linux-kernel - Re: [PATCH 2/2] perf record: mmap output file

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Date:	Mon, 11 Nov 2013 11:58:04 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
	jolsa@...hat.com, Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mike Galbraith <efault@....de>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 2/2] perf record: mmap output file - v4

Em Mon, Nov 11, 2013 at 12:29:06PM +0100, Ingo Molnar escreveu:
> * David Ahern <dsahern@...il.com> wrote:

> > shows a drop in time, CPU cycles, and instructions all drop by more than a
> > factor of 3. Jiri also ran a test that showed a big improvement.
> > 
> > v4: Refactoring per Ingo's comments
> > 
> > v3: Removed use of bytes_at_mmap_start at the stat() that set it
> >     Added user option to control the size of the mmap for writing file.
> > 
> > v2: Removed msync call before munmap per Jiri's suggestion

> Looks very clean now!
 
> Acked-by: Ingo Molnar <mingo@...nel.org>

Applied the prep patch, but waiting for v5 as stated by David when
answering Jiri's concerns.

- Arnaldo
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