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Subject: Re: [-rt] time-related problems with CPU frequency scaling
From: Lee Revell <rlrevell@joe-job.com>
To: woho@woho.de
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>
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Date: Tue, 18 Apr 2006 02:32:27 -0400
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On Tue, 2006-04-18 at 08:11 +0200, Wolfgang Hoffmann wrote:
> So I misunderstood preempt_max_latency. I thought it to be absolute
> time, but it actually is codepath cycles, translated to microseconds
> using the current CPU frequency. Thanks for clarifying.  

They are one and the same.  At 800Mhz the same code patch causes twice
the latency.

Lee