Erlang & Hyperthreading

Ryan Rawson <>
Tue Feb 28 01:47:41 CET 2006


Thanks for that.  I missed it - I didn't see any explicit call out for
tip/snapshots on the download page.

As for performance - surely on a multicpu system with a SMP aware
erlang running, one can expect better performance just by using
multiple kernel threads and gaining the ability to run on several
CPUs?  Actual performance on a single cpu, I wouldn't expect any
performance benefit.

Thanks guys!
-ryan

On 27 Feb 2006 16:39:14 +0100, Bjorn Gustavsson <> wrote:
> We have named our snapshots badly.
>
> There is not much difference between the P11B snapshots with "smp" in their
> name and the ones without "smp". All P11B snapshots include the SMP support.
> At times, the "smp" snapshot might be slightly more bleeding edge.
> To avoid confusion, we will soon remove the snapshots named "smp".
>
> The important thing is how you build. Run configure like this:
>
> ./configure --enable-smp-support --disable-lock-checking
>
> (add any other flags you normally use; build as usual)
>
> Don't expect huge performance gains, or any performance gains at all
> for that matter. Almost all of our work so far has been focused on
> stability.
>
> /Bjorn
>
> "Ulf Wiger \(AL/EAB\)" <> writes:
>
> >
> > Ryan Rawson wrote:
> > >
> > > It would be awesome to get technical preview of multiCPU
> > > aware/capable Erlang.  Or perhaps access to the CVS tip that
> > > contains it.
> >
> > http://www.erlang.org/download/snapshots/otp_src_smp_P11B_2006-02-26.tar
> > .gz
> >
> > /Ulf W
> >
>
> --
> Björn Gustavsson, Erlang/OTP, Ericsson AB
>



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