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Re: GCC on SPEC.org
- From: Dara Hazeghi <dhazeghi at yahoo dot com>
- To: Vladimir Makarov <vmakarov at redhat dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Tue, 20 Jan 2004 00:38:31 -0800 (PST)
- Subject: Re: GCC on SPEC.org
--- Vladimir Makarov <vmakarov@redhat.com> wrote:
> Dara Hazeghi wrote:
> > Perhaps we aren't so far off from
> > parity, at least in some areas? Cheers,
> >
> I'd take the comparison with Intel's compiler with a
> grain of salt. The
> testing was made for AMD64 not for Intel P4. Intel
> is focused to
> improve code mainly for their processors.
This is true. But on the other hand, Intel also tunes
their compiler for SPEC a lot more than we've done
(do?). Anyhow, I thought it was a nice sign that we
are a preferred SPEC compiler on at least one arch...
>
> There is one area where we could try to achieve a
> better results. It is
> a peak performance which permits to use a specific
> set of options for
> each SPEC test and characterizes variety and quality
> of compiler
> optimizations. Gcc has much more optimization
> options than Intel's
> one. So there is a possibility to improve SPEC peak
> performance.
While true, the other side is that unfortunately, to
make something run optimally with gcc takes a lot more
tweaking. It'd be awfully nice if we had a -fast that
did what their -O2 did for SPEC, but that's an
argument for another day...
Dara
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