linux-kernel - Re: [PATCH V2 1/2] perf: Sample additional clock value

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Message-ID: <54EAD6DF.1000709@intel.com>
Date:	Mon, 23 Feb 2015 09:29:35 +0200
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	David Ahern <dsahern@...il.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Pawel Moll <pawel.moll@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: Re: [PATCH V2 1/2] perf: Sample additional clock value

On 20/02/15 19:06, David Ahern wrote:
> On 2/20/15 5:44 AM, Adrian Hunter wrote:
>> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
>> index efe2d2d..9385140 100644
>> --- a/include/linux/perf_event.h
>> +++ b/include/linux/perf_event.h
>> @@ -655,7 +655,7 @@ extern void perf_pmu_migrate_context(struct pmu *pmu,
>>                   int src_cpu, int dst_cpu);
>>   extern u64 perf_event_read_value(struct perf_event *event,
>>                    u64 *enabled, u64 *running);
>> -
>> +u64 perf_sample_clock_pt(void);
> 
> Core functions should not be arch specific. PT == x86.

Actually it was one of the ARM guys that asked for it to be called
"Processor Trace". It was "arch" in V1.

	http://marc.info/?l=linux-kernel&m=142436891806015

But it has been superseded completely by patches from Peter, so it
is not going further anyway.

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