linux-kernel - Re: [PATCH 2/7] perf: New helper function for pmu name

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Message-ID: <20101006183801.GA13879@linux-sh.org>
Date:	Thu, 7 Oct 2010 03:38:02 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Will Deacon <will.deacon@....com>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Deng-Cheng Zhu <dengcheng.zhu@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH 2/7] perf: New helper function for pmu name

On Wed, Oct 06, 2010 at 08:15:48PM +0200, Robert Richter wrote:
> On 04.10.10 16:44:20, Matt Fleming wrote:
> > Introduce perf_pmu_name() helper function that returns the name of the
> > pmu. This gives us a generic way to get the name of a pmu regardless of
> > how an architecture identifies it internally, e.g. ARM uses an id
> > whereas SH currently uses a string.
> > 
> 
> Matt,
> 
> as an outcome of the discussion we have had in this thread I think we
> agree on the following:
> 
> We extend the generic perf interface with perf_pmu_name() implenting a
> default with the __weak attribute.  On sh we override this function
> and will use it for perf/oprofile string translation. This will be
> implemented in the oprofile function op_name_from_perf_name().
> 
> Later we implement a generic oprofile function that derives the
> cpu_type from perf_pmu_name() in a generic way and add other
> architectures. Thus, we will drop the ARM changes with this patch set.
> 
> Paul,
> 
> please correct me if I am wrong with the above.
> 
That all sounds fine to me, thanks for summarizing!
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