[haiku] Re: Scheduler (was: Re: Re: Multi-track recording and compositing)
- From: Rene Gollent <anevilyak@xxxxxxxxx>
- To: haiku@xxxxxxxxxxxxx
- Date: Sat, 6 Jun 2009 19:09:06 -0500
2009/6/6 André Braga <meianoite@xxxxxxxxx>:
> scheduler and post the results? Beware that the affine scheduler
> sometimes tend to make a terrible job choosing the CPUs to run a
> thread on, and sometimes the system lags a lot, but sometimes it works
Yes, it's currently suboptimal. I'd intended to work on this further
but due to financial issues I had to hold off on my plans for getting
a multicore box, which makes testing a bit difficult. Right now the
affinity's not quite as hard as it should be, and sometimes there's an
anomaly where a task migrates over onto an already loaded CPU and
stays there. Without an SMP system to test with though,
tuning/correcting those issues is decidedly non-trivial. If someone
wants to jump in and has the requisite hardware, they're more than
welcome to. By and large I'd be somewhat surprised if the results
differed greatly from scheduler_simple in this case though, I suspect
there's probably lock contention issues outside of the scheduler
somewhere that are causing most of the problems.
Regards,
Rene
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