Messages in this thread | | | Date | Tue, 16 Apr 2002 18:02:17 -0700 (PDT) | From | Davide Libenzi <> | Subject | RE: Why HZ on i386 is 100 ? |
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On Tue, 16 Apr 2002, Chen, Kenneth W wrote:
> If you change HZ to 1000, you need to change PROC_CHANGE_PENALTY > accordingly. Otherwise, process would get preempted before its time slice > gets expired. The net effect is more context switch than necessary, which > could explain the 10% difference.
that might be the case. i was not running the latsched sampler during that test, that would have helped me in detecting extra task bounces/cs
- Davide
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