[petsc-users] KSP_SpeedUP

Wed Apr 14 19:05:22 CDT 2010

On 14 April 2010 19:07, Pedro Torres <torres.pedrozpk at gmail.com> wrote:
> Thanks, for a quickly reply. I have four nodes (GigaEthernet), each node
> with two Quad Core E5410 at 2.33GHz, Mem 16Gb - DDR2 667Mhz., and definitely
> I'm not have the enough memory bandwidth for a reasonable speedup.
>

Smart process to core binding may help you (mpiexec.hydra -n 4/8
--binding topo:sockets), Open MPI has equivalent functionality

http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager#Process-core_Binding


-- 
Lisandro Dalcin
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