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Re: compiling linux kernels with GCC 3.0
- To: torvalds at transmeta dot com (Linus Torvalds)
- Subject: Re: compiling linux kernels with GCC 3.0
- From: Joe Buck <jbuck at synopsys dot COM>
- Date: Wed, 10 Oct 2001 15:22:21 -0700 (PDT)
- Cc: jbuck at synopsys dot com (Joe Buck), apl at alum dot mit dot edu, gcc at gcc dot gnu dot org
I wrote:
> > Since we've had some issues with performance regressions, but also have
> > some performance improvements especially for x86
Linus writes:
> Has this actually been verified by _anybody_?
Yes, but the net performance improvements seem to be slight. See
Andreas Jaeger's SPECint 2000 runs. See
http:/www.suse.de/~aj/SPEC/
for a discussion, test conditions, caveats, etc. To jump straight to
the significant results:
http://www.suse.de/~aj/SPEC/reference/gcc-2.95.3.SuSE/CINT2000.048.html
http://www.suse.de/~aj/SPEC/reference/gcc-3.0/CINT2000.186.html
http://www.suse.de/~aj/SPEC/reference/gcc-3.0.1/CINT2000.185.html
The trend is right, 2.95.3 < 3.0 < 3.0.1.
The test platform is an AMD Athlon 1.133Ghz box.