mlemanczyk/even-perfect-numbers-scanner
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Avoid redundant compaction buffer clearing on GPU

Browse Source
This commit is contained in:
Marek Lemańczyk committed 2025-10-23 01:16:58 +02:00
1 parent dda53581c0
commit f672ff520c
3 files changed
+7 -6
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

PerfectNumbers.Core/Gpu/Kernels/DivisorByDivisorKernels.cs
+4 -2
View File
@@ -232,8 +232,10 @@ internal static class DivisorByDivisorKernels
int lastLaneMask = globalIndex == length - 1 ? 1 : 0;
int countValue = shared[prefixBase + localIndex];
int storedCount = lastLaneMask != 0 ? countValue : 0;
Atomic.Max(ref compactedCount[0], storedCount);
if (lastLaneMask != 0)
{
compactedCount[0] = countValue;
}
}
public static void PublishFirstHitKernel(
PerfectNumbers.Core/Gpu/MersenneNumberDivisorByDivisorGpuTester.cs
-1
View File
@@ -600,7 +600,6 @@ public sealed class MersenneNumberDivisorByDivisorGpuTester : IMersenneNumberDiv
// return 0;
// }
countView.MemSetToZero();
SharedMemoryConfig sharedMemoryConfig = SharedMemoryConfig.RequestDynamic<int>(count * 3);
Index1D gridDim = new Index1D(1);
Index1D groupDim = new Index1D(count);
PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
+3 -3
View File
@@ -73,7 +73,7 @@ public static class MersenneNumberDivisorByDivisorTester
candidateCount = candidateSpan.Length;
}
pool.Return(recordedCandidates, clearArray: true);
pool.Return(recordedCandidates, clearArray: false);
}
if (skippedByPreviousResults > 0)
@@ -211,8 +211,8 @@ public static class MersenneNumberDivisorByDivisorTester
filteredPrimes.Add(prime);
}
pool.Return(allowedMaxBatch, clearArray: true);
pool.Return(primeBatch, clearArray: true);
pool.Return(allowedMaxBatch, clearArray: false);
pool.Return(primeBatch, clearArray: false);
// The filtered list mirrors primesToTest in the CPU flow, so the guard below never triggers after the earlier
// emptiness checks.