Can you send the full output from configure and config.log? See this
page for details of what we need for compile failures:
http://www.open-mpi.org/community/help/
Also note that there is a slightly newer version than what you're
trying -- v1.1.2 (1.1.3 may actually be out shortly, too).
Note that our servers will be offline several hours tomorrow morning
for planned maintence (it's that time of year), so be sure to look on
the web site today or after tomorrow morning.
On Dec 20, 2006, at 12:05 PM, Andrus, Mr. Brian ((Contractor)) wrote:
I am trying to build an OpenMPI rpm for RHEL4U4 using the following:
rpmbuild --rebuild --define configure_options"CC=pgcc CXX=pgCC
F77=pgf77
FC=pgf90 FFLAGS=-fastsse FCFLAGS=-fastsse" ./openmpi-1.1.1-1.src.rpm
It builds the rpm but there are some warnings:
-------------------
configure: WARNING: -fno-strict-aliasing has been added to CFLAGS
configure: WARNING: -finline-functions has been added to CXXFLAGS
configure: WARNING: *** Fortran 77 and Fortran 90 compilers are not
link
compatible
configure: WARNING: *** Disabling MPI Fortran 90/95 bindings
configure: WARNING: Unknown architecture ... proceeding anyway
configure: WARNING: File locks may not work with NFS. See the
Installation and
users manual for instructions on testing and if necessary fixing this
-------------------
And when I try to compile a simple hello world fortran program:
[root@system ~]# mpif90 hello.f
----------------------------------------------------------------------
--
--
Unfortunately, this installation of Open MPI was not compiled with
Fortran 90 support. As such, the mpif90 compiler is non-functional.
----------------------------------------------------------------------
--
--
I have PGI v6.1 compilers installed at /usr/pgi/linux86-64/6.1/
Help??
Brian Andrus
QSS Group, Inc.
Naval Research Laboratory
Monterey, California
Desk: 831-656-4839
-----Original Message-----
From: users-boun...@open-mpi.org [mailto:users-bounces@open-
mpi.org] On
Behalf Of Renato Golin
Sent: Wednesday, December 20, 2006 7:48 AM
To: Open MPI Users
Subject: Re: [OMPI users] Suggestions needed for parallelisation of
sortingalgorithms (quicksort)
On 12/20/06, Harakiri <harakiri...@yahoo.com> wrote:
I will study through the suggested paper, however i actually read a
different paper which suggested using less messages, i would imagine
that for arrays of numbers lets say 100 Millions - the network
messages become the critical factor.
IMHO,
It depends completely on your network topology and technology (ie.
bandwidth and latency). It's very hard to predict a generic behaviour
other than: "more data is worse".
Ethernet is quite good at bandwidth but not at latency so a few big
chunks are better than lots of small chunks but it also depends how
the
network is carrying your packages along the way.
The network is a critical factor only if it's running time is
comparable
or greater than the processing time. Copying 1Mb between nodes is
critical for a nanosecond computation but not if it'll take days.
cheers,
--renato
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