Greetings Don:
Donald Shillady wrote:
I am wondering if there is any work on software for true parallism at
the software level on any of the new Quad-Core chips? Unfortunately,
during my career since 1965 I have tried to write my own software and
avoided using canned software and that has served me well in changing
over many different systems so parallel ESSL does me little good and I
would have to recode a lot of things to use the ESSL routines. I am now
ESSL is/was generally only available to IBM customers on AIX machines
(Power class). I am not sure if it (ESSL) is even still current. ESSL
provided parallel matrix routines, as well as parallel FFT and a few
others. If there are specific routines or functions you need in
parallel (because they consume so much time relative to the rest of the
code), please indicate what they are. In most cases, a little extra
coding can help you leverage some of the excellent open source library
development out there.
RGB will likely point you to GSL, though last I looked (several months
ago) GSL is not parallelized (MPI or OpenMP).
retired but still using WATCOM f77 for coding quantum chemistry under
WINDOWS. I have spent many years on UNIX variants whether HP or SGI
Ok. I last used watfor in 1994 or so.
systems and I have installed LINSPIRE on my PC so I could switch to
REDHAT LINUX with little trouble. The question is whether ESSL or
Parallel-ESSL is needed to do true parallel computing on a Quad-core
chip? Basically I would like to know if anyone is working on making a
If I use the substitution ESSL -> parallel library for X, where X = {
matrix, fft, ... }, the answer is no, you can (quite easily) write/run
your own code in parallel on existing systems. You can use canned open
source libraries to run parallel versions of various algorithms.
Quad-core CPU parallel (preferably f77 or f99) under RedHat LINUX? If I
install RedHat LINUX on a Quad-core CPU (thus avoiding a high speed
switch) what would be needed to run parallel f77, a new compiler?
Not really, though I recommend gcc 4.2 and higher, as they include a
functional OpenMP implementation. I hope to be able to point to an
article on this on a web site soon (covering all aspects from getting
the compiler, building and installing it, through using it for simple
parallel programming).
Joe
Don Shillady
Emeritus Professor of Chemistry
Virginia Commonwealth University
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