Hi Simon
as the intel quad core cpus are effectively dual dual cores I think I've noticed that cache coherency is affecting the performance of the optimised apps quite considerably (I'll post some examples later tonight as I'm at work at the moment and they block seti@home!
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basically I have a Core2 6300 (dual core), a dual proc 5120 (dual core) machine and a dual proc 5320 (quad core). I was expect similar performance per WU from each machine but the 5120 is about 15% slower than the 6300 and the 5320 is 15% slower than the 5120!
I've started using crunch3r's cpu_affinity capable boinc client but it appears to only of had a small performance improvement. any idea's? do you see a similar issue with your woodcrest 5160 machine when comparing it to Core2 E6700 machines?
also it'd be really nice to add a feature to the benchmarking tool to select to utilise all available cores when bechmarking rather than just one, as this issue doesn't surface with the benchmarking tool.
Cheers
Keith
