Subject: Re: [PATCH 00/11] perf tool: Add PERF_SAMPLE_READ sample read
 support
From: Namhyung Kim <namhyung@kernel.org>
To: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
        linux-kernel@vger.kernel.org,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        Ingo Molnar <mingo@elte.hu>, Paul Mackerras <paulus@samba.org>,
        Corey Ashford <cjashfor@linux.vnet.ibm.com>,
        Frederic Weisbecker <fweisbec@gmail.com>
In-Reply-To: <508AB6FC.3080904@gmail.com>
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Date: Sat, 27 Oct 2012 01:25:30 +0900
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2012-10-26 (금), 10:14 -0600, David Ahern:
> On 10/26/12 9:39 AM, Namhyung Kim wrote:
> >> hm, thats the unique sample_type issue again ;) Once we set
> >> PERF_SAMPLE_READ for event or group, we need to set it for
> >> all other events in session, otherwise the report fails
> >
> > Sorry, I don't understand why we need to set it for all events.  Just
> > setting it for a group is not sufficient?  Please shed some light on
> > this.
> 
> perf does not support multiple sample_types -- all events in the session 
> need to use the same one.

Can I ask why? :)

Thanks,
Namhyung


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