RIFS-ES Linux Kernel Scheduler Released

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update:

OMG - thank you so much Chen !

you're da man


kudos to you and Con



in the past there have always been issues when using ZFS + 2 audio streams or other stuff (e.g. scrolling in the web and entering text)

the result was that the computer effectively wasn't usable for anything else than running the backup job of ZFS and playing one audio track with hickups from time to time


currently I'm running geek-sources 3.4.2 with ck-patchset ck2 for 3.4 kernel

BFS 423 patched to 424 (is supposed to fix some i/o interactivity issues) and added your O(1) tweaks


this is the best desktop kernel by far - since EVER


having the data integrity features ZFS available and at the same time fully smooth desktop experience is full win-win in my books



thanks again !


now we only need to convince Con to include those (and/or additional upcoming) tweaks from you into BFS


best of course would be to add BFS to mainline as an option to select for desktop users ...


edit:

ok, there's still the issue that HD videos (720p+) act slightly jerky but the sound in 99% is consistent

so ZFSonLinux still needs some tweaking until it is fully suited for desktop/multimedia usage


can't believe how much the CPU scheduler alone makes a difference in those things




I'm using some additional CFQ tweaks - they also might help:



source: http://unix.stackexchange.com/questi...system-caching

BFS won't be adopted because Con is having argument with the mainline developer. Also, I have found a designing problem that BFS has, is the starvation of sleep task. They can't be scheduled as fair as the cpu-intensive task and as you said, will cause hickup. For example there are 6 task running and there nice value is 0. Five of them are while1 and the remain one is X. All of them should get 16.666% of cpu time. In fact X cannot get 16.666% of cpu time correctly.
Chen