linux-kernel - Re: disabling group leader perf

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Message-ID: <20100912203258.GC16751@elte.hu>
Date:	Sun, 12 Sep 2010 22:32:58 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pavel Machek <pavel@....cz>
Cc:	Avi Kivity <avi@...hat.com>, Pekka Enberg <penberg@...helsinki.fi>,
	Tom Zanussi <tzanussi@...il.com>,
	Fr?d?ric Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-perf-users@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: disabling group leader perf_event


* Pavel Machek <pavel@....cz> wrote:

> On Sun 2010-09-12 20:48:43, Ingo Molnar wrote:
> > 
> > * Avi Kivity <avi@...hat.com> wrote:
> > 
> > >  On 09/12/2010 08:46 AM, Pavel Machek wrote:
> > > >  1- Most (least abstract) specific code: a block of bytecode in the form
> > > >     of a simplified, executable, kernel-checked x86 machine code block -
> > > >     this is also the fastest form. [yes, this is actually possible.]
> > > >Well... if we want to be a bit x86-entric.... can we just reuse ACPI
> > > >interpretter?
> > > 
> > > I hope this was a joke, ACPI won the academy awards for ugliness, 
> > > ..., bad specification, non-generality, and 
> 
> As did i386 instruction set :-).

Are you kidding? The i386 instruction set may be ugly, but it's 
implemented in hardware, which has obvious upsides.

The ACPI AML code is just plain ugly.

	Ingo
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