linux-kernel - Re: [PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode

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Date:   Wed, 14 Jun 2017 09:20:24 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     David Carrillo-Cisneros <davidcc@...gle.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, Simon Que <sque@...omium.org>,
        Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>,
        He Kuang <hekuang@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v4 00/16] perf tool: add meta-data header support for
 pipe-mode

On Tue, Jun 13, 2017 at 11:51:43PM -0700, David Carrillo-Cisneros wrote:
> On Tue, Jun 13, 2017 at 11:55 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> > On Mon, Jun 12, 2017 at 09:29:16PM -0700, David Carrillo-Cisneros wrote:
> >> v4: - Limit write_* functions to page_size.
> >>     - Fixed bugs spotted by Jiri.
> >>     - Add information about pipe-mode to some error messages.
> >
> > looks like this version breaks the normal report
> >
> > [jolsa@...va perf]$ ./perf report --header-only -I
> > [jolsa@...va perf]$
> 
> Is the command simply terminating without any output? I cannot
> reproduce it. In my machines it works:
> 
> $ ./perf report --header-only -I
> # ========
> # captured on: Tue Jun 13 23:49:13 2017
> # hostname : lphh20
> # os release : 4.3.5-smp-801.43.0.0
> # perf version : 4.12.rc4.gf2978e
> # arch : x86_64
> # nrcpus online : 72
> # nrcpus avail : 72
> # cpudesc : Intel(R) Xeon(R) CPU E5-2696 v3 @ 2.30GHz
> # cpuid : GenuineIntel,6,63,2
> # total memory : 264134144 kB
> # cmdline : /root/perf record ls
> # event : name = cycles:pp, , size = 112, { sample_period, sample_freq
> } = 4000, sample_type = IP|TID|TIME|PERIOD, disa
> # sibling cores   : 0-17,36-53
> # sibling cores   : 18-35,54-71
> [SNIP]
> 
> Is your perf.data from the same version?

yes:

[jolsa@...va perf]$ ./perf record kill
kill: not enough arguments
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.016 MB perf.data (7 samples) ]
[jolsa@...va perf]$ ./perf report --header-only -I
[jolsa@...va perf]$ 

but I'm actualy using branch I found in your tree: ccdavid/toup_june12_pipeheaders_00,
maybe it's not the latest

[jolsa@...va perf]$ git log --oneline | head -1
a16f0acca1d2 perf header: add event desc to pipe-mode header


jirka