linux-kernel - Re: [PATCH v13 03/14] perf, tools: Use pmu_events

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Date:	Wed, 3 Jun 2015 12:31:07 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	mingo@...hat.com, ak@...ux.intel.com,
	Michael Ellerman <mpe@...erman.id.au>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	namhyung@...nel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 03/14] perf, tools: Use pmu_events_map table to
 create event aliases

On Tue, Jun 02, 2015 at 10:12:03AM -0700, Sukadev Bhattiprolu wrote:
> At run time, (i.e when perf is starting up), locate the specific events
> table for the current CPU and create event aliases for each of the events.
> 
> Use these aliases to parse user's specified perf event.
> 
> Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
> 
> Changelog[v3]
> 	[Jiri Olsa] Fix a memory leak with cpuid.
> 
> Changelog[v2]
> 	[Andi Kleen] Replace the pmu_events_map->vfm field with a simple
> 		generic "cpuid" string and use that string to find the
> 		matching mapfile entry.
> ---
>  tools/perf/arch/powerpc/util/header.c |   11 ++++
>  tools/perf/util/header.h              |    3 +-
>  tools/perf/util/pmu.c                 |  104 ++++++++++++++++++++++++++++-----
>  3 files changed, 104 insertions(+), 14 deletions(-)

I think this patch is doing too much, it should be split into 3 pieces:

  - introduce get_cpuid_str for powerpc
  - introducing __perf_pmu__new_alias/perf_pmu__new_alias functions split
  - adding pmu_add_cpu_aliases functionality

jirka
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