Re: [Apbs-users] APBS source install using Portland compilers
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From: Robert K. <ro...@uc...> - 2006-03-23 17:42:34
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Hi, I would recommend linking APBS on Opterons with the optimized AMD's numerical libraries ACML (http://developer.amd.com/acml.aspx). They provide ACML free, precompiled for most of compilers (not for icc/ifort though - I wonder why :). In my experience, Pathscale (v. 2.1) compiled APBS is faster than GNU (v. 3.4.3) and that in turn faster than PGI (6.0-5) compiled binary. But you are right, the GNU compiler is a pretty good choice on Opterons (and it's free). It will be also interesting to see how well the new, free, Sun's SunStudio x64 (and x86) compilers perform on Opteron. They will be also releasing their optimized BLAS - which is all good news for us :). r. On Thu, Mar 23, 2006 at 02:37:39PM +0100, Andreas Svrcek-Seiler wrote: > > Hi, > >BTW: Does anyone have experience with Opteron/APBS and tell how much > >performance gain I could expect by not using gcc? And has anyone > >experience with gcc v4.X? How does gfortran perform compared to g77? > ...This is - of course - non-authoritative: > A quick and dirty performance comparison seemed to show that > for APBS running on opterons, the runtime difference between > a g77/gfortran compiled version and a i(ntel)fort compiled one was > negligible. I've also seen that the intel compiler produces code > that runs as fast or faster on opterons than opteron-optimized code > produced by the pathscale compilers. So, summing up, as long as you're not > using Pentium4 CPUs (where the difference is usually far greater), > gcc/g77/gfortran might be a good choice. > > good luck > Andreas > > > > > > > > > > > > -- > > ))))) > ((((( > ( O O ) > -------oOOO--(_)--OOOo----------------------------------------------------- > o Wolfgang Andreas Svrcek-Seiler > o (godzilla) > sv...@tb... > .oooO Tel.:01-4277-52733 > ( ) Oooo. > -------\ (----( )-------------------------------------------------------- > \_) ) / > (_/ > > > > ------------------------------------------------------- > This SF.Net email is sponsored by xPML, a groundbreaking scripting language > that extends applications into web and mobile media. Attend the live webcast > and join the prime developer group breaking into this new coding territory! > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 > _______________________________________________ > apbs-users mailing list > apb...@li... > https://lists.sourceforge.net/lists/listinfo/apbs-users |