Messages in this thread | | | From | Toralf Förster <> | Subject | Re: (ondemand) CPU governor regression between 2.6.23 and 2.6.24 | Date | Mon, 28 Jan 2008 16:16:02 +0100 |
| |
Hello,
At Monday 28 January 2008 Ingo Molnar wrote : > > it splits the CPU time between Xorg (root UID) and desktop apps. This > helps particularly well when there's compile jobs going on, etc. - Xorg good news for all Gentoo users ;)
> So if you have some time to play with this, could you please try the > following experiment. Put the following line into your > /etc/rc.d/rc.local file: > > echo 2 > /sys/kernel/uids/`grep -w dnetc /etc/passwd | cut -d: -f3`/cpu_share > > with group scheduling (CONFIG_FAIR_GROUP_SCHED=y) enabled. Also apply > the patch attached below as well - which fixes some interactivity > problems with group scheduling. > Could you try that kernel and compare it to a FAIR_GROUP_SCHED-disabled > kernel's interactivity, and send us your observations?
With the patch and the sysfs-option my system works ok and last but not least with the expected behaviour compared to a previous kernel.
In addition my first impression is that its responseness is better compared to previous kernel versions and nearly the same compared to a kernel without FAIR_GROUP_SCHED .
Compared to kernel 2.6.23 the 1-liner "time factor 819734028463158891" needs now ~5.61 sec which is a little bit higher than the previous value of 5.44 sec.
Thanks for the solution (BTW b/c FAIR_GROUP_SCHED defaults to "y" I could bet that more peoples run into this case).
-- MfG/Sincerely
Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 [unhandled content-type:application/pgp-signature] | |