Re: 2.6.16-rt1

From: Ingo Molnar
Date: Tue Mar 21 2006 - 16:16:42 EST

* K.R. Foley <kr@xxxxxxxxxx> wrote:

> I haven't had a chance to look into it yet but this combination brings
> with it a significant latency regression, at least as measured by the
> rtc histogram stuff.

can you also measure it via rtc_wakeup, a'ka:

chrt -f -p 98 `pidof 'IRQ 8'`
./rtc_wakeup -f 8192 -t 100000

? I have just tried it, and -rt4 looks pretty good on the latency front
(with all debugging disabled).

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