Messages in this thread | | | Date | Sat, 25 Oct 2003 04:10:24 +1000 | From | Nick Piggin <> | Subject | Nick's scheduler v17 |
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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.
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