> 5-6% is a lot. ULE has some tuning for makeworld in -current, which > for me reduced it to less than 1% slower than 4BSD (down from 5-10% > slower), for the case of makeworld -j4 over nfs on a 2-CPU system with > the sources pre-cached on the server and objects on a local file system, > and extensive local tuning of makeworld, nfs and network drivers. I > think the tuning in ULE was mainly for a 2-CPU system, because makeworld > seemed to be very bad under ULE only with 2 CPUs. Apparently, it is also > very bad with more CPUs. There are sysctls to modify the ULE tuning.
I found Kris' document here: http://people.freebsd.org/~kris/scaling/mysql.html Which also mentions some ULE tuning. The sched_ule man page doesn't mention what these are. Can someone point me to a document that explains the sysctl tuning I can try? I imagine I would want to tweak one or more of these: kern.sched.preemption: 1 kern.sched.topology: 0 kern.sched.steal_thresh: 2 kern.sched.steal_idle: 1 kern.sched.steal_htt: 1 kern.sched.balance_interval: 133 kern.sched.balance: 1 kern.sched.tryself: 1 kern.sched.affinity: 3 kern.sched.pick_pri: 1 kern.sched.preempt_thresh: 64 kern.sched.interact: 30 kern.sched.slice: 13 But I'm not sure which to try. I did try setting kern.sched.pick_pri to 0, but that hasn't helped the ffmpeg workload at least. Thanks, Josh _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"