Question on using MUMPS in PETSC

[Randall Mackie]

When m = n = small (like 50), it works fine. When I set m=n=5000, I see
the same thing, where one process on the localhost is taking >4 G of RAM,
while all other processes are taking 137 M.

Is this the standard behavior for MUMPS? It seems strange to me.

Randy


Matthew Knepley wrote:
> Does it work on KSP ex2?
> 
>   Matt
> 
> On Thu, Jul 31, 2008 at 4:35 PM, Randall Mackie <rlmackie862 at gmail.com> wrote:
>> I've compiled PETSc with MUMPS support, and I'm trying to run a small test
>> problem, but I'm having some problems. It seems to begin just fine, but
>> what I notice is that on one process (out of 64), the memory just keeps
>> going up and up and up until it crashes, while on the other processes,
>> the memory usage is reasonable. I'm wondering if anyone might have any idea
>> why? By the way, my command file is like this:
>>
>> -ksp_type preonly
>> -pc_type lu
>> -mat_type aijmumps
>> -mat_mumps_cntl_4 3
>> -mat_mumps_cntl_9 1
>>
>>
>> Randy
>>
>> ps. This happens after the analysis stage and in the factorization stage.
>>
>>
> 
> 
>