On 11/12/16(Sun) 12:54, Stuart Henderson wrote: > On 2016/12/10 17:56, Bryan Vyhmeister wrote: > > On Sat, Dec 10, 2016 at 10:47:31PM +0000, Stuart Henderson wrote: > > > In case anyone is interested, here's a version of this diff against > > > -current. It helps a lot for me. I'm not watching HD video while doing > > > "make -j4", just things like trying to move the pointer around the screen > > > and type into a terminal while a map is loading in a browser. > > > > Thank you for taking the time to update the diff. I should probably try > > it. I have noticed that if I am doing a lot of NFS I/O or rsync > > transfers to an NFS share that the pointer gets jumpy. > > In my case more like "machine freezes every few minutes for 30-40 seconds" > than just jumpy. Loads of IPIs, cpu0 high cpu in interrupt, other cores > 100% cpu in sys. It seems more apparent with chromium, but it's not a > whole lot better with firefox either.
The problem is in librthread. Any multi-threaded program might benefit from this diff. However that's just a bandage. The real fix is to stop using sched_yield(2) when there's some contention in userland.
