[MLton-devel] benchmarks on RedHat and FreeBSD
jlouis@diku.dk
jlouis@diku.dk
Thu, 19 Sep 2002 21:51:08 +0200
On Thu, Sep 19, 2002 at 12:21:23PM -0700, Stephen Weeks wrote:
>
> Here are the results for all our usual benchmarks, run on both RedHat
> 7.1 and FreeBSD 4.6.2 vmware machines with 500M RAM, 1.6Ghz.
>
> It looks like FreeBSD is often a lot slower. From looking at a couple
> of runs, I conjecture much of it is due to the absence of mremap and
> zeroing costs on FreeBSD. For example, using a fixed heap of 100m for
> mlyacc cuts the ratio down from 2.5 to 1.6. I don't know what the
> rest of the slowdown could be due to. I suppose for nucleic and zern
> it could be double alignment.
It amazes me. I have always found FreeBSD to be at level with Linux when
it comes to raw performance. The absence of mremap is a design choice as
far as I know.
I need to read more code before I am able to participate fully in this
discussion though.
--
Jesper
God equals root with 4 delta changes
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