Charm++ parallel programming system

[Phil Miller <mille121 AT illinois.edu>]

On Thu, Jan 28, 2010 at 07:50, 张凯 
<zhangk1985 AT gmail.com>
 wrote:
> hi:
>
> I am a beginner of AMPI and trying to run a MPI program using it. But i
> found a little problem.
>
> Here(
> http://www.mcs.anl.gov/research/projects/mpi/usingmpi/examples/advmsg/nbodypipe_c.htm)
> you can find an example of a MPI program. I have successfully built
> and
> run it using both MPICH and intel MPI.
>
> However, when i running it with AMPI, i found that the program was blocked
> by MPI_Waitall function and never return again.
>
> I just run it with ++local +p2 +vp2 options. Did i miss other options? or
> misconfig AMPI?

I'm seeing the same effect as you describe on a net-linux-x86_64 build
of AMPI from the latest charm sources. We'll look into this and get
back to you.

For reference, the attached code (with added prints) produces the following:

$ ./charmrun nbp +vp 4 20 +p4
Charm++: scheduler running in netpoll mode.
Charm++> cpu topology info is being gathered.
Charm++> Running on 1 unique compute nodes (8-way SMP).
Iteration 9
Iteration 9:0 a
Iteration 9
Iteration 9:0 a
Iteration 9
Iteration 9:0 a
Iteration 9
Iteration 9:0 a
Iteration 9:0 b
Iteration 9:0 b
Iteration 9:0 b
Iteration 9:0 b