Op 22 apr. 2014, om 16:41 heeft Siarhei Siamashka <[email protected]> het volgende geschreven:
> On Tue, 22 Apr 2014 15:45:23 +0200 > Koen Kooi <[email protected]> wrote: > >> Op 22 apr. 2014, om 15:10 heeft Siarhei Siamashka >> <[email protected]> het volgende geschreven: >>> BTW, forgot to mention that I also have tried the BFS scheduler >>> just for fun. And pushed the patches to this branch: >>> https://github.com/ssvb/linux-sunxi/tree/sunxi-3.4.79-bfs >>> >>> And it fixes at least this particular gtkperf issue. When the BFS >>> patches are applied to sunxi-3.4, the reported gtkperf score is >>> always good even without using explicit taskset. >>> >>> So it indeed looks like either CFS in general, or CFS in linux 3.4, or >>> CFS on ARM does not behave really well for this type of workload. >>> I have also tried to run some gtkperf tests on an x86 laptop running >>> linux 3.4 with xf86-video-fbdev driver, but could not reproduce a >>> similar problem. However unlike what we observed on ARM, the client >>> side gtkperf process does not hugely dominate in CPU usage anymore. >>> On x86, the CPU usage is roughly evenly distributed between the gtkperf >>> process and the Xorg process. This could be the reason why the same >>> strange CFS scheduler behaviour is not triggered there. >>> >>> About the BFS scheduler in general. It might be that its popularity >>> among the low latency responsive linux desktop fans is actually well >>> deserved :-) >>> >>> I would even propose to apply the BFS patches to the sunxi-3.4 kernel >>> (ensuring that we have a superior X11 desktop performance is always >>> nice), but read somewhere that BFS does not play very well with >>> lennartware. Are there many systemd users here? >> >> *raises hand* > > That's great, we got a volunteer ;-) The arch wiki says that it is just > the user sessions feature that is broken: > > https://wiki.archlinux.org/index.php/linux-ck#BFS_patched_kernels_CAN_in_fact_use_systemd > > How important is the support for user sessions? Not at all, I don't use user sessions :) > Could you or anybody > else please cherry pick the BFS patches and test how good or bad they > actually work with the systemd enabled userland in practice? I'll have a try, but after this week, it's release week at work :/ regards, Koen -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
