On Tuesday 30 January 2007 17:24, you wrote:
> The bug described back in 2004 in the following message still seems to
exist:
>
> http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-05/4313.html
>
> Essentially, it appears that if a process sleeps before it uses up a
> complete jiffy then no charge is made to its process accounting table.
>
> This problem still exists in the same manner in kernel:
This is a known limitation of tick based accounting used on most
architectures.
It was fixed on s390 and using a cpu timer on every context switch. (IIRC ppc
is now using this infrastructure as well)
see for a http://www.kernel-traffic.org/kernel-traffic/kt20041117_284.html#8
for the first patch in the series.
I dont know if there are plans of using the infrastructure on x86 compatible
platforms. I also dont know it that is actually easy to implement with x86
hardware.
--
Mit freundlichen Grüßen / Best Regards
Christian Borntraeger
Linux Software Engineer zSeries Linux & Virtualization
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