Thanks for the info, Jesús. There's no need to make any benchmark, I just wanted to know if it was worth trying to install ifort 12 at all :)
Marcos 2011/6/9 Jesús Carrete Montaña <[email protected]> > On 09/06/11 16:23, Marcos Veríssimo Alves wrote: > > Jesús, > > > > Thanks for sharing. A few questions: > > > > 1) What mpi are you using? How is it compiled? > > I am using OpenMPI 1.4.3 from the 64-bit version of Debian testing. > > > 2) Do you have benchmarks to compare with previous versions of ifort > > (10.x, 11.x) and perhaps other compilers in the same processors? > > I'm afraid I cannot provide any kind of systematic comparison with > ifort 11: although I was able to compile SIESTA with it in the past, > the resulting binary always turned out to be extremely unreliable, with > frequent SEGFAULTs, and thus basically unusable. Luckily, those > problems seem to have disappeared with ifort 12, at least in my case. > I do have an equivalent version of SIESTA compiled with gfortran for > the same system, using the same OpenMPI framework and the lineal > algebra libraries included in Debian instead of their Intel/MKL > equivalents. The ifort version is noticeably faster, although I tend to > attribute the best part of this speedup to the libraries and not to the > compiler. > If you are interested in the quantitative results of a specific > benchmark which can be run with both versions of SIESTA in a reasonable > amount of time, I'll be happy to help. > > Best, > Jesús >
