Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: [2.4.17/18pre] VM and swap - it's really unusable | Date | Mon, 21 Jan 2002 17:05:01 +0100 |
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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.
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