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Improved seed and option files handling #2032

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Merged
jackal1-66 merged 1 commit into from
Jun 16, 2025
Merged

Improved seed and option files handling #2032

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17 changes: 12 additions & 5 deletions MC/config/examples/epos4/generator_EPOS4.C
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Original file line number Diff line number Diff line change
Expand Up @@ -43,19 +43,26 @@ FairGenerator* generateEPOS4(const std::string &name, const int& nEvents)
buffer << line << "\n";
}
file.close();
auto gen = new GeneratorEPOS4();
auto &param0 = o2::eventgen::GeneratorFileOrCmdParam::Instance();
auto &param = o2::eventgen::GeneratorHepMCParam::Instance();
auto &conf = o2::conf::SimConfig::Instance();
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@sawenzel sawenzel Jun 16, 2025

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I guess this is fine for event pool productions. (SimConfig is not initialized within dpl-eventgen / hyperloop, I think).

// Randomise seed (useful for multiple instances of the generator)
int randomSeed = gRandom->Integer(conf.getStartSeed());
// Write the updated content back to a file in the current directory
std::ofstream outFile("cfg.optns");
std::string optnsFileName(Form("cfg%d.optns", randomSeed));
std::ofstream outFile(optnsFileName);
outFile << buffer.str();
if (!found)
{
outFile << "set nfull " + std::to_string(nEvents);
}
outFile.close();
auto gen = new GeneratorEPOS4();
auto& param0 = o2::eventgen::GeneratorFileOrCmdParam::Instance();
auto& param = o2::eventgen::GeneratorHepMCParam::Instance();
auto& conf = o2::conf::SimConfig::Instance();
optnsFileName = optnsFileName.substr(0, optnsFileName.find_last_of('.')); // remove the .optns extension
// setup the HepMC generator to run with automatic FIFOs
gen->setup(param0, param, conf);
// Replace seed and optns file
gen->setCmd(param0.cmd + " -i " + optnsFileName);
gen->setSeed(randomSeed);
return gen;
}
2 changes: 1 addition & 1 deletion MC/config/examples/ini/GeneratorEPOS4.ini
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Expand Up @@ -3,7 +3,7 @@ fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator_EPOS4.C
funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator/example.optns", 2147483647)

[GeneratorFileOrCmd]
cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh -i cfg
cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh
bMaxSwitch=none

# Set to version 2 if EPOS4.0.0 is used
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2 changes: 1 addition & 1 deletion MC/config/examples/ini/GeneratorEPOS4HQ.ini
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Expand Up @@ -4,7 +4,7 @@ fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator_EPOS4.C
funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator/examplehq.optns", 2147483647)

[GeneratorFileOrCmd]
cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh -i cfg
cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh
bMaxSwitch=none

[HepMC]
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