From: Adrian Hunter <adrian.hunter@intel.com>
To: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Andi Kleen <ak@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, Jiri Olsa <jolsa@redhat.com>,
Stephane Eranian <eranian@google.com>,
mathieu.poirier@linaro.org, Pawel Moll <pawel.moll@arm.com>
Subject: Re: [RFC PATCH] perf: Add PERF_RECORD_SWITCH to indicate context switches
Date: Fri, 12 Jun 2015 13:34:57 +0300 [thread overview]
Message-ID: <557AB5D1.9050905@intel.com> (raw)
In-Reply-To: <557A2C14.4010804@gmail.com>
On 12/06/15 03:47, David Ahern wrote:
> On 6/11/15 8:15 AM, Peter Zijlstra wrote:
>>> This new PERF_RECORD_SWITCH event does not have those problems
>>> and it also has a couple of other small advantages. It is
>>> easier to use because it is an auxiliary event (like mmap,
>>> comm and task events) which can be enabled by setting a single
>>> bit. It is smaller than sched:sched_switch and easier to parse.
>>
>> Right, so the one wee problem I have is that this only provides sched_in
>> data, I imagine people might be interested in sched_out as well.
>
> Yes and with the option of collecting callchains for sched_out.
So what do you want that is different different from
PERF_COUNT_SW_CONTEXT_SWITCHES? And why?
next prev parent reply other threads:[~2015-06-12 10:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 14:21 [RFC PATCH] perf: Add PERF_RECORD_SWITCH to indicate context switches Adrian Hunter
2015-06-11 14:15 ` Peter Zijlstra
2015-06-11 16:34 ` Andi Kleen
2015-06-11 16:54 ` Peter Zijlstra
2015-06-12 0:47 ` David Ahern
2015-06-12 10:34 ` Adrian Hunter [this message]
2015-06-12 14:21 ` David Ahern
2015-06-12 16:13 ` Adrian Hunter
2015-06-12 11:12 ` Adrian Hunter
2015-06-12 12:09 ` Peter Zijlstra
2015-06-12 12:36 ` Arnaldo Carvalho de Melo
2015-06-12 13:15 ` Adrian Hunter
2015-06-12 13:28 ` Pawel Moll
2015-06-12 13:52 ` Pawel Moll
2015-06-12 14:30 ` David Ahern
2015-06-12 14:29 ` David Ahern
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