GPU: Fix track buffer size for 0 magnetic field

davidrohr · davidrohr · commit 84714d9838b3 · 2025-04-16T22:18:08.000+02:00
diff --git a/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx b/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx
@@ -378,8 +378,8 @@ void GPUTPCGMMerger::SetMaxData(const GPUTrackingInOutPointers& io)
     }
   }
   mNMaxOutputTrackClusters = mRec->MemoryScalers()->NTPCMergedTrackHits(mNClusters);
-  if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.01f * gpu_common_constants::kCLight)) {
-    mNMaxTracks = mRec->MemoryScalers()->getValue(mNTotalSectorTracks, mNTotalSectorTracks);
+  if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.013f * gpu_common_constants::kCLight)) {
+    mNMaxTracks = mRec->MemoryScalers()->getValue(mNTotalSectorTracks, mNTotalSectorTracks); // 0 magnetic field
   } else {
     mNMaxTracks = mRec->MemoryScalers()->NTPCMergedTracks(mNTotalSectorTracks);
   }

Original file line number	Diff line number	Diff line change
`@@ -378,8 +378,8 @@ void GPUTPCGMMerger::SetMaxData(const GPUTrackingInOutPointers& io)`
`378`	`378`	`}`
`379`	`379`	`}`
`380`	`380`	`mNMaxOutputTrackClusters = mRec->MemoryScalers()->NTPCMergedTrackHits(mNClusters);`
`381`		`- if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.01f * gpu_common_constants::kCLight)) {`
`382`		`- mNMaxTracks = mRec->MemoryScalers()->getValue(mNTotalSectorTracks, mNTotalSectorTracks);`
	`381`	`+ if (CAMath::Abs(Param().polynomialField.GetNominalBz()) < (0.013f * gpu_common_constants::kCLight)) {`
	`382`	`+ mNMaxTracks = mRec->MemoryScalers()->getValue(mNTotalSectorTracks, mNTotalSectorTracks); // 0 magnetic field`
`383`	`383`	`} else {`
`384`	`384`	`mNMaxTracks = mRec->MemoryScalers()->NTPCMergedTracks(mNTotalSectorTracks);`
`385`	`385`	`}`