Le_Forgeron <jgr### [at] freefr> wrote:
> Le 17/12/2011 10:13, jhu nous fit lire :
> > "jhu" <nomail@nomail> wrote:
> >> Interesting...
> >>
> >> I was about to start over recompiling boost 1.47 and was in the middle of
> >> reinstalling it before I realized icc wasn't compiling most of it. So I went
> >> back and tried compiling povray 3.7 again, and now it works! I have absolutely
> >> no idea how that happened.
> >
> > Hmm... icc binaries are slower than gcc binaries on this processor. Well, that
> > really wasn't worthwhile, or at least until I get an Intel processor...
>
> Well, any measurement would still be interesting (to me at least).
> (could you give both time of gcc & icc for your processor ?)

Overall fastest time:


FreeBSD 8.2, gcc 4.6, -march=barcelona

  Trace Time:       0 hours  3 minutes 10 seconds (190.466 seconds)
              using 6 thread(s) with 1113.568 CPU-seconds total

Linux results:

Debian 7.0, gcc 4.6.1, -march=barcelona -mfpmath=both
  Trace Time:       0 hours  3 minutes 17 seconds (197.996 seconds)
              using 6 thread(s) with 1181.504 CPU-seconds total

Debian 7.0, icc 12.1, -march=pentium4 -mtune=core2 -msse3
  Trace Time:       0 hours  3 minutes 24 seconds (204.107 seconds)
              using 6 thread(s) with 1221.253 CPU-seconds total

For icc, I couldn't even use -march=core2, otherwise configure wouldn't work. It
must throw in instructions no supported by the AMD processor.

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