GPU TPC: Fix deterministic mode with per-segment tracking

davidrohr · davidrohr · commit 061d1ef532ba · 2025-09-10T19:57:21.000+02:00
diff --git a/GPU/GPUTracking/Merger/GPUTPCGlobalDebugSortKernels.cxx b/GPU/GPUTracking/Merger/GPUTPCGlobalDebugSortKernels.cxx
@@ -141,6 +141,11 @@ GPUdii() void GPUTPCGlobalDebugSortKernels::Thread<GPUTPCGlobalDebugSortKernels:
         merger.MergedTracks()[currIdx] = firstItem;
       }
     }
+    for (int32_t j = 0; j < n; j++) {
+      if (merger.MergedTracks()[j].PrevSegment() >= 0) {
+        merger.MergedTracks()[j].SetPrevSegment(tmp2[merger.MergedTracks()[j].PrevSegment()]);
+      }
+    }
   }
   GPUbarrier();
   for (int32_t i = 0; i < 2 * GPUCA_NSECTORS; i++) {

Original file line number	Diff line number	Diff line change
`@@ -141,6 +141,11 @@ GPUdii() void GPUTPCGlobalDebugSortKernels::Thread<GPUTPCGlobalDebugSortKernels:`
`141`	`141`	`merger.MergedTracks()[currIdx] = firstItem;`
`142`	`142`	`}`
`143`	`143`	`}`
	`144`	`+ for (int32_t j = 0; j < n; j++) {`
	`145`	`+ if (merger.MergedTracks()[j].PrevSegment() >= 0) {`
	`146`	`+ merger.MergedTracks()[j].SetPrevSegment(tmp2[merger.MergedTracks()[j].PrevSegment()]);`
	`147`	`+ }`
	`148`	`+ }`
`144`	`149`	`}`
`145`	`150`	`GPUbarrier();`
`146`	`151`	`for (int32_t i = 0; i < 2 * GPUCA_NSECTORS; i++) {`