linux-kernel - Re: [patch 0/3] [Announcement] Performance Counters for Linux

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Message-Id: <20081205.002701.172921476.davem@davemloft.net>
Date:	Fri, 05 Dec 2008 00:27:01 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	akpm@...ux-foundation.org, eranian@...glemail.com,
	dada1@...mosbay.com, robert.richter@....com, arjan@...radead.org,
	hpa@...or.com, rostedt@...dmis.org
Subject: Re: [patch 0/3] [Announcement] Performance Counters for Linux

From: Ingo Molnar <mingo@...e.hu>
Date: Fri, 5 Dec 2008 09:24:31 +0100

> Right now we begun with the most trivial ones:
> 
>   enum perf_record_type {
>           PERF_RECORD_SIMPLE,
>           PERF_RECORD_IRQ,
>   };
> 
> ... but it would be natural to do a PERF_RECORD_GP_REGISTERS as well. 
> Perhaps even a PERF_RECORD_STACKTRACE using the sysprof facilities, to do 
> a hierarchic multi-dimension profile that sysprof does so nicely.

Maybe even add something like PERF_RECORD_THE_MOON...

see how rediculious this is?

It's not your business in the kernel to decide what things are
useful.  The monitor can stop the task and inspect whatever
it wants with _existing_ facilities.  We need none of this stuff.
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