__new_default function Jiri Olsa
2013-10-15 5:25 ` [tip:perf/core] perf evlist: " tip-bot for Jiri Olsa
2013-09-01 10:36 ` [PATCH 04/25] perf tools: Adding throttle event data struct support Jiri Olsa
2013-10-15 5:25 ` [tip:perf/core] " tip-bot for Jiri Olsa
2013-09-01 10:36 ` [PATCH 05/25] perf tests: Add simple session read/write test Jiri Olsa
2013-09-01 10:36 ` [PATCH 06/25] perf tests: Add session reading test for little endian perf data Jiri Olsa
2013-09-01 10:36 ` [PATCH 07/25] perf tests: Add session reading test for big " Jiri Olsa
2013-09-01 10:36 ` [PATCH 08/25] perf doc: Add perf data file documentation Jiri Olsa
2013-09-01 10:36 ` [PATCH 09/25] perf tools: Introduce perf data file version CHECK macro Jiri Olsa
2013-09-01 10:36 ` [PATCH 10/25] perf tools: Introduce swap_features function Jiri Olsa
2013-09-01 10:36 ` [PATCH 11/25] perf tools: Introduce swap_header function Jiri Olsa
2013-09-01 10:36 ` [PATCH 12/25] perf tools: Separate version 2 specific perf data header bits Jiri Olsa
2013-09-01 10:36 ` [PATCH 13/25] perf tools: Using evlist as a holder for event_desc feature Jiri Olsa
2013-09-01 10:36 ` [PATCH 14/25] perf tools: Introduce perf.data version 3 format Jiri Olsa
2013-09-01 10:36 ` [PATCH 15/25] perf tools: Add perf data version 3 header swap Jiri Olsa
2013-09-01 10:36 ` [PATCH 16/25] perf tools: Add perf data version 3 header read Jiri Olsa
2013-09-01 10:36 ` [PATCH 17/25] perf tools: Add perf.data version 3 header write Jiri Olsa
2013-09-01 10:36 ` [PATCH 18/25] perf tools: Get rid of post_processing_offset in record command Jiri Olsa
2013-09-01 10:36 ` [PATCH 19/25] perf tools: Move synthesizing into single function Jiri Olsa
2013-09-01 10:36 ` [PATCH 20/25] perf tools: Add perf_data_file__open interface to data object Jiri Olsa
2013-09-01 10:36 ` [PATCH 21/25] perf tools: Separating data file properties from session Jiri Olsa
2013-09-01 10:36 ` [PATCH 22/25] perf tests: Add session reading test for little endian perf data v3 Jiri Olsa
2013-09-01 10:36 ` [PATCH 23/25] perf tests: Add session reading test for big " Jiri Olsa
2013-09-01 10:36 ` [PATCH 24/25] perf tools: Add multi file '-M' option for record command Jiri Olsa
2013-09-02 7:52 ` Adrian Hunter
2013-09-02 8:37 ` Jiri Olsa [this message]
2013-09-02 9:11 ` Adrian Hunter
2013-09-02 9:40 ` Jiri Olsa
2013-09-01 10:36 ` [PATCH 25/25] perf tools: Have the process properly sythesized in subsequent data files Jiri Olsa
2013-09-02 2:42 ` [PATCHv2 00/25] perf tool: Add support for multiple data file storage Andi Kleen
2013-09-09 11:17 ` Peter Zijlstra
2013-09-09 11:36 ` Jiri Olsa
2013-09-09 11:55 ` Peter Zijlstra
2013-09-09 14:03 ` Jiri Olsa
2013-09-09 14:11 ` David Ahern
2013-09-09 14:31 ` Jiri Olsa
2013-09-09 15:03 ` David Ahern
2013-09-14 18:32 ` David Ahern
2013-09-09 16:06 ` Ingo Molnar
2013-09-10 17:29 ` David Ahern
2013-09-10 6:54 ` Adrian Hunter
2013-09-10 9:15 ` Peter Zijlstra
2013-09-10 8:57 ` Namhyung Kim
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