Re: [2.4.17/18pre] VM and swap - it's really unusable

yodaiken
2002-01-21T16:07:37Z

On Mon, Jan 21, 2002 at 05:05:01PM +0100, Daniel Phillips wrote:
> > I think of "benefit", perhaps naiively, in terms of something that can
> > be measured or demonstrated rather than just announced.
>
> But you see why asap scheduling improves latency/throughput *in theory*,

Nope. And I don't even see a relationship between preemption and asap I/O
schedulding. What make you think that I/O threads won't be preempted by
other threads?

> don't you? As for the measured benefit, there have been a steady stream of
> postive reports on lkml.

I have not seen a single well structured benchmark that shows a significant
difference. I've seen lots of benchmarks with odd mixes of different patches
showing something unknown. How about a simple clear dbench?

>My own experience is that the usability of my
> laptop with its small memory is much improved under heavy IO load.

No comment.

--
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Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com