My Current question is how one would Execute a Perl script through charm++. I have tried using the system call but it does not work if myrinet is the active communcation link.

-- EricBohm - 11 Mar 2008

There is no inherent prohibition in Charm++ preventing the execution of Perl, or any other script via a system call. Sadly, both infiniband and myrinet interconnects have serious problems with programs which make system() calls (essentially anything based on fork() ) after their driver is put into play.

Possible workarounds:

• use ethernet. System calls present no trouble in the baseline net-linux or net-linux-amd64 layers. If you are willing to pay the increased latency cost of ethernet, this should work without trouble.
• Add an embedded interpreter to your program and execute your script using that.
  • python is already available as an extension to charm http://charm.cs.uiuc.edu/manuals/html/charm++/3_22.html
  • NAMD2 includes an embedded tcl which is used by it with no Charm interaction
  • http://search.cpan.org/~rgarcia/perl-5.10.0/pod/perlembed.pod discusses the procedure for doing this with perl
• Wrap some IPC around a version of your script which resides in a separate process which you can interact with via IPC from charm.