[mpich-discuss] Can I run MPI program without mpirun/mpiexec?

[John Xu]

Hi,

I ended up trying to setup the environment manually myself and got the
program to run
without mpiexec.
However, the process I kicked off does not seems to reflect the number
of processes
I requested.

For example, I set PMI_RANK = 0 and PMI_SIZE=2,
but when I launched cpi, I got the following:

Process 0 of 1 is on (none)
pi is approximately 3.1415926544231332, Error is 0.0000000008333401
wall clock time = 0.000976

The total number of processes is 1 instead of 2.

Any idea of what environment variable I need to set to get the desired
behaviour?

Thanks,
john

On Tue, Feb 23, 2010 at 4:25 PM, John Xu <johnzxu at gmail.com> wrote:
> Hi,
>
> I am trying to start up mpi process in a processor simulator
> environment. So I have the same problem
> as formerly posted in
>  https://lists.mcs.anl.gov/mailman/htdig/mpich-discuss/2009-November/006008.html
>
> Jayesh,
>
> You indicated that there is a way similar to the windows debugging by
> starting processes at manually.
> But it requires two command prompts.
>
> Does it work for a linux environment running SMP with say 2 cores?
>
> Since I only have one dummy term emulated from the simulator, I can
> not get two command prompts.
> Can I setup the environment as in your document and start two
> processes in the background?
>
> thanks,
> john
>
>
> -----------------------------------------------------------
>  Hi,
>  Yes, you can run an MPI program without mpiexec/mpirun. Let us know
> if you have any problems.
>
> Regards,
> Jayesh
> ----- Original Message -----
> From: "junli gu" <gujunli at gmail.com>
> To: mpich-discuss at mcs.anl.gov
> Sent: Friday, November 20, 2009 2:58:30 PM GMT -06:00 US/Canada Central
> Subject: [mpich-discuss] Can I run MPI program without mpirun/mpiexec?
>
>
> Hi everyone:
>
> I want to run mpi program like a normal binary without mpirun/mpiexec
> command, like this: ./mpi_hello . Is this possible?
>
> This is possible only that I can compile mpi program and put all the
> runtime information into a stand alone binary. I don't know if it is
> possible.
>
> Thank you very much!
>
> --
> ************************************************
> Junli Gu--谷俊丽
> Coordinate Science Lab
> University of Illinois at Urbana-Champaign
> ************************************************
>