Messages in this thread | | | Date | Fri, 24 Oct 2003 13:17:31 -0700 | From | cliff white <> | Subject | Re: Nick's scheduler v17 |
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On Sat, 25 Oct 2003 04:10:24 +1000 Nick Piggin <piggin@cyberone.com.au> wrote:
> Hi, > http://www.kerneltrap.org/~npiggin/v17/ > > Still working on SMP and NUMA. Some (maybe) interesting things I put in are > - Sequential CPU balancing so you don't get a big storm of balances > every 1/4s. > - Balancing is trying to err more on the side of caution, I have to start > analysing it more thoroughly though. > - Attacked the NUMA balancing code. There should now be less buslocked ops / > cache pingpongs in some fastpaths. Volanomark likes it, more realistic > loads > won't improve so much http://www.kerneltrap.org/~npiggin/v17/volano.png > This improvement is NUMA only. > > I haven't had time to reproduce Cliff's serious reaim performance > dropoffs so > they're probably still there. I couldn't reproduce Martin's kernbench > dropoff, > but the 16-way I'm using only has 512K cache which might not show it up. > Okay, i put both v17 patches in the OSDL Patch Lifecycle Manager ( http://www.osdl.org/plm-cgi/plm/ ) sched-v17 is PLM #2251 sched-nopolicy-v17 is PLM #2252
Results asap. cliffw
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