Re: [HTCondor-users] Cannot use multiple arguments to run MPI application in "parallel" universe

[Tiger Hu <hufh2004@xxxxxxxxx>]

Hi Jason,

Thanks for your reply. I have some special requirements, thus have to specify different arguments for mpiProgram. I notice that machine counts in multiple queue sections are added up, I am not sure if condor will 

Combine all the arguments, if so, how does it work?

Thanks again.

Sent from my iPhone

å 2018å10æ30æïäå5:50ïJason Patton <jpatton@xxxxxxxxxxx> åéï

hufh,

The way openmpiscript works is that mpirun is executed on a head node, which then sets up worker processes on all of the nodes. Setting up the worker processes includes passing arguments that were passed to mpirun on the head node. Thus, only arguments that are passed to the head node ("args1") will be reflected in your mpi application. I believe this is how mpirun works in general... I'm not aware of how to pass per-worker argument lists to mpi applications.

What is it that your job is trying to accomplish? Is "mympiapp" meant to be run with a controlling head process?

Jason

On Fri, Oct 26, 2018 at 11:04 AM hufh <hufh2004@xxxxxxxxx> wrote:

Dear,

I tried to run a OpenMPI application with different arguments by writing two "queue" section in"parallel" universe, 

Here is my submission file:

universe=parallel

executable=/public/openmpiscript

machine_count=2

arguments="mympiapp args1"

queue

machine_count=2

arguments="mympiapp args2"

queue

I am expecting that two "mympiapp" instances running with "args1" and "args2" respectively, each running on two machines, but the reality is that only the first one("mympiapp args1") is running, but on four machines, not two machines, looks like it is using the resource claimed in two queues).

Who can give me hand? Thanks a lot.

hufh

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