Newsgroups: comp.parallel.pvm
From: am4a012@math.uni-hamburg.de (Thomas Schroeder)
Subject: BLAS for PVM
Summary: PIM offers not BLAS-like routines for PVM
Keywords: PIM PVM BLAS BLACS
Organization: University of Hamburg, Germany
Date: 22 Aug 1994 11:55:23 GMT
Message-ID: <33a3nb$bj6@rzsun02.rrz.uni-hamburg.de>



In article <123@nutmeg.ukc.ac.uk> you wrote:
: >>>>> About "BLAS under PVM", Eamonn said:
: In article <ecahill-100894195544@ec.hdl.ie> ecahill@hdl.ie (Eamonn Cahill) writes:
: Eamonn> Can anyone tell me if there is a public domain parallel BLAS-like
: Eamonn> library implmented on PVM?
: Eamonn>
: Eamonn> Thanks for any help,
: amonn>
: Eamonn> Eamonn Cahill Hitachi Dublin Laboratory, Trinity College, Dublin
: Eamonn> 2,Ireland Ph: +353-1-6798911, Fax: +353-1-6798926, Internet:
: Eamonn> ecahill@hdl.ie

: The PIM library described below may be of use.  It runs on networks of
: workstations using PVM 3.1, p4 1.2, TCGMSG 4.02, on the Intel Paragon using
: the NX library and on the Cray Y-MP2E/233. and was written by Rudnei Dias
: da and Tim Hopkins.

: Get it from /pub/misc/netlib/pib/pim.tar.Z on unix.hensa.ac.uk

: Dave
: ------
: PIM 1.1  
: Parallel Iterative Methods package for Systems of Linear Equations  
: (Fortran 77 version) 
: --------------------------------------------------------------------------------

PIM is not at all like a BLAS-like routine. PIM stands for "Parallel Iterative Methods" and when you read carefully the introduction you find the comment from the authors that the user have to provide routines for: 1. Matrix-vector product  2. Preconditioning step  3. Inner-products and vector-norms (see page 3 of the doc file). So you have to build your own BLAS-routines for PVM. But on page 4 of the doc file of the PIM you can find "... the BLACS project by Dongarra et al which provides routines to perfo
rm distributed operations over matrices using PVM 3.1." The reference is "J.J. Dongarra, R.A. van de Geijn, and R.C. Whaley. A users guide to the BLACS v0.1. Technical report, Computer Science Department, University of Tennessee, 1993."

When someone have made experience with these BLACS it will be fine if he/she will report this here.

Thomas Schrder (tschroeder@GEOMAT.math.uni-hamburg.de)



