From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
"David S. Ahern" <daahern@cisco.com>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] perf tools: Add reference timestamp to perf header
Date: Mon, 13 Dec 2010 18:23:52 +0100 [thread overview]
Message-ID: <20101213172349.GD1691@nowhere> (raw)
In-Reply-To: <1292260419.6803.300.camel@twins>
On Mon, Dec 13, 2010 at 06:13:39PM +0100, Peter Zijlstra wrote:
> On Mon, 2010-12-13 at 18:11 +0100, Peter Zijlstra wrote:
> >
> > Preferably, yes, but I don't see why we can't break the data file format
> > if we've got good reasons to.
>
> I mean, we pretty much _have_ to break data file format when we want to
> do splice() support.
Because we'll have one file per-cpu?
But perf.data on UP will be sensibly the same as today so I suspect
we won't need to be compatible.
But I guess I am missing something, in which case that probably doesn't
change much the picture. It's not because one day we'll need to break
the format that we can happily do so everyday. Backward compatibility
is important and we should preserve it when it's possible.
next prev parent reply other threads:[~2010-12-13 17:23 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-08 1:54 [PATCH 0/2] perf tools: add reference timestamp and use it in time history dump David Ahern
2010-12-08 1:54 ` [PATCH 1/2] perf tools: Add reference timestamp to perf header David Ahern
2010-12-12 20:16 ` Frederic Weisbecker
2010-12-13 13:15 ` Arnaldo Carvalho de Melo
2010-12-13 16:58 ` Arnaldo Carvalho de Melo
2010-12-13 14:39 ` David S. Ahern
2010-12-13 15:54 ` Frederic Weisbecker
2010-12-13 16:48 ` Arnaldo Carvalho de Melo
2010-12-13 17:09 ` Frederic Weisbecker
2010-12-13 17:11 ` Peter Zijlstra
2010-12-13 17:13 ` Peter Zijlstra
2010-12-13 17:23 ` Frederic Weisbecker [this message]
2010-12-13 17:37 ` Peter Zijlstra
2010-12-13 17:50 ` Frederic Weisbecker
2010-12-13 17:15 ` Frederic Weisbecker
2010-12-13 17:18 ` Peter Zijlstra
2010-12-13 17:22 ` Arnaldo Carvalho de Melo
2010-12-13 17:35 ` Peter Zijlstra
2010-12-13 17:43 ` Arnaldo Carvalho de Melo
2010-12-13 17:51 ` Peter Zijlstra
2010-12-13 18:05 ` Frederic Weisbecker
2010-12-13 18:10 ` Peter Zijlstra
2010-12-13 17:47 ` Peter Zijlstra
2010-12-13 17:49 ` David S. Ahern
2010-12-13 17:57 ` Peter Zijlstra
2010-12-13 18:01 ` David S. Ahern
2010-12-13 18:06 ` Peter Zijlstra
2010-12-13 18:20 ` David S. Ahern
2010-12-13 19:08 ` Arnaldo Carvalho de Melo
2010-12-13 19:15 ` David S. Ahern
2010-12-13 19:22 ` Peter Zijlstra
2010-12-13 19:17 ` Peter Zijlstra
2010-12-13 17:48 ` Peter Zijlstra
2010-12-13 17:14 ` Arnaldo Carvalho de Melo
2010-12-13 17:36 ` David S. Ahern
2010-12-13 17:51 ` Arnaldo Carvalho de Melo
2010-12-08 1:54 ` [PATCH 2/2] perf tools: Add option to show time history of event samples David Ahern
2010-12-08 21:06 ` Arnaldo Carvalho de Melo
2010-12-12 21:32 ` Frederic Weisbecker
2010-12-09 17:18 ` [PATCH 0/2] perf tools: add reference timestamp and use it in time history dump Arnaldo Carvalho de Melo
2010-12-12 21:39 ` Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2010-11-29 23:07 [PATCH 0/2] perf tools: reference timestamp and " David Ahern
2010-11-29 23:07 ` [PATCH 1/2] perf tools: add reference timestamp to perf header David Ahern
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