topic Pardiso multi-core not effective with 411 RHS vectors in Intel® oneAPI Math Kernel Library

Pardiso multi-core not effective with 411 RHS vectors

aykuo — Sun, 04 Apr 2010 01:38:41 GMT

We noticed that many of our test cases do not show performance improvement from 1-core, 2-core, 3-core, to 4-core computers. One case with 411 RHS vectors actually ran a bit slower in 4-core than 1-core. For this case, 95% of CPU is on Pardiso back-substitution. In the 4-core run in a 4-core computer, the Task Manager did show 100% CPU. When running the same case with just 1-core in the same computer, it is also confirmed that Task Manager showed 25% CPU. Do we miss anything?

Pardiso multi-core not effective with 411 RHS vectors

Gennady_F_Intel — Sun, 04 Apr 2010 19:26:18 GMT

What is the size of the input problem?

Pardiso multi-core not effective with 411 RHS vectors

h88433 — Mon, 05 Apr 2010 07:23:39 GMT

The problem is known about andthey are working on it. See the following,

http://software.intel.com/en-us/forums/showthread.php?t=73240&o=d&s=lr