hpc:pythia

Table of Contents

Building Pythia on BlueGene/Q
Pythia Performance
- On ''acinode.hep.anl.gov''

Building Pythia on BlueGene/Q

Part 1: Build HepMC Library

Check out HepMC from SVN:

svn co svn+ssh://username@atlas1.hep.anl.gov/users/svn/hpc/tools/HepMC-2.06.08 <destination_path>

Inside the HepMC folder run
```
./bgq-make.sh
```

Part 2: Build Pythia Library

Check out Pythia from SVN:

svn co svn+ssh://username@atlas1.hep.anl.gov/users/svn/hpc/generators/pythia/v8180/bgq/trunk <destination_path>

Inside the Pythia folder run
```
./bgq-make.sh
```

Part 3: Build Pythia Executable

Check out TCLAP from SVN:

svn co svn+ssh://username@atlas1.hep.anl.gov/users/svn/hpc/tools/tclap-1.2.1 <destination_path>

Check out Pythia user code from SVN:

svn co svn+ssh://username@atlas1.hep.anl.gov/users/svn/hpc/generators/pythia/usercode <destination_path>

Inside the usercode folder you will find different programs written to use Pythia. As of this writting there was only one:
- alpToHepmc/runPythiaOnAlpgen.cpp which can be used to shower Alpgen events and output HepMC format
  - There is a Makefile which can be used to make an executable, be sure to edit the paths inside the Makefile to point to the HepMC/Pythia/TCLAP installations

Pythia Performance

On ''acinode.hep.anl.gov''

This is the Pythia performance on ascinode.hep.anl.gov while hadronizing Alpgen Z+N-jet events.

'N Showered Events' are the number of events Pythia showered during the test.
'CPU Time' are the seconds reported by the 'time' command line that it took Pythia to run.
'Rate' = 'N Showered Events'/'CPU Time'
'Accepted Events' are the number of events that passed the Jet Matching that Pythia performs in order to avoid double counting.
'Acceptance Efficieny' = 'Accepted Events'/'N Showered Events'
'Accepted Rate' = 'Accepted Events'/'CPU Time'

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