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

[Nick Piggin]

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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