Re: Horrible drive performance under concurrent i/o jobs (dlh problem?)

Roger Larsson (roger.larsson@skelleftea.mail.telia.com)
Fri, 20 Dec 2002 15:27:16 +0100

On Thursday 19 December 2002 15:29, Torben Frey wrote:
> 2 0 4 25292 2292 72056 759548 0 0 30404 20084 820 1149 4 85 11
> 0 1 3 25292 2828 72048 759012 0 0 40716 23772 845 1307 2 62 36
> 0 1 2 25292 3208 72280 758372 0 0 0 16532 573 231 6 13 81
> 1 0 2 25292 3216 72276 758404 0 0 4880 23800 530 264 2 10 88
>

Hmm... No process running but still lots of CPU used.
Are you sure that you run the disks with DMA?

You should also try to take a profile of a run.
(see
man readprofile
and
linux/Documentation/kernel-parameters.txt
profile=2 as a boot option should do)

/RogerL

-- 
Roger Larsson
Skellefteċ
Sweden


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