On 04/17/18 17:20, EBFE via freebsd-stable wrote: > On Tue, 17 Apr 2018 09:05:48 -0700 > Freddie Cash <fjwc...@gmail.com> wrote: > >> # Tune for desktop usage >> kern.sched.preempt_thresh=224 >> >> ​Works quite nicely on a 4-core AMD Phenom-II X4 960T Processor >> (3010.09-MHz K8-class CPU) running KDE4 using an Nvidia 210 GPU. > > For interactive tasks, there is a "special" tunable: > % sysctl kern.sched.interact > kern.sched.interact: 10 # default is 30 > % sysctl -d kern.sched.interact > kern.sched.interact: Interactivity score threshold > > reducing the value from 30 to 10-15 keeps your gui/system responsive, > even under high load. > [...]
I suspect my case (make buildworld while running misc/dnetc) doesn't qualify. However, I just completed a SCHED_ULE run with preempt_thresh set to 5, and "time make buildworld" reports: 7336.748u 677.085s 9:25:19.86 23.6% 27482+473k 42147+431581io 38010pf+0w Much closer to SCHED_4BSD! I'll try preempt_thresh=0 next, and I guess I'll at least try preempt_thresh=224 to see how that works for me. -- George
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