linux-kernel - Re: regression in TSC unstable?

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Date:	Fri, 8 May 2009 14:07:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Len Brown <lenb@...nel.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	john stultz <johnstul@...ibm.com>
Subject: Re: regression in TSC unstable?


* Len Brown <lenb@...nel.org> wrote:

> On Fri, 8 May 2009, Steven Rostedt wrote:
> 
> > The ring-buffer-benchmark module creates a producer and consumer and loops 
> > on do_gettimeofday until it hits about 10 seconds. Then it calculates the 
> > number of events recorded / time running.
> > 
> > After Ingo merged Linus's latest
> 
> merged what into what?
> are you referring to the upstream kernel or something else?

he's describing how he found it: a not-yet-upstream kernel-benchmark 
module showed a performance regression that came in via upstream. 
The regression is upstream too, just harder to notice.

	Ingo
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