Re: [OMPI users] values of mca parameters whilst running program

2007-08-03 Thread Glenn Carver
Hi Don, If the error message is about "privileged" memory, i.e. locked or We don't actually get an error message. What we see is the system gradually losing free memory whilst running batch jobs, until such point where it begins swapping like mad and performance plummets (this happens on al

Re: [OMPI users] values of mca parameters whilst running program

2007-08-03 Thread Don Kerr
Glenn, If the error message is about "privileged" memory, i.e. locked or pinned memory, on Solaris you can increase the amount of available privileged memory by editing the /etc/project file on the nodes. Amount available (example of typical value is 900MB): % prctl -n project.max-device-locked-

Re: [OMPI users] Maximum message size for MPI_Send()/MPI_Recv() functions

2007-08-03 Thread Juan Carlos Guzman
Hi George, Allocating memory is one thing. Being able to use it it's a completely different story. Once you allocate the 8GB array can you fill it with some random values ? This will force the kernel to really give you the 8GB of memory. If this segfault, then that's the problem. If not ... the