https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DSS-parallel-performance/m-p/864350#M7745 <P>Well, the one thing we know has <EM>not</EM> changed is MKL. So changes in behavior, assuming the same set of parameters are used in both cases, has to be traced back to something different that is happening in the compiled environment.</P> <P>Can you provide a simple example? The only thing that comes to mind is that somehow the data is laid out differently but there might be other causes for such dramatic differences in the behavior of your program as a function of the compiler. I might also suggest that you post to the compiler forum.</P> <P>Bruce</P> Wed, 23 May 2007 22:07:48 GMT Intel_C_Intel 2007-05-23T22:07:48Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DSS-parallel-performance/m-p/864349#M7744 <P>Hello! Now I try to migrate from CVF6.6/MKL 9.0 to IVF 9.1/MKL 9.0. A queston arose as follows. If I call DSS from a code compiled in CVF6.6, solution time is about 23 sec on one core of E6600or 13 sec on two cores. If I run the same program compiled in IVF the solution timesare about 23 sec and 26 seccorrespondingly.I really appreciate if anybody explain what I do wrong?Thanks in advance.</P> Sat, 05 May 2007 10:20:00 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DSS-parallel-performance/m-p/864349#M7744 shesheni 2007-05-05T10:20:00Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DSS-parallel-performance/m-p/864350#M7745 <P>Well, the one thing we know has <EM>not</EM> changed is MKL. So changes in behavior, assuming the same set of parameters are used in both cases, has to be traced back to something different that is happening in the compiled environment.</P> <P>Can you provide a simple example? The only thing that comes to mind is that somehow the data is laid out differently but there might be other causes for such dramatic differences in the behavior of your program as a function of the compiler. I might also suggest that you post to the compiler forum.</P> <P>Bruce</P> Wed, 23 May 2007 22:07:48 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DSS-parallel-performance/m-p/864350#M7745 Intel_C_Intel 2007-05-23T22:07:48Z