linux-kernel - Re: [PATCH 08/19] perf c2c: Shared data analyser

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Date:	Fri, 28 Feb 2014 17:28:59 -0500
From:	Joe Mario <jmario@...hat.com>
To:	Davidlohr Bueso <davidlohr@...com>
CC:	Don Zickus <dzickus@...hat.com>, Andi Kleen <andi@...stfloor.org>,
	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jolsa@...hat.com, fowles@...each.com, eranian@...gle.com,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Richard Fowles <rfowles@...hat.com>
Subject: Re: [PATCH 08/19] perf c2c: Shared data analyser

Apologies for the resend.  My first msg contained html in it.

On 02/28/2014 04:03 PM, Davidlohr Bueso wrote:
> On Fri, 2014-02-28 at 14:46 -0500, Don Zickus wrote:
>> On Fri, Feb 28, 2014 at 11:08:59AM -0800, Andi Kleen wrote:
>>> Don Zickus <dzickus@...hat.com> writes:
>>>> +
>>>> +static const struct perf_evsel_str_handler handlers[] = {
>>>> +	{ "cpu/mem-loads,ldlat=30/pp", perf_c2c__process_load, },
>>>> +	{ "cpu/mem-stores/pp",	       perf_c2c__process_store, },
>>>
>
> Hmm I'm getting this when running a simple record command.
>
> invalid or unsupported event: 'cpu/mem-loads/pp'
>
> This only occurs with c2c, other subcommands work normally. It's as if
> it were an old kernel, but it's Linus' latest. Is this an issue with the
> patch or something I'm missing?
>
> Furthermore, I see:
> ls /sys/bus/event_source/devices/cpu/events
> branch-instructions  branch-misses  cache-misses  cache-references  cpu-cycles  instructions  mem-loads

David:
  It looks like you're running on an older Intel processor, which is missing necessary events for C2C to work.
  As Don noted in his patch 00/19, this was primarily developed and tested on Intel's Ivy Bridge platform.
  If you rerun this on an Ivy Bridge, it should work fine.
  We should add a runtime check for supported platforms.
Joe

> Thanks!
>
>
>

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