linux-kernel - Re: [BUG] cpufreq: constant cpu

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Message-ID: <20080825123926.GC8663@elte.hu>
Date:	Mon, 25 Aug 2008 14:39:26 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	cpufreq@...r.kernel.org, davej <davej@...emonkey.org.uk>,
	Alok Kataria <akataria@...are.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [BUG] cpufreq: constant cpu_khz


* Peter Zijlstra <peterz@...radead.org> wrote:

> > I noticed that my sched_clock() was slow on a number of machine, so 
> > I started looking at cpufreq.
> 
> The below seems to fix the problem for me, but I don't have enough 
> clue to know if its the correct fix, please advise.

> -	set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
> +	set_cyc2ns_scale(tsc_khz, freq->cpu);

hm, that too is due to the tsc.c unification - Alok Cc:-ed. Applied your 
fix to x86/urgent.

	Ingo
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