Intel® oneAPI Math Kernel Library
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MKL threading seems using only one core

xian-zhong_guous_cd-
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When we use MKL PARDISO multi-threading on, the PARDISO output does indicate multiple number of processors but using top or ksysguard or the windows Task Manager, we see that only one core is exercised regardless of the number of threads we chose to use.

Major version: 11
Minor version: 1
Update version: 1
Product status:  Product
Build: n20131010
Processor optimization: Intel(R) Advanced Vector Extensions (Intel(R) AVX) Enabled Processor

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Gennady_F_Intel
Moderator
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what is the problem size? it looks like this is the problem not Pardiso but Task Manager. 

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