Hi Paul,
I have no actual timings for run time but system monitor showed both cores extensively used throughout.
Thanks for the feedback. At least it didn't blow up! With 2 cores the gain is quite small but worth having none the less (as long as it's reliable). You could just use "time" to output the process times. The ratio of CPU time (user + system) to elapsed will give you an indication of how well the 2 cores were utilised. The time command may be built in to the shell but if you use /usr/bin/time you can give it a -v option and get some useful info out of it. The other useful command is mpstat which can print out times for all of the cores separately, i.e. mpstat -P ALL 1 That reports the times for all cores every second. Cheers, Mark