https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902513#M11373 I try to use the MKL in an C programm compiled with Visual C++ 2005 on an quadcore pc.<BR /><BR />At the moment the task is only using one of the four processors.<BR /><BR />How can I used all four processors for my programm ?<BR /><BR /> Thu, 17 Apr 2008 15:39:06 GMT xk2379_52 2008-04-17T15:39:06Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902513#M11373 I try to use the MKL in an C programm compiled with Visual C++ 2005 on an quadcore pc.<BR /><BR />At the moment the task is only using one of the four processors.<BR /><BR />How can I used all four processors for my programm ?<BR /><BR /> Thu, 17 Apr 2008 15:39:06 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902513#M11373 xk2379_52 2008-04-17T15:39:06Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902514#M11374 Which MKL routines are you calling ?<BR /><BR />The BLAS 3 routines are multithreaded and anything that depends on it should parallelize. Set the OMP_NUM_THREADS variable to 2 or more and try running your code.<BR /><BR />You may or may not see speedup depending on the type/size of your problem.<BR /> Thu, 17 Apr 2008 16:03:16 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902514#M11374 Tabrez_Ali 2008-04-17T16:03:16Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902515#M11375 I using the LAPACK routines zheevd, zheev and dsyev for matrix diagonalization. Setting of OMP_NUM_THREADS don'nt show any effect.<BR /> Fri, 18 Apr 2008 07:42:18 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902515#M11375 xk2379_52 2008-04-18T07:42:18Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902516#M11376 <P>Which MKL version do you use? What is the size of the problem?</P> <P>dsyev/zheev/zheevd have been threadedin MKL 10.0 quite good. There was a lack of parallelism before that.</P> Fri, 18 Apr 2008 16:23:30 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902516#M11376 Michael_C_Intel4 2008-04-18T16:23:30Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902517#M11377 I use MKL 10.0 to diagonalyze a lot of 81 x 81 complex matrices.<BR /> Mon, 21 Apr 2008 11:02:50 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-full-capcity-of-quadcore-processor-for-calculating/m-p/902517#M11377 xk2379_52 2008-04-21T11:02:50Z