Enabling SMP Support for Erlang on Mac OS X
Tuesday, September 11th, 2007If you are working with Erlang on Mac OS X and have installed it via Mac Ports, then you might not be running the SMP enabled erlang.
To check, start erlang as
erlang -smp
If you get:
Argument '-smp' not supported.
Then your erlang was not compiled with SMP. All you’ll need to do is:
sudo port uninstall erlang
sudo port install erlang +smp
Then when you run erlang -smp, you’ll be dropped right into the erlang shell. When you run anything with multiple processes, you’ll see both of your CPU cores active.