GeantChecklist
Introduction
So much of the understanding of the performance of mu2e depends on simulation studies that a change in geant version could have far-reaching effects. This page contains a checklist for tests to perform before moving to a new geant. Typically, some tests would be skipped because the expert decides the effort to validate would not be justified for the low level of risk.
Note on MT build
4/4/18
- The geant MT branch code can be compiled against (and run using) a sequential version of G4 without the '-DG4MULTITHREADED' flag in the SConscript file.
- The MT branch code code can be compiled against an MT version of G4 with the addition of the '-DG4MULTITHREADED' flag in the SConscript file.
- MT version can be run in 3 modes: (1) in sequential mode, (2) in MT mode using a single thread in which there is a master thread that controls a single worker thread, and (3) in MT mode.
v4_10_4
Started Mar 1, 2018, proposed update to v4_10_4 from v4_10_2_p03e. 3/21/18 - effort paused - now working on v4_10_4 EMZ. On 4/4/18, the decision was taken to restart this effort and delay EMZ, which is more complicated.
To make a release with this change, edit setup.sh and change this line
setup -B geant4 v4_10_2_p03e -q${MU2E_UPS_QUALIFIERS}${MU2E_G4_GRAPHICS_QUALIFIER}
to
setup -B geant4 v4_10_4 -qcl23:${MU2E_UPS_QUALIFIERS}${MU2E_G4_GRAPHICS_QUALIFIER}
How to change the stepper to the new one requiring fewer field evaluations. This is off by default and is not part of this checklist.
physics.producers.g4run.physics.stepper : "G4DormandPrince745"
clhep 2.4.0.0 (not used in this checklist evaluation) will enable the switch from HepJamesRandom to MixMax random number engine (art sets the default)
Results from tests, 1M conversion electrons, 300K beam stage1
| Sample | CPU (s) | MEM (GB) | file size (MB) |
| old beam | 9351 | 1.611 | 6.290 |
| new beam | 8483 (-9%) | 1.715 (+6%) | 6.397(+2%) |
| old CE | 6795 | 1.742 | 918.396 |
| new CE | 6180 (-9%) | 1.804 (+4%) | 909.979(-1%) |
beam comparison
C.E. comparison
stopped muons
| Sign off | Responsible | Topic | Notes |
| 3/14/18 | Krzysztof | release notes presented | available |
| 3/14/18 | Krzysztof | supporting code (new lists, options) | changes enabling new features done in February and March |
| 3/14/18 | Ray | high-stats conversion electrons comparison | see links above and talk |
| 3/14/18 | Ray | high-stats beam stage 1 comparison | see links above and talk |
| 3/14/18 | Ray/Krzysztof | CPU time and product sizes | see above and talk |
| 3/14/18 | Ray/Andrei | stopped muon rates and shape | see links above and talk |
| 4/5/18 | Rob | magnetic field transport | the checks done so far are adequate |
| 4/16/18 | Dave (LBL) | tracker charge deposition/hit resolution | roughly 10% more tracker hits than in v4_10_2 |
| 4/16/18 | Dave (LBL) | tracker background hit rates | |
| 4/16/18 | Dave (LBL) | tracker integrated charge | |
| 4/16/18 | Dave (LBL) | tracker electronics radiation | A full radiation dose test takes weeks to perform. I validated that the tracker photon interactions are reasonable |
| 4/16/18 | Bertrand | calorimeter resolution | (email) I just looked at the various plots produced for v4_10_4, and they all look fine for the calorimeter. |
| 4/16/18 | Bertrand | calorimeter electronics radiation | |
| Ralf | CRV light model | ||
| Yuri | neutron production rates and transport | ||
| Yuri | CRV deadtime | ||
| 4/16/18 | Dave (LBL) | conversion electron efficiency | Efficiency and quality are slightly degraded |
| 4/14/18 | Jim/Yaqian | STM efficiency | lead flourescence and brem bkg checked |
| 4/14/18 | Jim/Yaqian | STM background | lead flourescence and brem bkg checked |
| 4/10/18 | Andrei | ExtMon efficiency | Skip this time (the baseline has not been checked in years). This is feasible to do in the future. |
| 4/10/18 | Andrei | ExtMon background | Skip. A complete study would require very large amount of CPU and effort. Unlikely to be feasible for GEANT upgrade checks. A simpler proxy like e.g. neutron flux in the ExtMon room might be feasible. |
| Ralf | cosmic background | ||
| Bob | p-bar background | ||
| 4/10/18 | Andrei | beam electron background | Skip. May be feasible in the future. |
| 4/19/18 | Dave (Lou) | Pion backgrounds | It would require a dedicated run to do a "real" test. However, if I look at muon stops as a proxy for pion stops, then I see nothing here that makes me panic. |
v4_10_4 EMZ
Started Mar 21, 2018, proposed update to v4_10_4 EMZ from v4_10_2_p03e. At the code/soft meeting on 4/4/18, we decided to delay moving to EMZ since the very different file sizes caused complications with no obvious benefit. This will be considered at a later date, along with regional minRangeCut's.
How to trigger Mu2e specific electromagnetic option4 (_EMZ) with modified msc model transition energy (committed 3/16/18)
physics.producers.g4run.debug.diagLevel : 1 # the above is to see the ranges printed physics.producers.g4run.physics.modifyEMOption4 : true physics.producers.g4run.physics.physicsListName : "ShieldingM_EMZ"
How to change the stepper to the new one requiring fewer field evaluations (off, except where noted):
physics.producers.g4run.physics.stepper : "G4DormandPrince745"
clhep 2.4.0.0 (not used yet) will enable the switch from HepJamesRandom to MixMax random number engine (art sets the default)
Results from tests, 1M conversion electrons, 300K beam stage1
| Sample | CPU (s) | MEM (GB) | file size (MB) |
| old beam | 7325 | 1.76 | 630 |
| new beam | 7896(+8%) | 1.79(+2%) | 718(+13%) |
| old CE | 6844 | 1.75 | 92088 |
| new CE | 7099(+4%) | 1.84(+5%) | 187456(+100%) |
beam stage 1 comparison
CE comparison
stops
Why are conversion electron files so much larger:
arProductsizes:
old:
Size Size/Entry Fraction Data Product Name
505449709 50545.0 0.548 mu2e::SimParticlemv_g4run__ceSimReco.
240938209 24093.8 0.261 mu2e::StepPointMCs_g4run_calorimeter_ceSimReco.
30774582 3077.5 0.033 mu2e::CaloShowerSteps_CaloShowerStepFromStepPt_calorimeter_ceSimReco.
28011825 2801.2 0.030 mu2e::StepPointMCs_g4run_tracker_ceSimReco.
new:
Size Size/Entry Fraction Data Product Name
514208625 51420.9 0.277 mu2e::SimParticlemv_g4run__ceSimReco.
745787106 74578.7 0.402 mu2e::StepPointMCs_g4run_calorimeter_ceSimReco.
236050707 23605.1 0.127 mu2e::CaloShowerSteps_CaloShowerStepFromStepPt_calorimeter_ceSimReco.
181788056 18178.8 0.098 mu2e::StepPointMCs_g4run_tracker_ceSimReco.
| Sign off | Responsible | Topic | Notes |
| 3/21/18 | Krzysztof | release notes presented | talk |
| 3/14/18 | Krzysztof | supporting code (new lists, options) | changes enabling new features done in February and March |
| Ray | high-stats conversion electrons comparison | see links above | |
| Ray | high-stats beam stage 1 comparison | see links above | |
| Ray/Krzysztof | CPU time and product sizes | see above | |
| Ray/Andrei | stopped muon rates and shape | see link above | |
| Rob | magnetic field transport | ||
| Dave (LBL) | tracker charge deposition/hit resolution | talk | |
| Dave (LBL) | tracker background hit rates | ||
| Dave (LBL) | tracker integrated charge | ||
| Dave (LBL) | tracker electronics radiation | ||
| Bertrand | calorimeter resolution | 4/16/18 probably OK | |
| Bertrand | calorimeter electronics radiation | 4/16/18 this needs more study | |
| Ralf | CRV light model | ||
| Yuri | neutron production rates and transport | ||
| Yuri | CRV deadtime | ||
| Dave (LBL) | conversion electron efficiency | ||
| Jim | STM efficiency | ||
| Jim | STM background | ||
| Andrei | ExtMon efficiency | ||
| Andrei | ExtMon background | ||
| Ralf | cosmic background | ||
| Bob | p-bar background | ||
| Andrei | beam electron background | ||
| Dave (Lou) | Pion backgrounds |