using strace with mpiexec

Question

How do I strace all processes of MPI parallel job, started with mpiexec (MPICH2, linux)?

-o will mess outputs from different processes

PS To some editors: who may think that MPICH is the name of the library. MPICH2 is a particular version.. MPICH2 is actually MPICH2 is an all-new implementation of MPI and I sometimes had to used both mpich and mpich2. So, we can't replace mpich2 with mpich.

score 1 · Answer 1 · answered Jun 07 '10 at 16:01

1

You may want to try STAT (Stack Trace Analysis Tool). Check out the STAT Homepage. It will give you a high level overview of your process behavior, and works especially well in the case of a hung process.

answered Jun 07 '10 at 16:01

Jharrod LaFon

545
4
6

sorry. this project is interesting, but i can't run it on target platform (StackWalker API is not ported, but strace is). – osgx Jun 08 '10 at 09:01
1

What platform is it? Try using gcc 4.1.2, we've had problems compiling with newer versions (StackWalker specifically). – Jharrod LaFon Jun 08 '10 at 15:53

score 1 · Accepted Answer · answered Jul 03 '10 at 11:05

1

Create a wrapper around your program, which will be launched by mpiexec. Something like:

#!/bin/sh
LOGFILE="strace-$(hostname).$$"
exec strace -o"$LOGFILE" my_mpi_program

answered Jul 03 '10 at 11:05

Roman Cheplyaka

37,738
7
72
121

1

It's ok, file names still will be different due to $$ part -- it is the PID of the current process. – Roman Cheplyaka Jul 04 '10 at 08:12

using strace with mpiexec

2 Answers2