On Sat, 2012-11-03 at 04:33 -0700, Mike Galbraith wrote: > On Fri, 2012-11-02 at 21:09 +0100, Michal Zatloukal wrote: > > > On the new kernel, the nice processes are never starved - even when > > starting a tab-laden chromium session, the processes for BOINC keep > > about 20% CPU each (that is normalized to all CPUs, ie 40% nice load > > on each core). The problem is, the governor now seems to consider the > > non-nice task unable to saturate the CPU, and the cores' frequencies > > are hovering between 1.0 and 1.8 GHz. The scheduler keeps scheduling > > the nice tasks, and the non-nice tasks are progressing much slower, > > caused by the lower CPU speed as well as less processing time > > allocated to them. HD video stutters often, and Chromium takes at > > least 2-3 times longer to fully load. > > Your nice 19 tasks receiving 'too much' CPU when there are other > runnable tasks around sounds like you have SCHED_AUTOGROUP enabled. (forgot to mention: if that's the case, you can add noautogroup to your kernel command line to turn it off if distro turned it on in .config) -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
