[KLUG Members] X server & nice settings

[Peter Buxton]

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On Tue, Aug 13, 2002 at 09:09:30AM -0400, adam@morrison-ind.com wrote:

> What distro are you using.  My RH72 wokstation doesn't nice X.  I
> reniced X to -10 and now widget painting is very herky-jerky and it
> can hardly keep up with my typing.  It is quite a noticable
> difference.

Maybe the X server is running high enough that it interferes with apps
trying to draw to it. :-) I imagine the client running on a different
machine than the X server makes a huge difference. I also imagine that
preemption helps because it increases the ability of the kernel to mimic
true multitasking: uniprocessor multitasking is always concurrent (fake)
multitasking, and reducing the unbreakable bits of code always helps to
mimic true multitasking.

XMMS had a problem because it tried, on the same uniprocessor
machine, to:

1) Play music, and then
2) Graph the output on the X server.

The two real-time tasks interfered with each other quite a bit.
Low-latency, and then preemption, both make XMMS usable. Before, while
it played, you couldn't drag it across the screen.

Between LL and preemption I recommend whichever works with XFS. They're
such well-behaved patches you can install *both* if you like.(1) ;-)



(1) This may no longer be true, depending.

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