> This would make a good discussion point, since it is a topic I am
> highly interested in. Take a process whose nice value is 0. And
> a process that has been niced to +10. What is the expectation there?
The expectation is that the +10 niced program gets half the
CPU time from the 'normal' process.
> I'd _really_ like to have a nice value that says "don't run unless
> you are twiddling your thumbs". Ie a nice 20 perhaps, that says I
> don't want this to run unless there is _nothing_ else to schedule.
I have a patch that does this. But since the patch can trigger
a known race condition (hardly ever happens, I've seen it once
in 4 months) and since I want people to test vanilla 2.2.0-pre*
as much as possible I haven't updated the patch since -132.
Once 2.2.0 stabilizes I'll continue to work on the patch,
in the meantime please ignore my patchlet and forget about
it :)
> But I'd also like to be able to pick a nice value that means
> 'something'. Anybody interested in trying to make something like
> this work? IE at present nice 1, nice 2, etc don't seem to make
> much difference, and would be about as useful as just nice xxx to
> run at +10.
I'll work on this as soon as 2.2 stabilizes. If you really
really want it I might even be persuadable to make a version
for kernel 2.2.0-preWhatever, but don't count on that...
cheers,
Rik -- If a Microsoft product fails, who do you sue?
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| Linux memory management tour guide. riel@nl.linux.org |
| Scouting Vries cubscout leader. http://www.nl.linux.org/~riel |
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