Newsgroups: comp.parallel.mpi
From: lusk@donner.mcs.anl.gov (Rusty Lusk)
Subject: Re: MPICH ERROR:more slaves than msg queues
Organization: Argonne National Laboratory
Date: 4 Mar 1998 15:18:09 GMT
Message-ID: <6djrbh$3lm@milo.mcs.anl.gov>

In article <Pine.SGI.3.96.980303171548.21086C-100000@rattler>, "Anand Pillai ('Aa-nun-dh pill-'I)" <anand@ERC.MsState.Edu> writes:
|> I was trying to run the example program pi3 on multiple Sun sparc
|> workstations using a p4pg file. 
|> 
|> MPI: MPICH
|> OS: Solaris
|> Device: ch_p4
|> 
|> When the p4pg file "machines" was:
|> 
|> super1 0 /scr/anand/examples/pi3
|> super2 1 /scr/anand/examples/pi3
|> 
|> "mpirun -p4pg machines pi3" worked fine.
|> 
|> But when I increased number of processes:
|> 
|> super1 0 /scr/anand/examples/pi3
|> super2 2 /scr/anand/examples/pi3
|> 
|> "mpirun -p4pg machines pi3" produced:
|> 
|> rm_19833:  p4_error: create_rm_processes: more slaves than msg queues 
|> 
|> How do I correct this problem?

If you want to have multiple processes passing messages through shared memory,
you need to configure with the -comm=shared option, and your procgroup file
is correct.  If you don't reconfigure, you should not have any numbers bigger
than 1 in your procgroup file.  See the User's Guide for details.

In general, you should send MPICH problems to mpi-bugs@mcs.anl.gov.

Regards,
Rusty Lusk