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| 4 | <TITLE>ParGeant4 README</TITLE>
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| 5 | <link rev="made" href="mailto:gene@ccs.neu.edu">
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| 6 | <META NAME="Description" CONTENT="ParGeant4 is a parallelization
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| 7 | ofGeant4 using TOP-C/C++ (Task Oriented Parallel C/C++).
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| 8 | It is free, open source software.">
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| 9 | <META NAME="Keywords" CONTENT="ParGeant4, Geant4, TOP-C, parallel computing,
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| 10 | unix open source, free, NoW, Beowulf, SMP, DSM">
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| 11 | <META NAME="Language" CONTENT="English">
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| 12 | <meta name="Author" content="Gene Cooperman">
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| 13 | <meta name="Modified" content="2002-02-25">
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| 14 | </HEAD>
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| 15 | <BODY bgcolor="#FFFFFF">
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| 16 |
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| 17 | <H1>ParGeant4 README</H1>
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| 18 | <center>
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| 19 | by <a href="http://www.ccs.neu.edu/home/gene/">Gene Cooperman</a>
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| 20 | (<a href="mailto:gene@ccs.neu.edu">gene@ccs.neu.edu</a>)
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| 21 | </center>
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| 22 | There is also a <a href="http://www.ccs.neu.edu/home/gene/pargeant4.html">
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| 23 | ParGeant4 Home Page</a>, which will be updated more frequently than
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| 24 | this page.
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| 25 |
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| 26 | <P>
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| 27 | This distribution implements event-level parallelism for
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| 28 | <a href="http://cern.ch/geant4">Geant4</a>
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| 29 | using the free TOP-C distribution.
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| 30 | (<a href="http://www.ccs.neu.edu/home/gene/topc.html">TOP-C
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| 31 | = Task Oriented Parallel C/C++</a>)
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| 32 |
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| 33 | <P>
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| 34 | These are example parallelizations that parallelize examples/novice/N02
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| 35 | and examples/novice/N04 of the Geant4 distribution.
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| 36 | The files also contain information on how to write new parallel
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| 37 | Geant4 applications or parallelize existing sequential Geant4
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| 38 | applications.
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| 39 |
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| 40 | <P>
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| 41 | <PRE>
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| 42 | The design goals are:
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| 43 | 1. No modification of the Geant4 kernel libraries.
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| 44 | 2. Application sessions should be efficient and reproducible
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| 45 | (independently of the number of slave processes and the
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| 46 | order in which they are called by TOP-C)
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| 47 | 3. Setting deterministic random seeds on each slave
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| 48 | [ This code assumes that each slave will initialize its random state
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| 49 | based on either the event number or a random seed selected
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| 50 | on the master.]
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| 51 |
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| 52 | This assumes that you have already installed CLHEP, Geant4, and TOP-C
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| 53 | TOP-C can be downloaded via its home page:
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| 54 | http://www.ccs.neu.edu/home/gene/topc.html
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| 55 |
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| 56 | Other qualifications are:
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| 57 | 1. `topc-config' is already in your path.
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| 58 | 2. It has only been tested under Linux, although it should be
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| 59 | portable to any other UNIX supported by Geant4.
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| 60 | 3. Currently, this distribution does not support:
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| 61 | histograms, trajectory stores, n-tuples, track parallelism,
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| 62 | interactive input commands (no macrofile)
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| 63 | I plan to add those features according to demand.
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| 64 | Probably: a. histograms (I believe histograms work now, but I don't
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| 65 | have a ready test application. If someone does, could
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| 66 | you either check yourself if the parallelization works
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| 67 | for histograms, or tell me, and I'll parallelize it.)
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| 68 | b. track-level parallelism
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| 69 | c. allowing interactive input
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| 70 | d. other
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| 71 | </PRE>
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| 72 | <!--
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| 73 | Some design assumptions of Geant4 used here:
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| 74 | 1. A collectionName for a G4HitsCollection uniquely identifies the
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| 75 | G4HitsCollection within a G4HCofThisEvent.
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| 76 | -->
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| 77 |
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| 78 | <P>
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| 79 | <IMG SRC="http://www.ccs.neu.edu/home/gene/new.gif" ALT="NEW!">
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| 80 | ParGeant4 has now been demonstrated to run over the Computational Grid
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| 81 | using a new TOP-C communication layer, with support for the Grid,
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| 82 | based on Ampic. There is a paper
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| 83 | reporting on this in
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| 84 | <a href="ftp://ftp.ccs.neu.edu/pub/people/gene/pargeant4/geant4-and-grid.ps">
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| 85 | postscript</a>.
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| 86 | <br>
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| 87 | G. Cooperman, H. Casanova, J. Hayes and T. Witzel,
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| 88 | ``Using TOP-C and AMPIC to Port Large Parallel Applications
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| 89 | to the Computational Grid'',
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| 90 | <em>Proc. of 2nd IEEC/ACM Interantional Symposium
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| 91 | on Cluster Computing and the Grid (CCGrid)</em>, 2002,
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| 92 | to appear
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| 93 |
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| 94 |
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| 95 | <P>
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| 96 | (This material is based in part upon work supported by the National Science
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| 97 | Foundation under Grants No. 9732330 and 9872114. Any opinions, findings, and
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| 98 | conclusions or recommendations expressed in this material are those of
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| 99 | the author(s) and do not necessarily reflect the views of the National
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| 100 | Science Foundation.)
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| 101 | <P>
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| 102 | <ADDRESS>
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| 103 | Gene Cooperman<br>
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| 104 | College of Computer Science, 215CN<br>
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| 105 | Northeastern University<br>
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| 106 | Boston, MA 02115 <br>
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| 107 | e-mail: gene@ccs.neu.edu<br>
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| 108 | Phone: (617) 373-8686<br>
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| 109 | Fax: (617) 373-5121
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| 110 | </ADDRESS>
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