[erlang-questions] performance on multicore computer

Jiansen He <>
Sat Oct 23 00:42:40 CEST 2010


where shall I run erl(1).  I got this when I start erlang

Erlang R14B (erts-5.8.1) [source] [smp:4:4] [rq:4] [async-threads:0] [hipe]
[kernel-poll:false]

My program should be parallel.  I have a similar Haskell program which could
consume 380% CPU!

Jiansen


On Fri, Oct 22, 2010 at 11:37 PM, Jesper Louis Andersen <
> wrote:

> 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?
>
>
> --
> J.
>


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