[plug] CPU Performance Measure

[Thomas Sutton]

> 6-cores - single chip
> 4-cores - single chip

> OS: Gentoo 64bit 3.2.1-gentoo-r2
> OS: Redhat 5.7 64 bit 2.6.18-308.el5

Benchmarking is very difficult when more than one variable changes and
also when the test itself necessarily involves several aspects of
system performance.

The difference could be due to a kernel regression, it could be
increased synchronisation overhead for 6 cores, etc, etc. It could be
some combination of the above factors.

Cheers,

Thomas