Messages in this thread | | | Date | Sun, 03 Apr 2005 23:27:45 +1000 | From | Nick Piggin <> | Subject | Re: [patch][rfc] optimise resched, idle task |
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Nick Piggin wrote:
> This actually improves performance noticably (ie. a % or so) on schedule / > wakeup happy benchmarks (tbench, on a dual Xeon with HT using mwait idle). >
Here are some numbers on a 2 socket Xeon with HT and mwait idle.
Average of 3 runs, tbench, single client and single server processes on: samethread samecpu othercpu before patch: 188.684 MB/s 189.237 MB/s 172.306 MB/s after patch : 188.425 MB/s 191.628 MB/s 174.224 MB/s
The improvement on other CPUs should be due to the removal of RMW operations in resched_task.
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