Messages in this thread | | | Date | Mon, 03 Jun 2013 11:26:12 +0800 | From | Michael Wang <> | Subject | Re: [RFC PATCH] sched: smart wake-affine |
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On 06/03/2013 11:09 AM, Mike Galbraith wrote: > On Mon, 2013-06-03 at 10:28 +0800, Michael Wang wrote: >> On 05/28/2013 01:05 PM, Michael Wang wrote: >>> wake-affine stuff is always trying to pull wakee close to waker, by theory, >>> this will bring benefit if waker's cpu cached hot data for wakee, or the >>> extreme ping-pong case. >>> >>> And testing show it could benefit hackbench 15% at most. >>> >>> However, the whole stuff is somewhat blindly and time-consuming, some >>> workload therefore suffer. >>> >>> And testing show it could damage pgbench 50% at most. >>> >>> Thus, wake-affine stuff should be smarter, and realise when to stop >>> it's thankless effort. >> >> Is there any comments? > > (I haven't had time to test-drive yet, -rt munches time like popcorn)
I see ;-)
During my testing, this one works well on the box, solved the issues of pgbench and won't harm hackbench any, I think we have caught some good point here :)
Regards, Michael Wang
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