Charm++ parallel programming system

[Christopher Butler <chris.butler AT monash.edu>]

Dear all,

I am beginning to write a parallel application using charm++ and have started running some small scale tests of load balancing using the mpi-linux version of charm++. However, I receive the following warning:

Warning> Randomization of stack pointer is turned on in kernel, thread migration may not work! Run 'echo 0 > /proc/sys/kernel/randomize_va_space' as root to disable it, or try run with '+isomalloc_sync'. 

Yet the program appears to run acceptably within a single system. 

My question is when does this warning matter? or when can it cause the application to crash?

Chris Butler