GTK & MPI

[Ian Strascina <istrasci cs nmsu edu>]

I'm just wondering if anyone has any experience using GTK & MPI 
together...  I'm sort of at a dead end...

Basically, I'm running some heavy computation on a Beowulf cluster...  I 
need the main node (the one with the monitor) to do some graphical output 
of the computations...  I have tried this in two ways: 1) I write my MPI 
code, and then start inserting GTK code into it...  I want the main node 
to set up the GUI and then wait for it to start receiving information... 
However, I found out that as soon as this node calls gtk_main, it can no 
longer continue to the rest of its code (the data gathering)...  2) I 
write my GTK code and then insert MPI into it...  I test and have only the 
main node get up all the GUI components...  This would seem to work, but 
when I run it on N nodes, I get N-1 messages saying "Gtk-WARNING **: 
cannot open display:" and these nodes cannot continue with their 
execution...

Does anyone have an idea of how I might get around this (without 
resorting to making two separate processes and IPC)???  Thanks in 
advance...


	- Ian

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