On Jun 11, 2009, at 2:20 PM, François Trahay wrote:

The stack trace is from the MX MTL (I attach the backtraces I get with both MX MTL and MX BTL) Here is the program that I use. It is quite simple. It runs ping pongs concurrently (with one thread per node, then with two threads per node, etc.)
The error occurs when two threads run concurrently.

Francois

By specifying --mca pml cm, both traces are using the MTL. To use the BTL, try:

$ mpiexec --mca btl mx,sm,self -machinefile ./joe -np 2 ./ concurrent_ping

or simply:

$ mpiexec -machinefile ./joe -np 2 ./concurrent_ping

Scott

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