What would I have to do, if i have to use MPI.I mean isnt this true that MPI is for message passing, and the thing that i am trying to do is a kind of message passing ?
Could you please eloborate more on resource manager, what kind of resource manager.
Thanks alot..
Fahad
> From: jsquyres_at_[hidden]
> To: lam_at_[hidden]
> Date: Wed, 13 Feb 2008 14:45:38 -0500
> Subject: Re: LAM: caused collective abort of all ranks
>
> It looks like you're trying to use MPI as a parallel launcher, which
> isn't quite what MPI is for.
>
> Indeed, you're calling execl(), which will replace the MPI process
> with your new /bin/bash process. Therefore, MPI_FINALIZE will not be
> executed. As such, LAM treats that as an error.
>
> Note, too, that system() is technically not supported. It'll work
> fine on TCP and shared memory, but will not work properly on Myrinet
> or IB networks.
>
> You might simply want to use a resource manager to launch your serial
> applications in parallel. That might be a bit easier than using MPI.
>
>
> On Feb 11, 2008, at 10:32 PM, fahad saeed wrote:
>
> > Hello All,
> >
> > I am a MPI newbie and having a problem.I intended to run a binary on
> > different processors, with different data as inputs....i.e.diff
> > files are for processing using same binary.....
> > My binary takes these arguments....
> > binary -in file1 -out file 2
> >
> > file 1 and file 2 change for each node......
> >
> > I wrote a small program( small is what i can write rite now :
> > ( ...)....The code seems to work fine as
> > intended(till it runs...) but exits in between with an error;
> >
> > In the program, the command for each node is given using a small
> > bash file, 1-exec
> > 2-exec etc....
> >
> > error:
> > ##########################
> > rank 3 in job 83 sapphire.bw01.uic.edu_56332 caused collective
> > abort of
> > all ranks exit status of rank 3: return code 0
> > ######################################################
> >
> > The code:
> >
> > #include "mpi.h"
> > #include "stdio.h"
> > #include <unistd.h>
> > int main( int argc, char *argv[] )
> > {
> > int numprocs, myrank,work,namelen;
> > char *file;
> > char processor_name[MPI_MAX_PROCESSOR_NAME];
> >
> >
> >
> > MPI_Init(&argc, &argv );
> > MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
> > MPI_Comm_rank(MPI_COMM_WORLD,&myrank);
> >
> >
> > if (myrank) printf("My process rank ==> %d\n",myrank);
> >
> > if (myrank==1)execl("/bin/bash","bash","1-exec",0);
> > if (myrank==2)execl("/bin/bash","bash","2-exec",0);
> > if (myrank==3)execl("/bin/bash","bash","3-exec",0);
> > if (myrank==4)execl("/bin/bash","bash","4-exec",0);
> > if (myrank==5)execl("/bin/bash","bash","5-exec",0);
> > if (myrank==6)execl("/bin/bash","bash","6-exec",0);
> > if (myrank==7)execl("/bin/bash","bash","7-exec",0);
> > if (myrank==8)execl("/bin/bash","bash","8-exec",0);
> > if (myrank==9)execl("/bin/bash","bash","9-exec",0);
> > if (myrank==10)execl("/bin/bash","bash","10-exec",0);
> > if (myrank==11)execl("/bin/bash","bash","11-exec",0);
> > if (myrank==12)execl("/bin/bash","bash","12-exec",0);
> > if (myrank==13)execl("/bin/bash","bash","13-exec",0);
> > if (myrank==14)execl("/bin/bash","bash","14-exec",0);
> > if (myrank==15)execl("/bin/bash","bash","15-exec",0);
> > if (myrank==16)execl("/bin/bash","bash","16-exec",0);
> >
> > MPI_Finalize();
> > }
> >
> >
> > ****************************
> >
> > Any suggestions.??I tried to find out the possible cause of the
> > error but
> > it was discussed very less.All I could learn was that it might be
> > due to
> > less number of processing units, but I cannot run the above
> > program with
> > even less number of processes for example I have atleast 6 processing
> > units and running the program for even 1 would exit with the error.
> >
> > Thanks alot,
> >
> > Fahad Saeed
> >
> > Helping your favorite cause is as easy as instant messaging. You IM,
> > we give. Learn more. _______________________________________________
> > This list is archived at http://www.lam-mpi.org/MailArchives/lam/
>
>
> --
> Jeff Squyres
> Cisco Systems
>
> _______________________________________________
> This list is archived at http://www.lam-mpi.org/MailArchives/lam/
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