[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 03 of 10 v2] xen: sched_credit: let the scheduler know about node-affinity
On Fri, 2012-12-21 at 14:29 +0000, George Dunlap wrote: > > Sorry for that, I probably spent so much time buried, as you where > > saying, in the > > various nested loops and calls, that I lost the context a little bit! :-P > > OK, that makes sense -- I figured it was something like that. Don't > feel too bad about missing that connection -- we're all fairly blind to > our own code, and I only caught it because I was trying to figure out > what was going on. > Yeah, thanks, and no, I won't let this let me down to much, Even if this was quite a big one. After all, that's what we have patch review for! > That's why we do patch review. :-) > Hehe, I see we agree. :-) > Honestly, the whole "steal work" idea seemed a bit backwards to begin > with, but now that we're not just dealing with "possible" and "not > possible", but with "better" and "worse", the work-stealing method of > load balancing sort of falls down. > > [snip] > > But that's kind of a half-baked idea at this point. > Yes, this whole stealing work machinery may be rethought a bit. However, let's get something sane in re NUMA load balancing ASAP, as we planned, and then we'll see whether/how to rework it with both simplicity and effectiveness in mind. > > Ok, I think the problem I was describing is real, and I've seen it > > happening and > > causing performances degradation. However, as I think a good solution > > is going to > > be more complex than I thought, I'd better repost without this > > function and deal with > > it in a future separate patch (after having figured out the best way > > of doing so). Is > > that fine with you? > > Yes, that's fine. > Ok, I'll sort out all your comments and try to post v3 in early January, so that you'll find it in your inbox as soon as you'll be back from vacations! :-) > Thanks, Dario. > Thanks to you, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://retis.sssup.it/people/faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) Attachment:
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