Con Kolivas wrote: > On Sunday 22 April 2007 02:00, Ingo Molnar wrote: > > * Con Kolivas <[EMAIL PROTECTED]> wrote: > > > > Feels even better, mouse movements are very smooth even under high > > > > load. I noticed that X gets reniced to -19 with this scheduler. > > > > I've not looked at the code yet but this looked suspicious to me. > > > > I've reniced it to 0 and it did not change any behaviour. Still > > > > very good. > > > > > > Looks like this code does it: > > > > > > +int sysctl_sched_privileged_nice_level __read_mostly = -19; > > > > correct. > > Oh I definitely was not advocating against renicing X, I just suspect that > virtually all the users who gave glowing reports to CFS comparing it to SD > had no idea it had reniced X to -19 behind their back and that they were > comparing it to SD running X at nice 0. I think had they been comparing > CFS with X nice -19 to SD running nice -10 in this interactivity soft and > squishy comparison land their thoughts might have been different. I missed > it in the announcement and had to go looking in the code since Willy just > kinda tripped over it unwittingly as well.
I tried this with the vesa driver of X, and reflect from the mesa-demos heavily starves new window creation on cfs-v4 with X niced -19. X reniced to 0 removes these starves. On SD, X reniced to -10 works great. Thanks! -- Al - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
