speedup was not optimized while increasing the number of threads

speedup was not optimized while increasing the number of threads

Hi, 

I have installed ubuntu 10.04 in dual boot with windows 7;then I have installed cilk++ in ubuntu 

while running my cilk++ program, the speedup was not optimized while increasing the number of threads.

this problem can be related to the installation of ubuntu in dual boot with windows .? 

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