[petsc-users] Performance of superlu_dist

[Ormiston, Scott J.]

Desire NUENTSA WAKAM wrote:
> On a multicore node, you may not get a very good speedup if the 
> bandwidth is heavily shared between all the cores. I guess this is what 
> Petsc people have explained here 
> http://www.mcs.anl.gov/petsc/petsc-as/documentation/faq.html#computers
> If you have a multi-socket multicore node, my guess would be to keep one 
> MPI  process on each socket and then to use a multithreaded BLAS (like 
> Goto) inside each socket to keep the cores busy during BLAS operations.
> Hope this helps

It was very helpful.

Merci infiniment.

Scott Ormiston
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