Re: 2.6.0 performance problems

[Roger Luethi]

On Mon, 29 Dec 2003 17:07:46 -0500, Thomas Molina wrote:
> Execution time for the test was:
> real	13m33.482s
> user	0m33.540s
> sys	0m16.210s
> 
> 
> Under 2.6 top shows:
> user	nice	system	irq	softirq	iowait	idle
> 0.9	0	5.3	0.9	0.3	92.6	0
> 
> Execution time for the test was:
> real	22m42.397s
> user	0m37.753s
> sys	0m54.043s
> 
> I've done no performance tweaking in either case.  Both tests were done 
> immediately after boot up with only the top program running in each case.  
> I'm not sure what other data would be relevant here.  Any thoughts from 
> the group would be appreciated.

I bet this is just yet another instance of a problem we've been
discussing on lkml and linux-mm for several months now (although Linus
asking for DMA presumably means it's not as well known as I thought
it was).

Basically, when you need to resort to paging for getting work done on
2.6 you're screwed. Your bk export takes a lot more memory than you
have RAM in your machine, right?

Check the archives for this thread:
2.6.0-test9 - poor swap performance on low end machines

Roger
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