Re: I/O Scheduling results in poor responsiveness

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Les Mikesell wrote:
Can you compare to systems with SCSI drives? I think this is telling you that your disk controller is eating all the CPU when the controller and DMA should be doing all the work.
Are you saying you think that the controller isn't using DMA? You think the controller or driver is just poorly written?
 I will try a SCSI system, but the closest I have is a CentOS 4.6
machine, which using a kernel based on 2.6.9. It is also a server, so I
can't run firefox, thunderbird, xchat, or pidgin on it.

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