linux-kernel - Re: [PATCH V5 0/7] Generalise ARM perf-events backend for oprofile

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Date:	Mon, 11 Oct 2010 20:59:23 +0200
From:	Robert Richter <robert.richter@....com>
To:	Matt Fleming <matt@...sole-pimps.org>
CC:	Will Deacon <will.deacon@....com>,
	Paul Mundt <lethal@...ux-sh.org>,
	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>,
	Peter Zijlstra <peterz@...radead.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 V5 0/7] Generalise ARM perf-events backend for oprofile

On 08.10.10 20:46:15, Matt Fleming wrote:
> The perf-events backend for OProfile that Will Deacon wrote in
> 8c1fc96f6fd1f361428ba805103af0d0eee65179 ("ARM: 6072/1: oprofile: use
> perf-events framework as backend") is of use to more architectures
> than just ARM. Move the code into drivers/oprofile/ so that SH can use
> it instead of the nearly identical copy of its OProfile code.
> 
> The benefit of the backend is that it becomes necessary to only
> maintain one copy of the PMU accessor functions for each architecture,
> with bug fixes and new features benefiting both OProfile and perf.

> Matt Fleming (7):
>   perf: Add helper function to return number of counters
>   perf: New helper function for pmu name
>   oprofile: Make op_name_from_perf_id() global
>   ARM: oprofile: Rename op_arm to oprofile_perf
>   ARM: oprofile: Move non-ARM code into separate init/exit
>   oprofile: Abstract the perf-events backend
>   sh: oprofile: Use perf-events oprofile backend
> 
>  arch/arm/kernel/perf_event.c     |    6 +
>  arch/arm/oprofile/Makefile       |    4 +
>  arch/arm/oprofile/common.c       |  309 +-----------------------------------
>  arch/sh/Kconfig                  |   13 ++
>  arch/sh/kernel/perf_event.c      |   18 ++
>  arch/sh/oprofile/Makefile        |    4 +
>  arch/sh/oprofile/common.c        |  115 +++-----------
>  arch/sh/oprofile/op_impl.h       |   33 ----
>  drivers/oprofile/oprofile_perf.c |  326 ++++++++++++++++++++++++++++++++++++++
>  include/linux/oprofile.h         |    7 +
>  include/linux/perf_event.h       |    2 +
>  kernel/perf_event.c              |    5 +
>  12 files changed, 412 insertions(+), 430 deletions(-)
>  delete mode 100644 arch/sh/oprofile/op_impl.h
>  create mode 100644 drivers/oprofile/oprofile_perf.c

Thanks Matt, I applied your patches to the oprofile tree and merged
them with the core branch. As I already wrote, I modified patch #4 to
fix the compile breakage.

The patches are available for testing in

 git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile.git core

Thanks again,

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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