Re: Intel P6 vs P7 system call performance

Benjamin LaHaise (bcrl@redhat.com)
Tue, 17 Dec 2002 16:39:54 -0500

On Tue, Dec 17, 2002 at 11:11:19AM -0800, H. Peter Anvin wrote:
> > against 0xfffffxxx and "rollback" (or complete) any incomplete
> > gettimeofday call prior to saving a task's state. but i bet that test is
> > undesirable on all interrupt paths.
> >
>
> Exactly. This is a real problem.

No, just take the number of context switches before and after the attempt
to read the time of day.

-ben

-- 
"Do you seek knowledge in time travel?"
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