id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc
684	a trouble with 64-bit system, Alex Mazheika	Alexej Mazheika <alex.mazheika@…>		"

{{{

Hi

My name is Alex Mazheika. I use mpich2 for quantum chemical calculations
under Linux (I compiled the program package Espresso (
www.quantum-espresso.org) with mpich2 and apply it for parallel processes
calculations). I noticed a strange phenomenon. The CPU of my PC is Intel
Core Quad (64-bit). When I make my calculations under 64-bit linux-system
(openSUSE 11.0, Fedora 10, Mandriva) it lasts longer than under 32-bit one
(openSUSE-11.0). In both cases I compiled mpich2-1.1 (or earlier versions)
from source-files with gcc, gfortran. The specifying
> mpiexec -arch x86_64 ...
doesn't change anything. Is it OK? Or should I change any options during
compiling of mpich2 or of my Espresso-package? Or, maby, it needs to specify
anything in command console by starting of mpiexec?

thank you in advance

regards,
Alex Mazheika, Research institut for Physical Chemical Problems of BSU,
Leningradskayastr. 14, 220050 Minsk, Belarus
}}}"	bug	closed	minor		mpich2	worksforme