how many processes is better?

[Yixun Liu]

Hi,
I want to know how many processes is better. My computer is dual processors PC with superthread. According to the exampe ex2 I set the problem domain to 800*200. I set the number of processes to 1,2,4,10 respecively and the runtime is 26, 19, 18, 15 respectively. How many processes is better. In my opinion 4(2processors * 2superthreads) is better based on my computer, but why 10 ran more quickly?

Best,

Yixun
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