linux-kernel - Re: [PATCH V6 08/17] perf tools: Add Intel PT support

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Date:	Fri, 26 Jun 2015 16:47:39 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Jiri Olsa <jolsa@...hat.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V6 08/17] perf tools: Add Intel PT support

On 26/06/15 16:41, Arnaldo Carvalho de Melo wrote:
>> Another thing, the intel_bts implementation does not support
>> "instructions" samples because there is no timing information to
>> use to create periodic samples.  But callchains are added only
>> to "instructions" samples so there are no callchains in 'perf report'
>> for intel_bts.  The call information is still available for
> 
> Humm, so IOW, what you say is that we should refuse to run 'record' when
> asking for callchains and intel_bts?

'record' can record other events at the same time which can have callchains.
e.g.

	perf record -g --per-thread -e intel_bts//u,branch-misses:u ls

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