Re: ide-cs using 100% CPU

[Hamie]

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.
>
>  

Ah right. But would a CF memory card be cardbus anyway?

> > 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 ;)
>
>  

My apologies. It was gkrellm leading me up the garden path on that 
one... Copying about 100MB from a 512MB CF card (25+ photos from my 
camera) vmstat 5 reports 4% usercpu, 96% system cpu. And the response on 
the system is sluggish to say the least. (Moving the pointer in X is 
painful :). gkrell meanwhile on it's cpu graph shows about 30% system, 
and the rest as userCPU. No idea why, I guess till I find out I'll just 
regard gkrellm's cpu graph as a waste of space (To differentiate system 
& user cpu anyway :).


>  

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