Aron,
Please send to petsc-maint at mcs.anl.gov (to save petsc-user bandwidth)
the -log_summary for 1 node 1 core, 1 node 2 core, 1 node 4 core, 1 node 8
core, 2 node, 1 core per node, 4 node 1 core per node, 8 core 1 core per node,
10 node, 1 core per node.
Barry
On May 26, 2012, at 5:13 PM, Aron Roland wrote:
> Dear All,
>
> I have some question on some recent implementation of PETSc for solving a
> large linear system from a 4d problem on hybrid unstructured meshes.
>
> The point is that we have implemented all the mappings and the solution is
> fine, the number of iterations too. The results are robust with respect to
> the amount of CPU used but we have a scaling issue.
>
> The system is an intel cluster of the latest generation on Infiniband.
>
> We have attached the summary ... with hooefully a lot of informations.
>
> Any comments, suggestions, ideas are very welcome.
>
> We have been reading the threads with that are dealing with multi-core and
> the bus-limitation stuff, so we are aware of this.
>
> I am thinking now on an open/mpi hybrid stuff but I am not quite happy with
> the bus-limitation explanation, most of the systems are multicore.
>
> I hope the limitation are not the sparse matrix mapping that we are using ...
>
> Thanks in advance ...
>
> Cheers
>
> Aron
>
>
>
>
>
> <benchmark.txt>
