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Make the non-prompt injection ratio configurable via environment variable #2400

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Make the non-prompt injection ratio configurable via environment variable #2400

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25ad56d
Set the non-prompt injection ratio to 2
donglovo Jul 3, 2026
d5f1c35
Allow input trigger ratio configuration via environment variable
donglovo Jul 6, 2026
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26 changes: 25 additions & 1 deletion MC/config/PWGDQ/external/generator/generator_pythia8_NonPromptSignals_OO_gaptriggered_dq.C
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Original file line number Diff line number Diff line change
Expand Up @@ -19,12 +19,36 @@ class GeneratorPythia8NonPromptInjectedOOGapTriggeredDQ : public o2::eventgen::G
public:

/// constructor
GeneratorPythia8NonPromptInjectedOOGapTriggeredDQ(int inputTriggerRatio = 5) {
GeneratorPythia8NonPromptInjectedOOGapTriggeredDQ(int inputTriggerRatio = 2) {

mGeneratedEvents = 0;
mInverseTriggerRatio = inputTriggerRatio;

// Read INPUT_TRIGGER_RATIO from the shell environment.
// If it is not defined, keep the default constructor value.
const char* envTriggerRatio = gSystem->Getenv("INPUT_TRIGGER_RATIO");

if (envTriggerRatio && envTriggerRatio[0] != '\0') {
const int valueFromEnv = TString(envTriggerRatio).Atoi();

if (valueFromEnv > 0) {
inputTriggerRatio = valueFromEnv;
} else {
printf(
"WARNING: invalid INPUT_TRIGGER_RATIO=%s, using default value %d\n",
envTriggerRatio,
inputTriggerRatio);
}
}

mGeneratedEvents = 0;
mInverseTriggerRatio = inputTriggerRatio;

printf("Input trigger ratio: %d\n", mInverseTriggerRatio);

// define minimum bias event generator
auto seed = (gRandom->TRandom::GetSeed() % 900000000);

TString pathconfigMB = gSystem->ExpandPathName("${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/generator/pythia8_OO_536.cfg");
pythiaMBgen.readFile(pathconfigMB.Data());
pythiaMBgen.readString("Random:setSeed on");
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