On Mon, May 09, 2016 at 12:48:07PM +0200, Peter Zijlstra wrote: > Hai, > > here be a semi coherent patch series for the recent select_idle_siblings() > tinkering. Happy benchmarking..
I ran a few more rounds of the production benchmarks, and NO_AVG_CPU is consistently faster by about 5% than AVG_CPU. I think what's happening here is the production runs are ramping up load in a finer grained setup than schbench, and production is able to see the AVG_CPU calculations back off the scan too soon (for us anyway). I'm going to play around with schbench to try and model this better, but so far this is a clear win over unpatched v4.6. -chris
