Da Yu Tou authored 9 months ago and Rosen Matev committed 9 months ago

Changed UT hits veto to happen after forward, fixed bugs with cloned VELO tracks in matching-then-forward.

Da Yu Tou authored 9 months ago and Rosen Matev committed 9 months ago

- Add per-sector dxDy information to UTGeometry; versioning is introduced to maintain backward compatibility.
- Add per-sector dxDy decoding and necessary Gaudi tests to verify decoded UT hits.
- Adapt all tracking algorithms that use UT hits, such as VeloUT tracking, matching with UT, and downstream tracking.
- Introduce new SmartUTHitCache to replace the old UTHitCache in matching with UT and downstream tracking algorithms:
    1. Remove the global cache and use the original UTHits container when it doesn't fit in shared memory.
    2. Use CUDA SIMD intrinsics to read hit information from the shared memory cache, avoiding repeated shared memory access.
    3. Cache UT hit information into 64 bits (8 bytes) as follows:
      *************************************************************
      *    16 bits   *    16 bits   *    16 bits   *    16 bits   *
      *-----------------------------------------------------------*
      *    xAtYEq0   * zAtYEq0 - z0 *      yMid    * dxDy - dxDy0 *
      *              *              *              *    dY type   *
      *************************************************************
      Note: We use 16 bits (half_t) to store (dxDy - dxDy0), with the last
            bit used to store the dY type (type AB or type CD). This
            introduces a +/- 1 error in the (dxDy - dxDy0) result, but
            it should be generally harmless to our tracking results.
- Add a unit test sequence to validate the new UTHitCache performance.

Co-authored-by: dtou <da.yu.tou@cern.ch>
Co-authored-by: Jiahui Zhuo <jiahui.zhuo@cern.ch>

Adrian Casais Vidal authored 9 months ago and Christopher Rob Jones committed 9 months ago

MuonID NN and ElectronIDNN optimisation. Use of constant memory in general for LipschitzNN instances