DragonFly kernel List (threaded) for 2007-07
DragonFly BSD
DragonFly kernel List (threaded) for 2007-07
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Re: poor performance on big machine


From: "Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>
Date: Mon, 30 Jul 2007 17:54:11 +0200

Simon 'corecode' Schubert wrote:
more data:

- irq21 seems to always carry about half of the number of interrupts atapci1 is carrying.

- over large periods, the % busy of ad6 is at 100%, servicing maybe 350 or even 800 requests/sec. I/O speed then is around 3-10 MB/sec. this is with 1.10 and SMP. I'll try compiling a old-ata kernel now.

Okay, old ata kernel does not help. I'd even be inclined to say "looks even worse", but that might be subjective. We definitely need an I/O scheduler and a low level disk scheduler.


cheers
 simon




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