Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs
From: Philip Martin
Date: Mon Feb 02 2004 - 20:04:33 EST
Andrew Morton <akpm@xxxxxxxx> writes:
> Nick Piggin <piggin@xxxxxxxxxxxxxxx> wrote:
>>
>> Andrew, any other ideas?
>
> There seems to be a lot more writeout happening.
As far as I can see (and hear!) that's true.
> You could try setting /proc/sys/vm/dirty_ratio to 60 and
> /proc/sys/vm/dirty_background_ratio to 40.
Not much different:
2.6.1 (without elevator=deadline)
dirty_ratio:60 dirty_background_ratio:40
245.58user 121.82system 3:31.79elapsed 173%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+3771340minor)pagefaults 0swaps
dirty_ratio:40 dirty_background_ratio:10 (the defaults)
245.75user 121.33system 3:35.13elapsed 170%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+3770826minor)pagefaults 0swaps
--
Philip Martin
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