Re: [-rt] time-related problems with CPU frequency scaling

From: Lee Revell
Date: Tue Apr 18 2006 - 02:33:31 EST


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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/