no parallel speedup with slepc krylovschur

Toby D. Young tyoung at
Tue Jun 30 08:24:13 CDT 2009

> I want to solve the following generalized eigenvalue problem in parallel:
> However, when I use multiple CPUs, I cannot see any speedup. I am not sure
> whether this is a problem of the matrix or of my system. Can anybody
> please have a look?

This goes against everything I have done with the KrylovSchur solver!

Can you confirm (to yourself and to me) that your system really is using
multiple processors and not multiple threads? If you can answer that I may
take a look at your code. Show me some output please.

How do you invoke your code on the command line? mpicc???



Toby D. Young
Adiunkt (Assistant Professor)
Polish Academy of Sciences
Warszawa, Polska

skype: stenografia

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