David,
Again, I don't see any difference with the -fno-gcse flag (yes, it is in
both Makefiles), but the -D_POSIX_SOURCE flag does allow engine/signals.c to
remain unchanged. Also, the switch to gcc2 can be done right in your
gfconfig files by simply specifying:
env "CC=gcc2 ..."
On my G4/1GHz, 133MHz bus, 256KB L2 cache, 1MB L3 cache, 512MB RAM, I get:
sieve=1.39 bubble=1.49 matrix=1.01 fib=1.98
Cool, it finally beats my 500MHz PC ;)
DaR
> -----Original Message-----
> From: Dennis Ruffer [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, September 08, 2002 9:00 PM
> To: [EMAIL PROTECTED]
> Subject: RE: [gforth] OS X 10.2 builds and benchmarks
>
>
> Thanks for reading our docs David. I'll give your
> suggestions a try and let
> you know if I find anything else.
>
> DaR
>
> > -----Original Message-----
> > From: David N. Williams [mailto:[EMAIL PROTECTED]]
> > Sent: Sunday, September 08, 2002 4:35 PM
> > To: [EMAIL PROTECTED]
> > Subject: [gforth] OS X 10.2 builds and benchmarks
> >
> >
> > After installing OS X 10.2 on my laptop, and making use of
> > Dennis Ruffer's experience plus Anton's suggestion about
> > `-fno-gcse`, I was able to build gforth 0.5.0 and figure out a
> > couple of things. What I learned is included here:
> >
> >
> > http://www-personal.umich.edu/~williams/archive/forth/gforth/R
> EADME.osx10.2.html
> >
> >
> http://www-personal.umich.edu/~williams/archive/forth/gforth/dir.html
> >
> > The upshot is that you can avoid the FPE* problem with
> > `-D_POSIX_SOURCE`, and get faster benchmarks with gcc 3.1 by
> > using `-fno-gcse`.
> >
> > But Apple has made it easy to fall back to gcc 2.92.2, and that
> > gives faster benchmarks yet, almost as good as OS X Public Beta.
> > Builds from earlier versions of OS X still run (fast) under OS
> > X 10.2.
> >
> > The benchmarks are reported below.
> >
> > -- David
> >
> > ----------------
> > Gforth-0.5.0 benchmarks, with regs, direct threaded, -O3,
> > Powerbook G3/400MHz, 100MHz bus, 1GB L2 cache, 192MB RAM.
> > We have found that -mcpu=750 makes no measureable difference.
> >
> > Mac OS X 10.2 (Darwin 6.0), gcc version 3.1 20020420 (prerelease)
> > siev.fs
> > real 0m11.500s
> > user 0m11.210s
> > sys 0m0.050s
> > bubble.fs
> > real 0m11.909s
> > user 0m11.470s
> > sys 0m0.010s
> > matrix.fs
> > real 0m9.308s
> > user 0m9.180s
> > sys 0m0.090s
> > fib.fs
> > real 0m14.649s
> > user 0m14.240s
> > sys 0m0.030s
> >
> > Same as above plus -fno-gcse:
> > siev.fs
> > real 0m3.643s
> > user 0m3.340s
> > sys 0m0.030s
> > bubble.fs
> > real 0m4.208s
> > user 0m3.780s
> > sys 0m0.020s
> > matrix.fs
> > real 0m2.988s
> > user 0m2.690s
> > sys 0m0.030s
> > fib.fs
> > real 0m4.649s
> > user 0m4.520s
> > sys 0m0.030s
> >
> > Mac OS X 10.2 (Darwin 6.0), gcc version 2.95.2 19991024 (release)
> > siev.fs
> > real 0m2.540s
> > user 0m2.400s
> > sys 0m0.020s
> > bubble.fs
> > real 0m2.855s
> > user 0m2.680s
> > sys 0m0.050s
> > matrix.fs
> > real 0m1.822s
> > user 0m1.710s
> > sys 0m0.020s
> > fib.fs
> > real 0m3.293s
> > user 0m3.200s
> > sys 0m0.010s
> >
> > Mac OS X Public Beta (Darwin 1.3), gcc version 2.95.2
> > siev.fs
> > real 0m2.498s
> > user 0m2.250s
> > sys 0m0.030s
> > bubble.fs
> > real 0m2.810s
> > user 0m2.660s
> > sys 0m0.020s
> > matrix.fs
> > real 0m1.669s
> > user 0m1.540s
> > sys 0m0.020s
> > fib.fs
> > real 0m2.867s
> > user 0m2.710s
> > sys 0m0.030s
> >
> >
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