mlemanczyk/even-perfect-numbers-scanner
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Initial BitContradiction implementation on GPU

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mlemanczyk committed 2026-01-25 16:37:22 +01:00
1 parent e61d166eb1
commit 17763033e1
13 files changed
+1969 -23
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EvenPerfectBitScanner/Program.cs
+24 -9
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@@ -112,18 +112,25 @@ private static ThreadLocal<object>? MersenneTesters;
}
Console.WriteLine("Initializing");
int gpuPrimeThreads = Math.Max(1, _cliArguments.GpuPrimeThreads);
int gpuPrimeThreads = Math.Max(1, _cliArguments.GpuPrimeThreads * PerfectNumberConstants.ThreadsByAccelerator);
int threadCount = Math.Max(1, _cliArguments.ThreadCount);
EnvironmentConfiguration.MinK = _cliArguments.MinK;
EnvironmentConfiguration.GpuBatchSize = Math.Max(1, _cliArguments.ScanBatchSize);
EnvironmentConfiguration.GpuRatio = _cliArguments.GpuRatio;
EnvironmentConfiguration.MersenneDevice = _cliArguments.MersenneDevice;
EnvironmentConfiguration.OrderDevice = _cliArguments.OrderDevice;
ComputationDevice orderDevice = _cliArguments.OrderDevice;
if (_cliArguments.MersenneDevice == ComputationDevice.Gpu &&
_cliArguments.ByDivisorKIncrementMode == ByDivisorKIncrementMode.BitContradiction)
{
orderDevice = ComputationDevice.Gpu;
}
EnvironmentConfiguration.OrderDevice = orderDevice;
EnvironmentConfiguration.UsePow2GroupDivisors = _cliArguments.ByDivisorKIncrementMode == ByDivisorKIncrementMode.Pow2Groups;
EnvironmentConfiguration.ByDivisorSpecialRange = _cliArguments.ByDivisorSpecialRange;
bool useGpu = _cliArguments.OrderDevice == ComputationDevice.Hybrid || _cliArguments.OrderDevice == ComputationDevice.Gpu ||
bool useGpu = orderDevice == ComputationDevice.Hybrid || orderDevice == ComputationDevice.Gpu ||
_cliArguments.MersenneDevice == ComputationDevice.Hybrid || _cliArguments.MersenneDevice == ComputationDevice.Gpu;
EnvironmentConfiguration.RollingAccelerators = useGpu
@@ -132,6 +139,10 @@ private static ThreadLocal<object>? MersenneTesters;
EnvironmentConfiguration.Initialize();
PrimeOrderCalculatorAccelerator.SkipOrderTablesAndKernels = _cliArguments.MersenneDevice == ComputationDevice.Gpu &&
_cliArguments.UseByDivisor &&
_cliArguments.ByDivisorKIncrementMode == ByDivisorKIncrementMode.BitContradiction;
// NttGpuMath.GpuTransformBackend = _cliArguments.NttBackend;
// NttGpuMath.ReductionMode = _cliArguments.ModReductionMode;
_runPrimesOnCpu = _cliArguments.ForcePrimeKernelsOnCpu;
@@ -148,7 +159,16 @@ private static ThreadLocal<object>? MersenneTesters;
if (useGpu)
{
Console.WriteLine("Warming up GPU kernels");
PrimeTester.WarmUpGpuKernels(EnvironmentConfiguration.RollingAccelerators);
if (_cliArguments.UseByDivisor &&
_cliArguments.ByDivisorKIncrementMode == ByDivisorKIncrementMode.BitContradiction &&
_cliArguments.MersenneDevice == ComputationDevice.Gpu)
{
PrimeTester.WarmUpGpuKernelsForBitContradiction(EnvironmentConfiguration.RollingAccelerators);
}
else
{
PrimeTester.WarmUpGpuKernels(EnvironmentConfiguration.RollingAccelerators);
}
}
// PrimeTester.WarmUpGpuKernels(gpuPrimeThreads >> 4);
@@ -328,11 +348,6 @@ private static ThreadLocal<object>? MersenneTesters;
}
else if (useByDivisor)
{
if (mersenneOnGpu)
{
throw new NotSupportedException("--mersenne-device=gpu is not supported for --mersenne=bydivisor on this execution path.");
}
ByDivisorKIncrementMode kIncrementMode = _cliArguments.ByDivisorKIncrementMode;
if (EnvironmentConfiguration.UseCpuOrder)
{