Re: [gentoo-user] Re: Kon Colivas is working again on a new scheduler for Desktop/Multimedia/Gaming PCs

[Volker Armin Hemmann <volkerarmin@googlemail.com>]

On Sonntag 06 September 2009, Nikos Chantziaras wrote:
> On 09/06/2009 02:26 AM, Volker Armin Hemmann wrote:
> > On Sonntag 06 September 2009, Nikos Chantziaras wrote:
> >> On 09/06/2009 01:48 AM, Volker Armin Hemmann wrote:
> >>> On Samstag 05 September 2009, Nikos Chantziaras wrote:
> >>>> On 09/05/2009 05:59 PM, Volker Armin Hemmann wrote:
> >>>>>> 1000 Hz timer freq
> >>>>>
> >>>>> change that to 300
> >>>>>
> >>>>>> Did you mean tickless system with "noticks"? I have this enabled ATM
> >>>>>
> >>>>> deactivate that.
> >>>>
> >>>> Even with that, there still are problems.  With composite enabled,
> >>>> move an mplayer window around and see how the video starts to skip big
> >>>> amounts of frames at the moment you start moving and when you "drop"
> >>>> it again.  The compositor takes away CPU time and mplayer starves for
> >>>> a short time.  BFS solves this.
> >>>
> >>> nope. No drops. vlc, xine, mplayer. At least no visible drop - and none
> >>> of the three is complaining.
> >>
> >> Well, not here.
> >>
> >>> But there is a pro-tip: use a non-broken X. aka one with
> >>>
> >>> fedora_dont_backfill_bg_none.patch
> >>
> >> I do use that.
> >>
> >>>> Also, have you considered that you got it all backwards?  The kernel
> >>>> configuration tells you that for lower latencies, you should use
> >>>> 1000Hz and PREEMPT.  It even says "Desktop" right there.  Why should I
> >>>> take your word over that of the kernel devs who actually wrote that
> >>>> code?
> >>>
> >>> low latency means bad throughput and that hurts IO.
> >>
> >> GUI stalls still happen with high latency settings.  Doesn't seem to
> >> matter; 300Hz, 1000Hz, tickless or not, PREEMPT or not, multicore
> >> scheduler or not, all the same.  GUI stalls during load.  It only goes
> >> away with Con's scheduler.
> >
> > attached is my config. Because I don't need Con's scheduler for a nice
> > desktop experience.
> 
> Good for you.  I'm attaching mine.
> 
> > What am I doing wrong?
> 
> I don't know.  Maybe it's just that you're as perceptive as the average
> turtle.
> 

and maybe you should decrapify your config a bit? Namespaces? Seccomp? Process 
accounting? no compat vdso?

You really hate performance, do you?