linux-kernel - Re: [RFC/PATCH 00/14] perf record: Add support to store data in directory

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Date:   Mon, 4 Feb 2019 11:36:43 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC/PATCH 00/14] perf record: Add support to store data in
 directory

On Mon, Feb 04, 2019 at 01:12:11PM +0300, Alexey Budankov wrote:
> 
> Hi,
> 
> On 03.02.2019 18:30, Jiri Olsa wrote:
> > hi,
> > this patchset adds the --dir option to record command (and all
> > the other record command that overload cmd_record) that allows
> > the data to be stored in directory with multiple data files.
> > 
> > It's next step for multiple threads implementation in record.
> > It's now possible to make directory data via --dir option, like:
> > 
> >   $ perf record --dir perf bench sched messaging
> 
> Is it possible to name data directory differently from perf.data 
> e.g. using --output option, like this?
> 
>   $ perf record --output result_1 --dir perf bench sched messaging


yep, it's taken into account:

[jolsa@...va perf]$ ./perf record --output result_1 --dir ./perf bench sched messaging
Couldn't synthesize bpf events.
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 10 groups == 400 processes run

     Total time: 0.177 [sec]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.316 MB result_1 (7225 samples) ]

[jolsa@...va perf]$ ll result_1/
total 348
-rw-------. 1 jolsa jolsa 27624 Feb  4 11:35 data.0
-rw-------. 1 jolsa jolsa 56672 Feb  4 11:35 data.1
-rw-------. 1 jolsa jolsa 30824 Feb  4 11:35 data.2
-rw-------. 1 jolsa jolsa 49136 Feb  4 11:35 data.3
-rw-------. 1 jolsa jolsa 22712 Feb  4 11:35 data.4
-rw-------. 1 jolsa jolsa 53392 Feb  4 11:35 data.5
-rw-------. 1 jolsa jolsa 43352 Feb  4 11:35 data.6
-rw-------. 1 jolsa jolsa 46688 Feb  4 11:35 data.7
-rw-------. 1 jolsa jolsa  9068 Feb  4 11:35 header

jirka