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

Robert Love
2002-01-13T20:02:04Z

On Sun, 2002-01-13 at 14:46, Andrew Morton wrote:

> I can't say that I have ever seen any significant change in throughput
> of anything with any of this stuff.

I can send you some numbers. It is typically 5-10% throughput increase
under load. Obviously this work won't help a single task on a single
user system. But things like (ack!) dbench 16 show a marked
improvement.

> Benchmarks are well and good, but until we have a solid explanation for
> the throughput changes which people are seeing, it's risky to claim
> that there is a general benefit.

I have an explanation. We can schedule quicker off a woken task. When
an event occurs that allows an I/O-blocked task to run, its time-to-run
is shorter. Same event/response improvement that helps interactivity.

Robert Love