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Date: Mon, 9 Sep 2013 13:17:49 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Jiri Olsa <jolsa@...hat.com>
Cc: linux-kernel@...r.kernel.org,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...e.hu>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Andi Kleen <ak@...ux.intel.com>,
David Ahern <dsahern@...il.com>
Subject: Re: [PATCHv2 00/25] perf tool: Add support for multiple data file
storage
On Sun, Sep 01, 2013 at 12:36:11PM +0200, Jiri Olsa wrote:
> hi,
> sending the support for multiple file storage. Initial
> RFC is here:
> http://marc.info/?l=linux-kernel&m=137408381902423&w=2
>
> v2 changes:
> - reworked perf mmap size setup to be able to get
> the mmap size value easily later
> - added perf.data read/write test for v2 and v3
> for both endianity
> - added record '-M time' support
So this 0/n post seems to have forgotten to list the rationale for doing
all this..
The only reason I wanted this is so that each thread can write its own
data. The current one file thing is an immense bottle-neck for big
machines.
However your earlier patches didn't do it because of that -- I forgot
why they did it and you're now not telling.
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