[erlang-questions] performance on multicore computer

Jesper Louis Andersen <>
Sat Oct 23 00:37:21 CEST 2010

On Sat, Oct 23, 2010 at 12:24 AM, Jiansen He <> wrote:
> Hi all,
> I write a small program to try parallel computing in Erlang.  However, I
> find that it only use 110-120% CPU.  I running a dual core iMac with
> hyper-threading technology.

When you run erl(1), how many cores does it report?

Is your program parallel, or are you effectively waiting on something
all the time so it is serial?


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