linux-kernel - Re: [PATCH V2 0/4] Generalise ARM perf-events backend for oprofile

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Date:	Tue, 31 Aug 2010 13:05:17 +0200
From:	Robert Richter <robert.richter@....com>
To:	Matt Fleming <matt@...sole-pimps.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	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>
Subject: Re: [PATCH V2 0/4] Generalise ARM perf-events backend for oprofile

On 26.08.10 15:09:15, 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.
> 
> Note that I haven't been able to test these patches on an ARM board to
> see if I've caused any regressions. If anyone else could do that I'd
> appreciate it. Though, I have been able to compile this version of the
> series.
> 
> This patch series is based on tip/master.

Matt,

please rebase your next version of this patch set to

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

It contains Will's patches.

Thanks,

-Robert

> 
> Changes from v1:
>  - Prefix the new functons with "oprofile_" instead of "op_".
>  - Fix ARM compilation errors
>  - Move all the oprofile-perf logic into oprofile_perf.c
>  - Include cleanup patch from Will
> 
> Matt Fleming (3):
>   sh: Accessor functions for the sh_pmu state
>   oprofile: Abstract the perf-events backend
>   sh: Use the perf-events backend for oprofile
> 
> Will Deacon (1):
>   oprofile: Handle initialisation failure more gracefully
> 
>  arch/arm/oprofile/Makefile       |    4 +
>  arch/arm/oprofile/common.c       |  228 ++++----------------------------------
>  arch/sh/include/asm/perf_event.h |    2 +
>  arch/sh/kernel/perf_event.c      |   13 ++
>  arch/sh/oprofile/Makefile        |    2 +-
>  arch/sh/oprofile/common.c        |   96 +++-------------
>  arch/sh/oprofile/op_impl.h       |   33 ------
>  drivers/oprofile/oprofile_perf.c |  209 ++++++++++++++++++++++++++++++++++
>  include/linux/oprofile.h         |   12 ++
>  9 files changed, 283 insertions(+), 316 deletions(-)
>  delete mode 100644 arch/sh/oprofile/op_impl.h
>  create mode 100644 drivers/oprofile/oprofile_perf.c
> 
> --
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-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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