Messages in this thread | | | Date | Thu, 25 Feb 1999 21:06:20 +1100 | From | Richard Gooch <> | Subject | Re: 2.2.2: 2 thumbs up from lm |
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Ingo Molnar writes: > > On Thu, 25 Feb 1999, Richard Gooch wrote: > > > > The good news is that we haven't even reached the limit > > > yet with scheduler and VM optimizations. With a bit of > > > > Yep. I've got some invasive changes to the scheduler, task structure > > and associated bits and pieces in mind. And nope, it's not the RT > > queue stuff. It's something orthogonal. But it should be good :-) > > what misfeatures (if any) does it fix?
Well, I wouldn't go so far as to say it fixes misfeatures. It's more about optimsations. It basically a result of the RT queue work I did, which showed that performance is being hampered by cache line aliasing.
My basic idea is to pack all the per-task information necessary for the scheduler to walk the run queue (and no more) into a new structure. Call it struct task_sched. This will be the framework for the run queue. All the other cruft is left in struct task and a forwards pointer (and possibly a backwards pointer as well) takes you from the struct task_sched to the struct task.
Regards,
Richard....
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