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SubjectRe: [patch][rfc] optimise resched, idle task
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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