I think my question though is this. can one see negative impacts if the compiler gets upgraded regardless of if its gcc or intel.
> > On 07/01/2014 12:17 AM, Matt Wallis wrote: >> On 01/07/14 13:45, Jonathan Aquilina wrote: >>> This question probably sounds like a stupid one, but what difference >>> in an >>> HPC environment and to parallel written code does compiler version >>> make? >> >> Depends on the day of the week, the processor, the code, and your >> cluster really. >> >> Sometimes code from GCC is faster, sometimes code from the Intel >> compiler is faster. >> Some people write code that only compiles with the Intel compiler, or >> link against libraries distributed with the compiler. >> >> Then of course you might have a BlueGene with PPC cores rather than >> x86, and while the difference in performance between GCC for PPC and >> the IBM XL compilers is slight these days, it wasn't always the case. > > One of my researchers has found that his code that is integer-heavy runs > up to 5x faster on our BG/P when compiled with GCC over the same code > compiled with the IBM XL compilers. For floating point heavy codes, the > IBM XL compiles produce much faster code. > >> >> Intel also distributes highly tuned versions of some maths libraries >> with their compilers, and libraries designed for offloading work to >> the the Xeon Phi, without recompiling the application. >> >> And then when it comes time to debug why the application doesn't work, >> commercial compiler suites often come with very good debugging tools. >> >> Matt. >> > > _______________________________________________ > 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
