Solved: Useful switches for /Qopenmp

Ahmad_Falahatpisheh · ‎07-30-2011

I am trying to use /Qopenmp for my code. Could someone tell me what switches can be beneficial when /Qopenmp is used? Does the switches /Qpar-num-threads=8 specify that I want to use 8 CPU cores for Qopenmp switch (I have two Intel Xeon 3.33GHz processors).

Thanks.

Steven_L_Intel1 · ‎07-30-2011

By default, Intel's OpenMP implementation creates as many threads as there are "execution units" (sockets * cores * threads) in your computer. The option you name forces that number of threads no matter what, and is not recommended.

I don't know that there are options I would specifically recommend for OpenMP use You can use general optimization options such as /O3 and processor-targeting options if you wish.

View solution in original post

Steven_L_Intel1 · ‎07-30-2011

By default, Intel's OpenMP implementation creates as many threads as there are "execution units" (sockets * cores * threads) in your computer. The option you name forces that number of threads no matter what, and is not recommended.

I don't know that there are options I would specifically recommend for OpenMP use You can use general optimization options such as /O3 and processor-targeting options if you wish.