Messages in this thread | ![/](/images/icornerl.gif) | | From | Con Kolivas <> | Subject | Re: [PATCH]O20int | Date | Thu, 4 Sep 2003 08:55:45 +1000 |
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On Thu, 4 Sep 2003 05:19, Mike Fedyk wrote: > On Thu, Sep 04, 2003 at 12:53:10AM +1000, Con Kolivas wrote: > > Smaller timeslice granularity for most interactive tasks and larger for > > less interactive. Smaller for each extra cpu. > > > > +#ifdef CONFIG_SMP > > +#define TIMESLICE_GRANULARITY(p) \ > > + (MIN_TIMESLICE * (1 << (MAX_BONUS - CURRENT_BONUS(p))) * \ > > + num_online_cpus()) > > +#else > > +#define TIMESLICE_GRANULARITY(p) \ > > + (MIN_TIMESLICE * (1 << (MAX_BONUS - CURRENT_BONUS(p)))) > > +#endif > > + > > Don't you want to put a max(10,TIMESLICE_GRANULARITY) in there so that the > time slice won't go below 1ms for large proc servers? I'm not sure if it > was you, or someone else but they did some testing to see how the > timeslice length affected the cache warmth, and the major improvements > stopped after 7ms, so 10 might be a good default mimimum.
That works out to 10ms minimum.
Con
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