Import Geant4 11.0.0 source tree
This commit is contained in:
Gabriele Cosmo
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------------------------------------------------------------------------------
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This file and NEW_APP_INSTALL describe important information if you are
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planning to create a new parallel Geant4 application, similarly
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to the examples ParN02 and ParN04.
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This package implements event-level parallelism for Geant4
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using the free TOP-C distribution. (TOP-C = Task Oriented Parallel C/C++)
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To parallelize an existing sequential Geant4 application, read NEW_APP_INSTALL.
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The design goals are:
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1. No modification of the Geant4 kernel libraries.
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2. Application sessions should be efficient and reproducible
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(independently of the number of slave processes and the
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order in which they are called by TOP-C)
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3. Setting deterministic random seeds on each slave
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[ This code assumes that each slave will initialize its random state
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based on either the event number or a random seed selected
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on the master.]
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This assumes that you have already installed CLHEP, Geant4, and TOP-C
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TOP-C can be downloaded via its home page:
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http://www.ccs.neu.edu/home/gene/topc.html
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Other qualifications are:
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1. It has only been tested under Linux, although it should be
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portable to any other UNIX supported by Geant4.
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2. Since Geant4 does not currently support a uniform format for
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tracker hits, calorimeter hits, etc., on new applications,
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you may have to write marshalling code for your hits, based
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on the examples in ParN02 and ParN04.
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3. This should support histograms as long as AnalysisManager::Step() is
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is trivial. However, I have not had the opportunity
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for careful testing. Please write to gene@ccs.neu.edu if you
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are including histograms, and especially if you define
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AnalysisManager::Step().
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4. Currently, this distribution does not support:
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trajectory stores, n-tuples, track parallelism,
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interactive input commands (no macrofile)
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I plan to add those features according to demand.
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Probably: a. allowing interactive input
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b. track-level parallelism
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c. other (trajectory store, PostponeOneEvent(), ...)
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Some design assumptions in this ParGeant4 implementation:
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1. A collectionName for a G4HitsCollection uniquely identifies the
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G4HitsCollection within a G4HCofThisEvent.
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@@ -0,0 +1,114 @@
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<HTML lang="en">
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<HEAD> <!-- -*-text-*- -->
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<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<TITLE>ParGeant4 README</TITLE>
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<link rev="made" href="mailto:gene@ccs.neu.edu">
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<META NAME="Description" CONTENT="ParGeant4 is a parallelization
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ofGeant4 using TOP-C/C++ (Task Oriented Parallel C/C++).
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It is free, open source software.">
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<META NAME="Keywords" CONTENT="ParGeant4, Geant4, TOP-C, parallel computing,
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unix open source, free, NoW, Beowulf, SMP, DSM">
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<META NAME="Language" CONTENT="English">
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<meta name="Author" content="Gene Cooperman">
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<meta name="Modified" content="2002-02-25">
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</HEAD>
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<BODY bgcolor="#FFFFFF">
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<H1>ParGeant4 README</H1>
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<center>
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by <a href="http://www.ccs.neu.edu/home/gene/">Gene Cooperman</a>
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(<a href="mailto:gene@ccs.neu.edu">gene@ccs.neu.edu</a>)
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</center>
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There is also a <a href="http://www.ccs.neu.edu/home/gene/pargeant4.html">
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ParGeant4 Home Page</a>, which will be updated more frequently than
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this page.
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<P>
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This distribution implements event-level parallelism for
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<a href="http://cern.ch/geant4">Geant4</a>
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using the free TOP-C distribution.
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(<a href="http://www.ccs.neu.edu/home/gene/topc.html">TOP-C
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= Task Oriented Parallel C/C++</a>)
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<P>
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These are example parallelizations that parallelize examples/novice/N02
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and examples/novice/N04 of the Geant4 distribution.
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The files also contain information on how to write new parallel
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Geant4 applications or parallelize existing sequential Geant4
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applications.
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<P>
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<PRE>
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The design goals are:
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1. No modification of the Geant4 kernel libraries.
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2. Application sessions should be efficient and reproducible
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(independently of the number of slave processes and the
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order in which they are called by TOP-C)
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3. Setting deterministic random seeds on each slave
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[ This code assumes that each slave will initialize its random state
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based on either the event number or a random seed selected
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on the master.]
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This assumes that you have already installed CLHEP, Geant4, and TOP-C
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TOP-C can be downloaded via its home page:
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http://www.ccs.neu.edu/home/gene/topc.html
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Other qualifications are:
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1. `topc-config' is already in your path.
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2. It has only been tested under Linux, although it should be
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portable to any other UNIX supported by Geant4.
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3. Currently, this distribution does not support:
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histograms, trajectory stores, n-tuples, track parallelism,
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interactive input commands (no macrofile)
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I plan to add those features according to demand.
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Probably: a. histograms (I believe histograms work now, but I don't
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have a ready test application. If someone does, could
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you either check yourself if the parallelization works
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for histograms, or tell me, and I'll parallelize it.)
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b. track-level parallelism
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c. allowing interactive input
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d. other
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</PRE>
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<!--
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Some design assumptions of Geant4 used here:
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1. A collectionName for a G4HitsCollection uniquely identifies the
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G4HitsCollection within a G4HCofThisEvent.
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-->
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<P>
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ParGeant4 has been demonstrated to run over the Computational Grid
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using a new TOP-C communication layer, with support for the Grid,
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based on Ampic. See related paper:
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<br>
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G. Cooperman, H. Casanova, J. Hayes and T. Witzel,
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``Using TOP-C and AMPIC to Port Large Parallel Applications
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to the Computational Grid'',
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<em>Proc. of 2nd IEEC/ACM Interantional Symposium
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on Cluster Computing and the Grid (CCGrid)</em>, 2002,
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to appear
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<P>
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(This material is based in part upon work supported by the National Science
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Foundation under Grants No. 9732330 and 9872114. Any opinions, findings, and
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conclusions or recommendations expressed in this material are those of
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the author(s) and do not necessarily reflect the views of the National
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Science Foundation.)
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<P>
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<ADDRESS>
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Gene Cooperman<br>
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College of Computer Science, 215CN<br>
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Northeastern University<br>
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Boston, MA 02115 <br>
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e-mail: gene@ccs.neu.edu<br>
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Phone: (617) 373-8686<br>
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Fax: (617) 373-5121
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</ADDRESS>
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