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

From: Daniel Phillips (phillips@bonn-fries.net)
Date: Mon Jan 21 2002 - 11:05:01 EST


On January 21, 2002 04:43 pm, yodaiken@fsmlabs.com wrote:
> On Mon, Jan 21, 2002 at 04:38:59PM +0100, Daniel Phillips wrote:
> > On January 15, 2002 01:39 pm, yodaiken@fsmlabs.com wrote:
> > > My reservation about preemption as an implementation technique is that
> > > it has costs, which seem to be not easily boundable, but not very
> > > clear benefits.
> >
> > To me the benefit is clear enough: ASAP scheduling of IO threads, a
> > simple heuristic that improves both throughput and latency.
>
> 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*,
don't you? As for the measured benefit, there have been a steady stream of
postive reports on lkml. My own experience is that the usability of my
laptop with its small memory is much improved under heavy IO load.

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



This archive was generated by hypermail 2b29 : Wed Jan 23 2002 - 21:00:45 EST