On Fri, May 8, 2009 at 9:33 AM, Mark Hahn <h...@mcmaster.ca> wrote: >> I had no idea that the MIPSPro compiler had been resurrected so I was >> interested to hear about the AMD effort.
Yeah, PathScale ported Open64 to x86 & AMD64 a few years ago... And besides IA64 and x64, China (Chinese Academy of Sciences) ported Open64 to PowerPC & Loongson (the MIPS processor developed by China): http://en.wikipedia.org/wiki/Loongson http://www.capsl.udel.edu/conferences/open64/2009/ > me too, but it brings up a thorny topic: how to compare the performance > of different compilers? the obvious "run it on your code and see" is not > helpful in my case, since my goal is to have a good choice for a large > shared HPC organization (several thousand users currently.) It's hard, and even comparing the performance of the "same" compiler but different versions can be hard. Sometimes adding a new optimization can slow down the overall SPEC mark, and new optimizations with each other, with speedups masking slowdowns. Making sure that a functionally correct compiler is already hard enough, and I think it is almost impossible to get a compiler with no performance regressions. This is especially true when there are multiple components (different front-ends, optimiziers, backends, and at the same time supporting multiple processor micro-architectures), and keep in mind that you (usually) get at least one new development build each week for each component, and each team also has a large number of developers checking in code at the same time! > how about microbenchmarks? codes like polyhedron might be reasonable > to start with. HPCC? byte unix benchmarks? See also: http://developer.amd.com/cpu/open64/AppsAndLibraries/Pages/default.aspx Rayson > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
