Messages in this thread | | | From | Con Kolivas <> | Subject | Re: 2.6.0-test2-mm3 osdl-aim-7 regression | Date | Thu, 7 Aug 2003 12:40:54 +1000 |
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On Thu, 7 Aug 2003 05:10, Cliff White wrote: > > Binary searching (insert gratuitous rant about benchmarks that take more > > than two minutes to complete) reveals that the slowdown is due to > > sched-2.6.0-test2-mm2-A3.
This is most likely the round robinning of tasks every 25ms. The extra overhead of nanosecond timing I doubt could make that size difference (but I could be wrong). There is some tweaking of this round robinning in my code which may help this, but it won't bring it back up to original performance I believe. Two things to try are add my patches up to O12.3int first to see how much (if at all!) it helps, and change TIMESLICE_GRANULARITY in sched.c to (MAX_TIMESLICE) which basically disables it completely. If there is still a drop in performance with this, the remainder is the extra locking/overhead in nanosecond timing.
Con
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