On 11/07/2011 07:32 PM, Francisco Llaryora wrote:
With the purpose of measuring the SpedUp by changing the number of threads.
I did run fourty times by changing the value OMP_NUM_THREAD from 1 to 40.
I run it in a node with 40 cores Xenon.4 Processors with 10 cores each one.
The next is time in
29.927848//40 threads
Why performance decreased when the number of threads approaches the
number of cores?
What version of gcc resolve this behavior? Or How i resolve this behavior?
The problem is not in the decreased of performance is in the magnitude
with which it does.
I compile my c programm like
