NUMA scheduler broken

Martin J. Bligh (mbligh@aracnet.com)
Fri, 07 Mar 2003 00:30:30 -0800


Something in current -bk breaks the NUMA scheduler.

Kernbench: (make -j N vmlinux, where N = 16 x num_cpus)
Elapsed System User CPU
2.5.64-align 46.29 129.38 567.02 1504.75
2.5.64-bk 153.04 49.05 558.30 395.00

Looks like it's not node-balancing at all and just using one node.
However, I spent a few minutes looking, and can't see anything obvious
that would have caused it.

Will look at it some more tommorow when I wake up, but if any of you
can see what's broken of the top of your head ...

M.

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