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SubjectGeneral scheduling domains take 2

I have progressed a bit further, and the data structure is slightly

I have done code to build the scheduling description for SMT P4s. It
can be enabled with a new config option although don't try this with
NUMA yet (easy to fix). Note this is quite unlikely to actually do
any good on a pentium 4 because I haven't been able to test it!

The generic scheduling description works nicely on the 16 way NUMAQ
at OSDL and gives results very close to those I was getting before,
so I think I have done a good job at recreating that scheduling policy,
and the scheduling domains doesn't appear to have too much overhead.

The data structure is a bit difficult to understand. I have the start
of a paper here but its
only really worth looking at for the pictures at the end for now.

Questions, comments welcome.


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