[petsc-dev] KSP run in parallel with GPU

[Matthew Knepley]

On Mon, Apr 25, 2011 at 9:06 AM, Eugene Kozlov <neoveneficus at gmail.com>wrote:

> Hello,
>

To answer any kind of question about performance, we need the full output of
-log_summary.

    Matt


> I am trying to test PETSc capability of solving sparse linear systems
> in parallel with GPU.
>
> I compiled and tried to run example
> src/ksp/ksp/examples/tutorials/ex2.c, which can be executed in
> parallel.
>
> In this example matrix and vectors created using VecSetFromOptions()
> and MatSetFromOptions().
>
> According to the page
> http://www.mcs.anl.gov/petsc/petsc-2/features/gpus.html , I execute
> the program with keys
>
> -vec_type mpicusp -mat_type mpiaijcusp
>
> in parallel on the different number of GPUs. Full command:
>
> cleo-submit -np 1 ex2 -ksp_type cg -vec_type mpicusp -mat_type
> mpiaijcusp -m 800 -n 800
>
> Where 'cleo-submit' is a batch manager utility.
>
> I tested the program on 1, 2 and 3 GPUs. As a result I have output as
> (for 3 GPUs):
>
> Norm of error 0.00012322 iterations 448
> Norm of error 0.00012322 iterations 448
> Norm of error 0.00012322 iterations 448
>
> and run times: 30, 40 and 46 seconds respectively.
>
> What can be a cause of these results?
>
> --
> Best regards,
> Eugene
>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20110425/3cdcf8cb/attachment.html>