[mvapich-discuss] Possible mvapich bug (possibly not as well).

[Laurence Marks]

I have a highly reproducible, but so far untraceable problem. It could
be due to mvapich, but also not.

In a code which calls the scalapack subroutine PDSYGST (which uses two
distributed matrices), if the matrices are 36927x36927 it works fine;
if they are 38381x38381 it runs forever, i.e.until I kill it.

This behavior occurs for the Intel mkl versions 10.0.3.020,
10.0.4.023, 10.1.0.009 and ifort/icc versions 10.1.015 and 10.1.018.
It occurs for both an April 2008 svn of mvapich, and an svn of a few
days ago. It also occurs with OFED-1.2.5.5 and OFED-1.3.

I would welcome any suggestions.

-- 
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60208, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
Web: www.numis.northwestern.edu
Chair, Commission on Electron Crystallography of IUCR
www.numis.northwestern.edu/IUCR_CED