linux-kernel - Re: [PATCH 20/57] perf c2c report: Add dcacheline dimension key

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Date:   Wed, 5 Oct 2016 14:38:54 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
        Don Zickus <dzickus@...hat.com>, Joe Mario <jmario@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 20/57] perf c2c report: Add dcacheline dimension key

On Wed, Oct 05, 2016 at 07:50:36AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Oct 05, 2016 at 07:45:17AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Wed, Oct 05, 2016 at 12:46:12AM +0200, Jiri Olsa escreveu:
> > > On Tue, Oct 04, 2016 at 01:50:12PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > Em Thu, Sep 22, 2016 at 05:36:48PM +0200, Jiri Olsa escreveu:
> > > > > Adding dcacheline dimension key support. It
> > > > > displays cacheline address as hex number.
> > > > > 
> > > > > Using c2c wrapper to standard 'dcacheline' object
> > > > > to defined own header and simple (just address)
> > > > > cacheline output.
> > > > 
> > > > So, at this point I move from:
> > > > 
> > > >   # perf c2c report
> > > >    Error: Invalid --fields key: `dcacheline'
> > > >   #
> > > > 
> > > > To:
> > > > 
> > > >   [root@...et ~]# perf c2c report
> > > >   Error: Unknown --fields key: `offset'
> > > >   Segmentation fault (core dumped)
> > > >   [root@...et ~]#
> > > 
> > > oops, attached patch should fix that, but I needed to change
> > > following patches:
> 
> Now we're at:
> 
> [root@...et ~]# perf c2c report
>   Error: Unknown --fields key: `offset'
> 0x50cbc0 [0x8]: failed to process type: 68
> failed to process sample
> [root@...et ~]#

well thats because we implicitly sort by offset but
there's no 'offset' ket support yet in your branch

basically the perf report does not display/do anything
till following patch:

  perf c2c report: Add stdio output support

I made sure now that the perf c2c report wont crash
till that patch..

jirka