Re: O(1) scheduler gives big boost to tbench 192

From: Gerrit Huizenga (
Date: Thu May 02 2002 - 19:09:05 EST

In message <20020502173656.A26986@rushmore>, > : writes:
> On an OSDL 4 way x86 box the O(1) scheduler effect
> becomes obvious as the run queue gets large.
> 2.4.19-pre7-ac2 and 2.4.19-pre7-jam6 have the O(1) scheduler.
> At 192 processes, O(1) shows about 340% improvement in throughput.
> The dyn-sched in -aa appears to be somewhat improved over the
> standard scheduler.
> Numbers are in MB/second.

If you are bored, you might compare this to the MQ scheduler

Also, I think rml did a backport of the 2.5.X version of O(1);
I'm not sure if htat is in -ac or -jam as yet.

Rumor is that on some workloads MQ it outperforms O(1), but it
may be that the latest (post K3?) O(1) is catching up?

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