Merge pull request #45877 from AdrianoDee/fix_zero_tracks_alpaka_140

[14_0_X] Alpaka Pixel: Write `nTracks=0` When No Track Stored
cms-sw · Sep 6, 2024 · b1d8deb · b1d8deb
2 parents a7fc774 + d4ceaa8
commit b1d8deb
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/RecoTracker/PixelSeeding/plugins/alpaka/CAHitNtupletGenerator.cc b/RecoTracker/PixelSeeding/plugins/alpaka/CAHitNtupletGenerator.cc
@@ -300,9 +300,12 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE {
     TrackSoA tracks(queue);
 
     // Don't bother if less than 2 this
-    if (hits_d.view().metadata().size() < 2)
+    if (hits_d.view().metadata().size() < 2) {
+      const auto device = alpaka::getDev(queue);
+      auto ntracks_d = cms::alpakatools::make_device_view(device, tracks.view().nTracks());
+      alpaka::memset(queue, ntracks_d, 0);
       return tracks;
-
+    }
     GPUKernels kernels(m_params, hits_d.view().metadata().size(), hits_d.offsetBPIX2(), queue);
 
     kernels.buildDoublets(hits_d.view(), hits_d.offsetBPIX2(), queue);