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SubjectRe: Very poor performance with 2.6.4
Andreas Hartmann <andihartmann@freenet.de> wrote:
>
> Now, I tested 2.6.5-rc3-mm4. Same procedure.
> The good news first:
> 2.6.5-rc3-mm4 is nearly as fast as 2.4.25 - it is about 2% slower than
> 2.4.25 (with preemption turned on).
>
> Now the bad news:
> The system-processor-time is unchanged abnormal high: it is 34% (!) higher
> than in 2.4.25 (and about 1% more than in 2.4.6).
>
>
> Btw: Did the other profile outputs help to find the problem?
>
> These are the profile-values for an example run (make of kernel 2.6.5rc2)
> with 2.6.5rc3mm4:

Spending a lot of time on do_softirq() while compiling stuff is peculiar.

What device drivers are running at the time? disk/network/usb/etc?
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