[807] | 1 | $Id: NEW_APP_INSTALL,v 1.2 2002/03/09 08:07:55 cooperma Exp $ |
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| 2 | ------------------------------------------------------------------------------ |
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| 3 | These are instructions for parallelizing a new application. Before |
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| 4 | doing so, try out the examples, ParN02 and ParN04, which have |
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| 5 | parallelized examples/novice/N02 and examples/novice/N04. |
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| 6 | These instructions are written relative to ParN02, but also see |
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| 7 | ParN04 for a more extended example of marshaling hits. |
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| 8 | |
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| 9 | TO INSTALL: |
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| 10 | |
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| 11 | 1. Install Geant4, CLHEP, and TOP-C |
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| 12 | To ensure compatibility, use same compiler for all three. |
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| 13 | (Currently, Geant4 recommends GNU g++ version 2.91.66 or 2.95.2 or higher. |
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| 14 | Try `g++ --version' to check.) |
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| 15 | TOP-C: http://www.ccs.neu.edu/home/gene/topc.html |
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| 16 | Geant4: http://cern.ch/geant4/source/source.html |
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| 17 | CLHEP: http://wwwinfo.cern.ch/asd/lhc++/DISTRIBUTION/hep.html |
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| 18 | |
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| 19 | 2. Source in the standard Geant4 and CLHEP environment variables. |
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| 20 | Environment variables are described in the Geant4 Installation Guide from: |
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| 21 | http://cern.ch/geant4/G4UsersDocuments/Overview/html |
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| 22 | |
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| 23 | 3. Use same compiler for TOP-C as recommended for Geant4. (currently GNU |
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| 24 | g++ version 2.91.66 or 2.95.2 or higher are recommended) |
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| 25 | (Try g++ --version to check) |
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| 26 | Make sure that topc-config is in your path. (Try `which topc-config') |
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| 27 | Test that TOP-C is working. (cd to TOP-C install dir and `make test') |
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| 28 | Also test that a standard Geant4 application (such as novice/N02) works. |
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| 29 | |
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| 30 | 4. For clarity, we assume we are parallelizing novice/N02 from the Geant4 |
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| 31 | distribution. The instructions should work for most Geant4 applications. |
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| 32 | First, copy the following files: |
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| 33 | cp ParExample.icc ParGNUmakefile procgroup $G4INSTALL/example/novice/N02/ |
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| 34 | cp Par*.cc $G4INSTALL/example/novice/N02/src/ |
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| 35 | cp Par*.hh $G4INSTALL/example/novice/N02/include/ |
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| 36 | |
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| 37 | 5. Change to the N02 directory: |
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| 38 | cd $G4INSTALL/example/novice/N02/ |
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| 39 | |
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| 40 | 6. Modify GNUmakefile by adding a line at the beginning: |
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| 41 | include ParGNUmakefile |
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| 42 | |
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| 43 | Modify exampleN02.cc by adding a line just before the definition of main(): |
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| 44 | [IMPORTANT: This must be the last include file in exampleN02.cc] |
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| 45 | #include "ParTopC.icc" |
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| 46 | |
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| 47 | 7. Optionally modify include/ParRandomState.hh |
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| 48 | If this is your first installation, I recommend using the provided default. |
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| 49 | This arranges to generate a random seed on the master for |
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| 50 | each event, and copy it to the slave processing that event. |
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| 51 | The seed is a pseudorandom one explicitly depending on the event number. |
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| 52 | This provides both reasonable efficiency and repeatability |
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| 53 | that is independent of the number of slave process and of the |
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| 54 | order in which slaves complete their tasks. |
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| 55 | |
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| 56 | 8. Modify src/ParExN02MarshaledHits.cc according to the comments in that file. |
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| 57 | You will find examples of the required modification both in ParN02 |
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| 58 | and in ParN04/src/ParExN04MarshaledHits.cc. ParN04 illustrates a |
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| 59 | larger variety of marshaled hits, but read those in ParN02 first, |
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| 60 | in order to understand the principles. |
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| 61 | |
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| 62 | The modifications are required to implement marshaling of each type of hit |
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| 63 | (e.g. for N04: ExN04TrackerHit, ExN04MuonHit, ExN04CalorimeterHit) |
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| 64 | |
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| 65 | You will need to modify the functions: |
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| 66 | MarshaledHCofThisEvent::MarshalHitsCollection |
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| 67 | MarshaledHCofThisEvent::UnmarshalSlaveHitsCollection |
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| 68 | in order to add additional cases in the `if ... else if ...' statement. |
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| 69 | You should also remove the existing case of ExN02TrackerHit |
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| 70 | if you are not parallelizing examples/novice/N02. |
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| 71 | |
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| 72 | There are already default template functions for each type of hit, T: |
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| 73 | TMarshaledHitsCollection<T>::UnmarshalHit |
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| 74 | TMarshaledHitsCollection<T>::MarshalHit |
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| 75 | where T is a G4VHit class such as ExN02TrackerHit. |
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| 76 | The default copies the entire class into a single buffer. If your |
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| 77 | hit class includes pointers, and if you use those pointer in your |
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| 78 | analysis (AnalyzeEvent), then you will need to override the default |
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| 79 | with an explicit specialization that marshals the pointers. |
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| 80 | You may also wish to override the default in order to write |
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| 81 | more efficient marshaling code. |
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| 82 | |
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| 83 | 9. The file `procgroup' determines on which machines the remote processes run. |
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| 84 | The makefile automatically copies the local procgroup to the G4BINDIR just |
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| 85 | before each run. |
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| 86 | For testing, you can use the provided file, as is, and it will set |
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| 87 | up two slave processes on the localhost. For production runs, you |
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| 88 | will want to change it. See the file procgroup for comments on |
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| 89 | ways to change it. Note that the default procgroup redirects standard |
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| 90 | output on the slave (within an event) into a file slave00X.out . |
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| 91 | Without this, the output of the slaves and the master would be |
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| 92 | displayed intermixed on the user console. |
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| 93 | |
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| 94 | 10. Before you compile, make sure your Geant4 environment variables point to |
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| 95 | where you want. This is important because your application binary |
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| 96 | must be in a location visible to all the computers running your |
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| 97 | parallel application. But your Geant4 source and libraries may have |
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| 98 | to stay on a different partition, where you have more disk space. |
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| 99 | |
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| 100 | For example, in my case, I was using source from $G4INSTALL, |
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| 101 | but I was building my application binary and libraries elsewhere. |
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| 102 | I had: setenv $4SYSTEM Linux-g++ |
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| 103 | I wanted to build my application libraries in: ~/geant4-cern/lib/Linux-g++ |
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| 104 | So, I did: setenv G4WORKDIR ~/geant4-cern |
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| 105 | I also made sure that ~/geant4-cern/bin/Linux-g++ existed, since the |
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| 106 | default for the application binary was $G4WORKDIR/bin/$G4SYSTEM . |
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| 107 | Because I copied the precompiled Geant4 libraries |
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| 108 | into ~/geant4-cern/lib-geant4/Linux-g++ |
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| 109 | I also needed to tell Geant4 about this non-standard location |
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| 110 | via: setenv G4LIB ~/geant4-cern/lib-geant4 |
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| 111 | For more information, see: |
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| 112 | http://cern.ch/geant4/G4UsersDocuments/UsersGuides/ (cont.) |
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| 113 | InstallationGuide/html/UnixMachines/unixMachines.html |
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| 114 | |
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| 115 | As always, if you are using shared libaries (.so) under Linux, you may |
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| 116 | have to update your LD_LIBRARY_PATH . Since you will be running |
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| 117 | a parallel application, put this in your shell initialization file |
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| 118 | (in my case, in ~.tcshrc), so it will also be availabe for the remote |
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| 119 | processes that are generated. |
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| 120 | I use the original Geant4 libraries (lib-gent4), the application |
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| 121 | libraries (lib), and the CLHEP library. So, I do: |
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| 122 | setenv LD_LIBRARY_PATH \ |
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| 123 | ${LD_LIBRARY_PATH}:$HOME/geant4-cern/geant4.4.0/lib-geant4/Linux-g++ |
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| 124 | setenv LD_LIBRARY_PATH \ |
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| 125 | ${LD_LIBRARY_PATH}:$HOME/geant4-cern/geant4.4.0/lib/Linux-g++ |
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| 126 | setenv LD_LIBRARY_PATH \ |
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| 127 | ${LD_LIBRARY_PATH}:/afs/cern.ch/sw/lhcxx/specific/redhat61/CLHEP/1.7.0.0/lib |
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| 128 | |
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| 129 | |
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| 130 | 11. Modify ParGNUmakefile according to your goals. |
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| 131 | It may be enough to only change: |
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| 132 | MACROFILE (current default: ParN02.in) |
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| 133 | If you have a datafile (e.g.: examples/novice/N04/pythia_main.data) |
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| 134 | then also set DATAFILE. |
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| 135 | The GNUmakefile copies the MACROFILE and DATAFILE to the G4BINDIR. |
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| 136 | If you require other files (e.g.: pythia_event.data for ExN04), then |
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| 137 | copy them to the G4BINDIR manually or modify ParGNUmakefile to do so. |
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| 138 | Then choose your desired makefile target and go. Try one of: |
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| 139 | make compile |
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| 140 | make run |
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| 141 | make run-debug [Runs application inside gdb.] |
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| 142 | make parclean |
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| 143 | |
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| 144 | ============================================================================ |
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| 145 | Further possible customizations: |
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| 146 | |
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| 147 | If you wish to customize your code further, note that ParGNUmakefile |
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| 148 | contains TOP-C parameters. Try other parameters such as: |
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| 149 | --TOPC-verbose=0 |
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| 150 | --TOPC-trace=0 |
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| 151 | --TOPC-slave-timeout=XXX [ units are seconds, default 1800 seconds ] |
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| 152 | --TOPC-num-slaves=XXX |
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| 153 | --TOPC-help |
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| 154 | |
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| 155 | If you wish to make some of these the default, add a line like: |
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| 156 | TOPC_OPT_trace = 0; |
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| 157 | between `main( ... )' and `TOPC_init( ... )' in the main function. |
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| 158 | |
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| 159 | Read the TOP-C manual, available from the home page |
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| 160 | http://www.ccs.neu.edu/home/gene/topc.html |
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| 161 | for further customizations and uses of TOP-C. |
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| 162 | |
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| 163 | Read ParMarshaledObj.hh for the full set of primitive marshaling functions |
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| 164 | that you might want to use in writing MarshalHit() and UnmarshalHit(). |
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