On Fri, 2008-01-25 at 12:34 +0100, Michel Dänzer wrote: > On Fri, 2008-01-25 at 17:54 +1100, Benjamin Herrenschmidt wrote: > > On Wed, 2008-01-23 at 13:42 +0100, Peter Zijlstra wrote: > > > Another question, do you have: > > > CONFIG_FAIR_GROUP_SCHED=y > > > > > > if so, does flipping that off have any effect? > > > > Yes. > > > > Here, I do the test of running 4 times the repro-case provided by Michel > > with nice 19 and a dd eating CPU with nice 0. > > > > Without this option, I get the dd at 100% and the nice 19 shells down > > below it with whatever is left of the CPUs. > > > > With this option, dd gets about 50% of one CPU and the niced processes > > still get most of the time. > > Hmm, interesting. As I said before, I thought I had tested with this > disabled and not seen a difference, but I'll try again to confirm.
So, 2.6.24 final is indeed much better with this disabled, but still not as good as 2.6.23: While I can reliably move a window again while the infinite loop is running, it still stutters badly every couple of seconds. With 2.6.23 this is smooth all the time. -- Earthling Michel Dänzer | http://tungstengraphics.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
