Messages in this thread | | | Date | Tue, 13 Apr 1999 11:30:16 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [PATCH] small scheduling optimization |
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On Sun, 11 Apr 1999, Rik van Riel wrote:
> This second patch is just a small optimization to the code calling > the scheduling code. With a program like rc5des running (nice +19) > in the background and NOTHING in the foreground Linux still goes > through the scheduler 50 times a second!
hm, it should only go 5 times a second into the scheduler if this is the only process running. Are you sure that it's 50 times a second? With 5 times a second and 5 usecs per schedule(), it's 0.000025 seconds per 1.0 second overhead, acceptable i think. (also, there is a small bug in your patch, you should hold the runqueue spinlock if you rely on nr_running)
-- mingo
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