On 11/01/16 23:45, Kevin Oberman wrote: > On Tue, Nov 1, 2016 at 2:36 PM, Jason Harmening <jason.harmen...@gmail.com> > wrote: > >> Sorry, that should be ~*30ms* to get 30fps, though the variance is still >> up to 500ms for me either way. >> >> On 11/01/16 14:29, Jason Harmening wrote: >>> repro code is at http://pastebin.com/B68N4AFY if anyone's interested. >>> >>> On 11/01/16 13:58, Jason Harmening wrote: >>>> Hi everyone, >>>> >>>> I recently upgraded my main amd64 server from 10.3-stable (r302011) to >>>> 11.0-stable (r308099). It went smoothly except for one big issue: >>>> certain applications (but not the system as a whole) respond very >>>> sluggishly, and video playback of any kind is extremely choppy. >>>> >>>> [...] > I eliminated the annoyance by change scheduler from ULE to 4BSD. That was > it, but I have not seen the issue since. I'd be very interested in whether > the scheduler is somehow impacting timing functions or it's s different > issue. I've felt that there was something off in ULE for some time, but it > was not until these annoying hiccups convinced me to try going back to > 4BSD. > > Tip o' the hat to Doug B. for his suggestions that ULE may have issues that > impacted interactivity. > [...]
Not to beat a dead horse, but I've been a non-fan of SCHED_ULE since it was first introduced, and I don't like it even today. I run the distributed.net client on my machines, but even without that, ULE screws interactive behavior. With distributed.net running and ULE, a make buildworld/make buildkernel takes 10 2/3 hours on 10.3-RELEASE on a 6-CPU machine versus 2 1/2 hours on the same machine with 4BSD and distributed.net running. I'm told that SCHED_ULE is the greatest thing since sliced bread for some compute load or other (details are scarce), but I (fortunately) don't often have to run heavy server type loads; and for everyday use (even without distributed.net running), SCHED_4BSD is my choice by far. It's too bad I can't run freebsd_update with it, though. I promise to shut up about this now. -- George _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
