[Wien] Info please on largest matrix size people have run

[Peter Blaha]

largest matrix size:  75508   (on 64 cpus; i.e. 32 nodes, dual-cpu 3.6 
GHz Xeons + Infiniband; i.e. a rather old (more than 3 years) machine.

ifort 9.0, clustermkl8.0, mvapich-0.9.8

PS: Our sysadmin installed recently ifort10.1, mkl10.0, mvapich-1.0, but 
so far we cannot use mpi across nodes (it just works on a single node). 
One  always gets a stupid mpi.error already at the beginning of the job.


Laurence Marks schrieb:
> I've run into a problem where Iin lapw1  cannot run a matrix of 43695
> whereas 36867 works fine. These sizes are getting close to the sqrt of
> the largest integer, so I suspect a problem in either the intel
> scalapack libraries I am using or the mpi (mvapich).
> 
> I'm going to try and narrow this down and solve this, but I can only
> do it for my architecture. It would be useful to know if anyone has
> run into a similar problem or has run sizes larger than 43695, In both
> cases please provide information about your architecture, compilers,
> mpi.
>