Kevin Abbey wrote:
Hi Joe,
Can that 9% difference be due to the Intel capability to overclock one core and turn the others off?

Hi Kevin:

Not sure. May investigate at some point, but we should see a marked decrease in speedup over 4 threads on 4 cores if this is the case.

Or is does this Intel feature require manual switch somewhere?

  No 'switches'.  Pure gcc, using -O3 flag, nothing "funky" in the code.

Joe


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Joseph Landman, Ph.D
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