linux-kernel - Re: [PATCH 08/12] perf: Carve out mmap helpers for general use

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Date:	Fri, 21 Jan 2011 15:29:37 -0200
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Borislav Petkov <bp@...64.org>
Cc:	peterz@...radead.org, mingo@...e.hu, tony.luck@...el.com,
	rostedt@...dmis.org, fweisbec@...il.com,
	linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
	Borislav Petkov <borislav.petkov@....com>
Subject: Re: [PATCH 08/12] perf: Carve out mmap helpers for general use

Em Fri, Jan 21, 2011 at 04:09:31PM +0100, Borislav Petkov escreveu:
> From: Borislav Petkov <borislav.petkov@....com>
> 
> Export the mmap_read* helpers into tools/lib/perf/mmap.[ch]

Borislav, can you take a look at:

http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=shortlog;h=refs/heads/perf/core

More specifically take a look at the function test__basic_mmap in:

http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=blob;f=tools/perf/builtin-test.c;h=f03798a298b00b328a11f06ce20cc352d123ec28;hb=refs/heads/perf/core

434 /*
435  * This test will generate random numbers of calls to some getpid syscalls,
436  * then establish an mmap for a group of events that are created to monitor
437  * the syscalls.
438  *
439  * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
440  * sample.id field to map back to its respective perf_evsel instance.
441  *
442  * Then it checks if the number of syscalls reported as perf events by
443  * the kernel corresponds to the number of syscalls made.
444  */

I'll read the rest of your patchset to see if there are more things like
this.

- Arnaldo
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