On Wed, 2010-01-20 at 16:09 -0600, Joel Schopp wrote:I've run 3 threads using cpu hotplug to offline 1 of the 4. It's certainly a stupid idea, but there you go.
I can turn that into a conditional branch (case statement) with a shift for the common 1,2,4 cases which should cover all procs available today falling back to a divide for any theoretical future processors that do other numbers of threads.
Look at the cputhreads.h implementation ... Today we only support
power-of-two numbers of threads.