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Message-ID: <55896847.8000105@intel.com>
Date: Tue, 23 Jun 2015 17:08:07 +0300
From: Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
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To: Arnaldo Carvalho de Melo <acme@kernel.org>, Jiri Olsa <jolsa@redhat.com>
CC: Jiri Olsa <jolsa@kernel.org>, lkml <linux-kernel@vger.kernel.org>,
        Andi Kleen <ak@linux.intel.com>, David Ahern <dsahern@gmail.com>,
        Ingo Molnar <mingo@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Stephane Eranian <eranian@google.com>
Subject: Re: [PATCHv4 00/27] perf stat: Introduce --per-thread option
References: <1435012588-9007-1-git-send-email-jolsa@kernel.org> <20150622230600.GB8510@kernel.org> <20150623072200.GB749@krava.redhat.com> <20150623140501.GB3489@kernel.org>
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On 23/06/15 17:05, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jun 23, 2015 at 09:22:00AM +0200, Jiri Olsa escreveu:
>> On Mon, Jun 22, 2015 at 08:06:00PM -0300, Arnaldo Carvalho de Melo wrote:
>>> Em Tue, Jun 23, 2015 at 12:36:01AM +0200, Jiri Olsa escreveu:
>>>> adding the possibility to display stat data per thread.
> 
>>>> Allowing following commands and output:
> 
>>>>   $ perf stat  -e cycles,instructions --per-thread -p 30190,30242
> 
>>> While testing Adrian's Intel PT patchkit I realised we have --per-thread
>>> in 'record', wonder if using a long option with the exact same name but
>>> different meanings for 'stat' and 'record'  would cause confusion...
>  
>> I think the name fits for both stat and record.. and both are doing different
> 
> For record it is vague, for stat, it seems to fit.
> 
> For record it really should be --mmap-per-thread, but then we start
> getting what may seem overly long options, but then, its an oddball
> 'record' option...

It is not just the mmap, it is also the perf context. So it is central to
the way perf works.