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Set the static TLS reserve for Geant4 in the simulation tasks #2543

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Merged
sawenzel merged 1 commit into from
Nov 11, 2026
Merged

Set the static TLS reserve for Geant4 in the simulation tasks #2543

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6 changes: 6 additions & 0 deletions MC/bin/o2dpg_sim_workflow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -461,6 +461,9 @@ def extractVertexArgs(configKeyValuesStr, finalDiamondDict):

SKIPMODULES = " ".join(["--skipModules"] + args.skipModules) if len(args.skipModules) > 0 else ""
SIMENGINE=args.e
# Geant4 is loaded by dlopen and needs a glibc static TLS reserve. It is set per task, because the global
# environment does not replace a GLIBC_TUNABLES that already exists, as it does truncated in GRID jobs.
GEANT4_TASK_ENV={'GLIBC_TUNABLES': 'glibc.rtld.optional_static_tls=32768'}
BFIELD=args.field
RNDSEED=args.seed # typically the argument should be the jobid, but if we get None the current time is used for the initialisation
random.seed(RNDSEED)
Expand Down Expand Up @@ -787,6 +790,7 @@ def getDPL_global_options(bigshm=False, ccdbbackend=True, runcommand=True):

if not isActive('all'):
BKGtask['cmd'] += ' --readoutDetectors ' + " ".join(activeDetectors)
BKGtask['env'] = dict(GEANT4_TASK_ENV)

workflow['stages'].append(BKGtask)

Expand Down Expand Up @@ -991,6 +995,7 @@ def getDPL_global_options(bigshm=False, ccdbbackend=True, runcommand=True):
+ ' --seed ' + str(TFSEED) + ' -n ' + str(NSIGEVENTS) \
+ ' --detectorList ' + args.detectorList \
+ ' --fromCollContext collisioncontext.root:' + signalprefix
SGNGENtask['env'] = dict(GEANT4_TASK_ENV)
if GENERATOR=="hepmc":
SGNGENtask['cmd'] += "; RC=$?; ${O2DPG_ROOT}/UTILS/UpdateHepMCEventSkip.sh ../HepMCEventSkip.json " + str(tf) + '; [[ ${RC} == 0 ]]'
if sep_event_mode == True:
Expand Down Expand Up @@ -1021,6 +1026,7 @@ def getDPL_global_options(bigshm=False, ccdbbackend=True, runcommand=True):
SGNtask['cmd'] += ' --readoutDetectors ' + " ".join(activeDetectors)

SGNtask['cmd'] += ' --fromCollContext collisioncontext.root'
SGNtask['env'] = dict(GEANT4_TASK_ENV)
workflow['stages'].append(SGNtask)

# some tasks further below still want geometry + grp in fixed names, so we provide it here
Expand Down
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