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Hello,

I've been running pardiso_64 on several problems. If I change MKL_NUM_THREADS I can quickly notice that the factorization elapsed time goes down.

However, the back-substitution doesn't seem to be affected by the number of threads. Given that I am solving, one right-hand-side at a time, many, many right-hand-side vectors, I would like the back-substitution to also be parallelized.

Do I need to do anything special to get speedup in this phase?

Thanks.

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Hi,
Did you change value of iparm(25)?
With best regards,
Alexander Kalinkin

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Alexander,
I forgot to mention:
MKLROOT = /opt/intel/composerxe-2011.4.191/mkl

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Artur,
Provide way to send me reproducer in private topic.
With best regards,
Alexander Kalinkin

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