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Re: Comparison of GCC-4.9 and LLVM-3.4 performance on SPECInt2000 for x86-64 and ARM
- From: Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>
- To: Vladimir Makarov <vmakarov at redhat dot com>, "gcc.gcc.gnu.org" <gcc at gcc dot gnu dot org>
- Date: Tue, 24 Jun 2014 15:36:18 +0100
- Subject: Re: Comparison of GCC-4.9 and LLVM-3.4 performance on SPECInt2000 for x86-64 and ARM
- Authentication-results: sourceware.org; auth=none
- References: <53A98705 dot 10909 at redhat dot com>
On 24/06/14 15:11, Vladimir Makarov wrote:
A few people asked me about new performance comparison of latest GCC
and LLVM. So I've finished it and put it on my site
The comparison is achievable from 2014 link and links under it in
the left frame.
These pages are also achievable as
http://vmakarov.fedorapeople.org/spec/2014/2014.html -- what I
compare, my motivation, major results, and my conclusions.
http://vmakarov.fedorapeople.org/spec/2014/llvmgcc64.html -- The
results of comparison on x86-64 SPECInt2000
http://vmakarov.fedorapeople.org/spec/2014/arm.html -- The
results of comparison on ARM SPECInt2000
On ARM, I note that by default you are generating code for fpu=vfpv3-d16
and armv7-a. Of interest is the fact that you aren't using the Neon unit
at all if you configure the compiler with --with-fpu=vfpv3-d16
Did you add any other architecture specific options to your SPEC2k runs ?
If you need exact numbers they can be found in the tables.
If you have any comments and proposals, please feel free to write
me. I try to take them into account next year.