mlemanczyk/even-perfect-numbers-scanner
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Various optimizations to separate non-static data between threads and resolve read/write access issue.

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mlemanczyk committed 2025-11-04 20:45:56 +01:00
1 parent 5a17fa64d5
commit 64d615c402
26 files changed
+1181 -1117
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PerfectNumbers.Core/DivisorCycleCache.cs
+11 -10
View File
@@ -226,9 +226,10 @@ public sealed class DivisorCycleCache
private void ComputeCyclesGpuCore(ReadOnlySpan<ulong> divisors, Span<ulong> destination)
{
int length = divisors.Length;
var gpuLease = GpuKernelPool.GetKernel(useGpuOrder: true);
var gpuLease = GpuKernelPool.GetKernel();
Accelerator accelerator = gpuLease.Accelerator;
Accelerator accelerator = gpuLease.Accelerator;
var stream = gpuLease.Stream;
var kernel = _gpuKernelCache.GetOrAdd(accelerator, LoadKernel);
using MemoryBuffer1D<ulong, Stride1D.Dense> divisorBuffer = accelerator.Allocate1D<ulong>(length);
@@ -258,7 +259,7 @@ public sealed class DivisorCycleCache
: new Span<byte>(rentedStatus = ArrayPool<byte>.Shared.Rent(length), 0, length);
ref ulong divisorRef = ref MemoryMarshal.GetReference(divisors);
divisorBuffer.View.CopyFromCPU(ref divisorRef, length);
divisorBuffer.View.CopyFromCPU(stream, ref divisorRef, length);
for (int i = 0; i < length; i++)
{
@@ -275,18 +276,18 @@ public sealed class DivisorCycleCache
statusSpan[i] = ByteZero;
}
powBuffer.View.CopyFromCPU(ref MemoryMarshal.GetReference(powSpan), length);
orderBuffer.View.CopyFromCPU(ref MemoryMarshal.GetReference(orderSpan), length);
resultBuffer.View.CopyFromCPU(ref MemoryMarshal.GetReference(resultSpan), length);
statusBuffer.View.CopyFromCPU(ref MemoryMarshal.GetReference(statusSpan), length);
powBuffer.View.CopyFromCPU(stream, ref MemoryMarshal.GetReference(powSpan), length);
orderBuffer.View.CopyFromCPU(stream, ref MemoryMarshal.GetReference(orderSpan), length);
resultBuffer.View.CopyFromCPU(stream, ref MemoryMarshal.GetReference(resultSpan), length);
statusBuffer.View.CopyFromCPU(stream, ref MemoryMarshal.GetReference(statusSpan), length);
int pending;
do
{
kernel(length, _divisorCyclesBatchSize, divisorBuffer.View, powBuffer.View, orderBuffer.View, resultBuffer.View, statusBuffer.View);
accelerator.Synchronize();
stream.Synchronize();
statusBuffer.View.CopyToCPU(ref MemoryMarshal.GetReference(statusSpan), length);
statusBuffer.View.CopyToCPU(stream, ref MemoryMarshal.GetReference(statusSpan), length);
pending = 0;
for (int i = 0; i < length; i++)
{
@@ -298,7 +299,7 @@ public sealed class DivisorCycleCache
}
while (pending > 0);
resultBuffer.View.CopyToCPU(ref MemoryMarshal.GetReference(resultSpan), length);
resultBuffer.View.CopyToCPU(stream, ref MemoryMarshal.GetReference(resultSpan), length);
resultSpan.CopyTo(destination);
if (rentedPow is not null)
{