[erlang-questions] Fwd: Chameneos.rednux micro benchmark

Edwin Fine <>
Sun Oct 12 21:03:11 CEST 2008


350% utilization means that 350/400 of the 4 cores are busy (i.e. 87.5%
average CPU utilization). It's quite common to report CPU like that, at
least in my experience.

On Sun, Oct 12, 2008 at 1:49 PM, Isaac Gouy <> wrote:

>
> --- Kevin Scaldeferri <> wrote:
>
> >
> > On Oct 12, 2008, at 12:27 AM, Kenneth Lundin wrote:
> >
> > > Hi,
> > >
> > > It is not at all surprising that the SMP version run much slower
> > than
> > > the non SMP version.
> > > I looked at the program source and what I find there is an
> > > implementation that does not allow very much of
> > > parallell execution.
> >
> > I agree with your analysis, but not with your conclusion.
> >
> > We can expect that the SMP version will not run much faster.
> > However, we might also hope that it does not run orders of magnitude
> > slower.
> >
> > At the moment, pthread based solutions are slaughtering Erlang, and
> > also achieving up to 350% CPU utilization.
>
> Is there some well known understanding of how CPU utilization should be
> reported for multi-core and many-core?
>
> 350% utilization sounds quite wrong - but that's probably just me.
>
>
>
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