Re: VM: 2.4.10ac4 vs. 2.4.11pre2

Andrea Arcangeli
2001-10-06T22:38:03Z

On Sat, Oct 06, 2001 at 01:20:23PM +0100, chris@scary.beasts.org wrote:
>
> dbench 8 34Mbyte/sec 40Mbyte/sec

dbench wants a very unfair vm behaviour. We must penalize all tasks
except one. I measured a x2 slowdown after Linus introduced
mark_page_accessed after 2.4.10pre11 (but still it was faster than
pre10).

If you want patches to make dbench much faster I can provide them, just
ask, at the moment I just think dbench is a very bad benchmark. I can
implement a /proc/sys/vm/dbench if people wants to post nice numbers
without having to apply patches :).

I'd also like to know what you get using -aa instead of mainline, there
are a few changes that can make a difference in the numbers.

Andrea