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Bug #5737

Random number generators

Added by Gianluca Petrillo about 7 years ago. Updated over 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Gianluca Petrillo
Category:
Other
Target version:
x_future_release
Start date:
03/20/2014
Due date:
% Done:

100%

Estimated time:
4.00 h
Occurs In:
Experiment:
-
Co-Assignees:
Duration:

Description

art provides a RandomNumberGenerator service whose state can be read from a file, and module to save that state.
To support reproducibility, all the algorithms using random numbers should use this generator facility.

A few instances of TRandom from ROOT are scattered through the code, which should be replaced; to date:

lardata/Utilities/SeedCreator.h
larreco/Genfit/GFDetPlane.cxx
larreco/Genfit/TGeant3/TGeant3.cxx
larreco/Genfit/TGeant3/TGeant3TGeo.cxx
larreco/Genfit/GFKalman.cxx
larreco/Genfit/PointHit.cxx
larana/OpticalDetector/OpMCDigi_module.cc
larana/OpticalDetector/BoDataFrameInput_module.cc
larsim/Simulation/sim.h
larsim/EventGenerator/CRY/CosmicsGen_module.cc
lbnecode/lbne/RawdataDisplay/.svn/text-base/rawEVD10ktFD.C.svn-base
lbnecode/lbne/RawdataDisplay/.svn/text-base/rawEVD35tFD.C.svn-base
lbnecode/lbne/RawdataDisplay/DbigDisplay_FD4apa.C
lbnecode/lbne/RawdataDisplay/rawEVD35tFD.C
lbnecode/lbne/RawdataDisplay/rawEVD10ktFD.C
lbnecode/lbne/RawdataDisplay/DbigDisplay_FD4apa_C.d

All these instances (an any other) should be considered for a replacement.
lardata/RecoObjects/test/PropTest_module.cc uses the ANSI C generator... it should also be considered (it is a test but it could be used as an example).

History

#1 Updated by Erica Snider about 7 years ago

See related ticket #5540

#2 Updated by Lynn Garren about 7 years ago

  • Status changed from New to Assigned
  • Assignee set to Erica Snider

#3 Updated by Erica Snider almost 7 years ago

  • Assignee changed from Erica Snider to Gianluca Petrillo

#4 Updated by Gianluca Petrillo about 6 years ago

  • Category changed from Simulation to Other
  • % Done changed from 0 to 70

Resolution status:
- SeedCreator.h has been removed
- offending part in sim.h has also been removed
- all other instances fixed to use SeedService, except the cases below.

GenFit is a messy code and fixing it requires some dedicated time.
Genie is using its own generator given by nutools's GENIEHelper. A ugly workaround is possible, but the resolution of #7911 will make solution a bit easier.

Fixed code is in branches feature/Issue5737 of repositories lardata, larsim, larana and uboonecode.

#5 Updated by Gianluca Petrillo about 6 years ago

  • % Done changed from 70 to 80

GENIE is now tied to SeedService and to RandomNumberGenerator as much as possible.
Two random engines are used: a TRandom3 in GENIE and another TRandom3 in GENIEHelper.
GENIEHelper initialized both with the same seed.
I have disabled GENIEHelper internal generator and replaced with one from RandomNumberGenerator, via a TRandom wrapper to CLHEP::HepRandomEngine (lardata/Utilities/TRandomCLHEP.h).
I have registered this engine as an external engine in SeedService.
The seeds of both engines, independent, are now managed by SeedService.

I have simplified the changes in UBOpticalADCSim module and algorithms by using the same TRandomCLHEP.

Genfit is the last standing issue.

#6 Updated by Gianluca Petrillo over 4 years ago

  • Status changed from Assigned to Resolved
  • % Done changed from 80 to 100

Given that there are no reports of reproducibility problems, and Genfit is close to a dead branch, I am declaring this done.

#7 Updated by Gianluca Petrillo over 4 years ago

  • Status changed from Resolved to Closed

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