linux-kernel - Re: [PATCH 0/8] perf: add ability to sample physical data addresses

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Message-ID: <51F7D4B5.7020300@gmail.com>
Date:	Tue, 30 Jul 2013 08:59:01 -0600
From:	David Ahern <dsahern@...il.com>
To:	Stephane Eranian <eranian@...gle.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 0/8] perf: add ability to sample physical data addresses

On 7/30/13 8:53 AM, Stephane Eranian wrote:
> On Tue, Jul 30, 2013 at 4:50 PM, David Ahern <dsahern@...il.com> wrote:
>> On 7/30/13 8:21 AM, Stephane Eranian wrote:
>>>
>>> One thing that bothers me with the MMAP2 approach is that
>>> it forces integration into perf. Now, you will need to analyze
>>> the MMAP2 records. With my sample_type approach, you
>>> simply needed a cmdline option on perf record, and then
>>> you could dump the sample using perf report -D and feed
>>
>>
>> what do you want that is not coming out via perf-script?
>>
> mmap records. Are they passed to scripts?

I don't do much with external scripts, but I do not believe they are 
passed. I use 'perf script -f <opts>' a lot to see the individual 
samples (e.g., tracepoints and software events).

It could easily be adapted to dump mmap events, but does not sound like 
it improves your workload.

David
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