Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

Subject: Re: [OMPI users] ScaLapack and BLACS on Leopard
From: Terry Frankcombe (terry_at_[hidden])
Date: 2008-03-06 18:12:58

> Intel ifort is 7.7x faster then Linux g95 on MacPro 3.0 GHz
> Intel ifort is 2.9x faster then Linux g95 on Dual Opteron 1.4 GHz
> Intel ifort is 1.8x faster then Linux g95 on SGI Altix 350 dual
> Itanium2 1.4 GHz
> OS X g95 is 2.7x faster then Linux g95 on a MacPro 2.66 GHz (same
> hardware exactly)

That ordering makes little sense to me. The Intel compilers should be
the most effective on Itanium, where a lot of functionality has been
moved out of hardware and foisted onto the compiler!

Have you done these tests with a recent gfortran? (Certainly the gcc
people would want to know about it as these must be missed
optimisations. But only for the gfortran case.)