From: Frank Rowand <frank.rowand@am.sony.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org>,
Greg KH <greg@kroah.com>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
Peter Zijlstra <peterz@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lttng-dev@lists.lttng.org" <lttng-dev@lists.lttng.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [lttng-dev] [PATCH 09/11] sched: export task_prio to GPL modules
Date: Tue, 20 Dec 2011 13:46:31 -0800 [thread overview]
Message-ID: <4EF10237.8040700@am.sony.com> (raw)
In-Reply-To: <20111220110813.GA19105@elte.hu>
On 12/20/11 03:08, Ingo Molnar wrote:
>
> (Cc:-ing Arnaldo on this as well.)
>
> * Mathieu Desnoyers <compudj@krystal.dyndns.org> wrote:
>
< snip >
> I think your concentration on ABIs is missing a very fundamental
> property of instrumentation:
>
> the life-time and persistence of instrumentation data is
> typically very short ('days' is already an exception - typical
> is minutes, at most hours), and for that reason we havent been
> getting much pressure from users to maintain a perf.data ABI -
> but we are doing it nevertheless.
>
> Instrumentation is fundamentally about the 'here and now' and so
> it fundamentally differs from things like backup formats and
> database formats. An ABI does not hurt and we are maintaining
> it, but you are overrating its importance significantly.
Just to provide visibility to a different use case...
The life time of my data is typically weeks, months, or years
(though I am not likely to re-process year old raw data).
< snip >
-Frank
next prev parent reply other threads:[~2011-12-20 21:47 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1322775683-8741-1-git-send-email-mathieu.desnoyers@efficios.com>
2011-12-01 21:41 ` [PATCH 01/11] mm: export vmalloc_sync_all symbol " Mathieu Desnoyers
2011-12-01 21:57 ` Christoph Hellwig
2011-12-01 22:13 ` Greg KH
2011-12-01 22:19 ` Mathieu Desnoyers
2011-12-01 22:41 ` Greg KH
2011-12-01 22:28 ` Christoph Hellwig
2011-12-01 23:00 ` Greg KH
2011-12-01 21:41 ` [PATCH 03/11] fs/splice: export splice_to_pipe " Mathieu Desnoyers
2011-12-02 7:19 ` Jens Axboe
2011-12-02 12:32 ` Mathieu Desnoyers
2011-12-01 21:41 ` [PATCH 09/11] sched: export task_prio " Mathieu Desnoyers
2011-12-01 21:56 ` Peter Zijlstra
2011-12-01 22:04 ` Mathieu Desnoyers
2011-12-01 22:10 ` Peter Zijlstra
2011-12-01 22:15 ` Mathieu Desnoyers
2011-12-01 22:36 ` Mathieu Desnoyers
2011-12-01 23:05 ` Peter Zijlstra
2011-12-02 13:51 ` Mathieu Desnoyers
2011-12-01 23:06 ` Peter Zijlstra
2011-12-01 23:18 ` Greg KH
2011-12-01 23:47 ` Mathieu Desnoyers
2011-12-01 22:14 ` Greg KH
2011-12-01 22:20 ` Mathieu Desnoyers
2011-12-01 23:07 ` Peter Zijlstra
2011-12-01 23:17 ` Greg KH
2011-12-05 14:17 ` Ingo Molnar
2011-12-06 21:44 ` Greg KH
2011-12-08 5:23 ` Ingo Molnar
2011-12-08 23:27 ` Greg KH
2011-12-19 10:49 ` Ingo Molnar
2011-12-19 15:30 ` [lttng-dev] " Mathieu Desnoyers
2011-12-20 11:08 ` Ingo Molnar
2011-12-20 21:46 ` Frank Rowand [this message]
2011-12-23 10:51 ` Ingo Molnar
2011-12-21 18:47 ` Aaron Spear
2011-12-21 18:58 ` Christoph Hellwig
2011-12-23 16:46 ` Perf ABI (was: Re: [lttng-dev] [PATCH 09/11] sched: export task_prio to GPL modules) Mathieu Desnoyers
2011-12-23 17:21 ` Ted Ts'o
2011-12-23 18:16 ` Mathieu Desnoyers
2011-12-25 17:46 ` Ted Ts'o
2012-01-12 14:09 ` Mathieu Desnoyers
2012-01-12 14:54 ` Steven Rostedt
2012-01-12 15:39 ` [lttng-dev] Perf ABI (was: " Mathieu Desnoyers
2012-01-12 15:53 ` Steven Rostedt
2012-01-12 15:59 ` Steven Rostedt
2012-01-12 16:27 ` Mathieu Desnoyers
2012-01-12 16:34 ` Steven Rostedt
2012-01-12 20:00 ` Greg KH
2012-01-16 8:55 ` Ingo Molnar
2011-12-07 22:57 ` [PATCH 09/11] sched: export task_prio to GPL modules Mathieu Desnoyers
2011-12-08 5:40 ` Ingo Molnar
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