News from GPU parameters tuning

Single kernel optimization

MergerTrackFit

MergerSectorRefit

MergerCollect

CompressionStep1unattached

4 dimensions optimization (MergerFollowLoopers + CompressionStep0attached)

21 dimensions optimization - SectorTracker step

Clusterizer step

Automated tuning

• Developed script for automated tuning
• Tunes most of the steps
• Tried on a 750kHz pp simulated dataset
• Results are for the sync time of the standalone benchmark
  • Sync mean time default: 1440.69 ms ± 3.94 ms
  • Sync mean time optimised: 1318.73 ms ± 4.97 ms
  • Performance gain 8.47%

Next two weeks

• Absence for CERN School of Computing
• Plan to run some more automated tuning (on more datasets)
• Create collection of parameter dumps