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SubjectRe: ide-cs using 100% CPU
Alan Cox wrote:
> On Gwe, 2004-08-06 at 20:33, Hamie wrote:
>>Is 100% CPU not excessive? IIRC my PIII-750 used to use less CPU doing
>>the same job as quick, or even slightly faster...
> PCMCIA IDE is PIO only so it burns CPU. This is one case where
> hyperthreading is nice. Cardbus IDE is a lot better but very little
> exists and we don't currently support hotplug IDE controllers.
>>And should it not use system CPU rather than user CPU?
> Yes - but figure out please if the kernel or userspace is getting that
> wrong ;)

He didn't mention seeing waitio in his stats (or I missed it) so he may
be using old userspace tools which don't show waitio.

Should this show as system or waitio? Typically waitio time can be used
for other thaings and this can't, so perhaps showing it as system is
correct in this case.

-bill davidsen (
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me
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