I just ran a two job memory/FPU intensive test under 2.1.85 and got no
performance degradation with having a second Job running on a Dual
Pro-200. Under 2.0.x I used to see about a 20% performance hit on both
jobs. This is a phenominal improvement, I had thought the problem had
been with memory contention but it seems this was kernel related. What
was done to the kernel to make this improvement.
Probably the new IO-APIC stuff. Mingo's done a great job with it.
Boot to an old kernel, do stuff and cat /proc/interrupts.
Boot to a new kernel and repeat.
-Chris
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