PGI User Forum

werneta · Joined: 11 Apr 2007 Posts: 5

Hi -

I've been trying to use pgdbg (6.0) on multiprocess programs (MPI), and it invariably doesn't work. It works perfectly when I try to run a single process on the head node. Whenever I try to run it on any node other than the head node (via the -np x or -nolocal flags), pgdbg sits for about a minute, then I get something like:

mkcolg · Posted: Wed Apr 11, 2007 8:25 pm Post subject:

Hi Tom,

How are you invoking PGDBG? It sounds like you might be trying something like "pgdbg mpirun -np 2 a.out" or "mpirun -n 2 pgdbg a.out". You need to run it from the mpirun script using the "-dbg" flag, ex "mpirun -np 2 -dbg=pgdbg a.out".

Note that PGDBG MPI support is only available with the PGI CDK version of MPICH.

- Mat

werneta · Joined: 11 Apr 2007 Posts: 5

Thanks for the quick reply. I'm running it as you described, i.e. "mpirun -np 4 -dbg=pgdbg a.out".

I'm taking a course in parallel computing, so I'm not sure of the mpich version we're using.

- Tom

mkcolg · Posted: Thu Apr 12, 2007 2:25 pm Post subject:

Hi Tom,

I'm not really sure then. Are you able to run your program without the debugger?

- Mat

werneta · Joined: 11 Apr 2007 Posts: 5

Mat -

Every program I've written runs fine without the debugger.

Tom