https://community.intel.com/t5/Intel-Moderncode-for-Parallel/MKL-multi-threading/m-p/980063#M5711 Hi:<BR />I'm wondering how do I enable the multi-threaded execution of BLAS operations using MKL. The website says it's no effort work, do I need to set some flags when compiling or linking? Does MKL apply some thresholding on the size to determine when to MT and when not?<BR />Thanks<BR />XW Thu, 20 Nov 2003 07:48:17 GMT Deleted_U_Intel 2003-11-20T07:48:17Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/MKL-multi-threading/m-p/980063#M5711 Hi:<BR />I'm wondering how do I enable the multi-threaded execution of BLAS operations using MKL. The website says it's no effort work, do I need to set some flags when compiling or linking? Does MKL apply some thresholding on the size to determine when to MT and when not?<BR />Thanks<BR />XW Thu, 20 Nov 2003 07:48:17 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/MKL-multi-threading/m-p/980063#M5711 Deleted_U_Intel 2003-11-20T07:48:17Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/MKL-multi-threading/m-p/980064#M5712 <DIV></DIV> <DIV></DIV> <DIV></DIV> <DIV></DIV> <DIV></DIV> <DIV>Hello,</DIV> <DIV>Sorry it took so long to respond to your question. Migrating to the new forum software was bumpier than expected.</DIV> <DIV></DIV> <DIV>MKL uses OpenMP for threading. To take advantage of threaded MKL functions, simply set the <STRONG>OMP_NUM_THREADS </STRONG>environment variable to a value greater than one. It's usually best to set <STRONG>OMP_NUM_THREADS </STRONG>less than or equal to the number of processors in your system.</DIV> <DIV></DIV> <DIV>MKL does have internal thresholds to determine whether to perform a computation in parallel or serial. You can also apply your own thresholdsusing the OpenMP API, specifically the<STRONG>omp_set_num_threads </STRONG>function. The online technical notes havesome additional information about <A href="http://www.intel.com/software/products/mkl/docs/mklusel.htm#Using%20MKL%20Parallelism" target="_blank">MKL parallelism</A>.</DIV> <DIV></DIV> <DIV>Please let us know if you have any other questions.</DIV> <DIV></DIV> <DIV>Best regards,</DIV> <DIV>Henry</DIV><P>Message Edited by MADhagabb on <SPAN class="date_text">12-11-2003</SPAN> <SPAN class="time_text">02:44 PM</SPAN></P> Fri, 12 Dec 2003 06:37:19 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/MKL-multi-threading/m-p/980064#M5712 Henry_G_Intel 2003-12-12T06:37:19Z