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

[Nikos Chantziaras]

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.