mlemanczyk/even-perfect-numbers-scanner
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Use GpuUInt128 in by-divisor GPU scan

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Marek Lemańczyk committed 2025-10-13 01:35:40 +02:00
1 parent cd47b122a5
commit ea29035c55
2 files changed
+51 -48
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EvenPerfectBitScanner/Program.cs
+14 -18
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@@ -579,9 +579,6 @@ internal static class Program
Console.WriteLine("Initialization...");
// Compose a results file name that encodes configuration (before opening file)
string byDivisorDeltasLabel = mersenneOnGpu
? "gpu"
: (byDivisorDeltasDevice == ByDivisorDeltasDevice.Gpu ? "cpu-gpu" : "cpu");
var builtName = BuildResultsFileName(
useBitTransform,
threadCount,
@@ -591,19 +588,18 @@ internal static class Program
useDivisor,
useByDivisor,
mersenneOnGpu,
useOrder,
useModuloWorkaround,
_useGcdFilter,
NttGpuMath.GpuTransformBackend,
gpuPrimeThreads,
sliceSize,
scanBatchSize,
_orderWarmupLimitOverride ?? 5_000_000UL,
NttGpuMath.ReductionMode,
mersenneOnGpu ? "gpu" : "cpu",
(GpuContextPool.ForceCpu ? "cpu" : "gpu"),
orderOnGpu ? "gpu" : "cpu",
byDivisorDeltasLabel);
useOrder,
useModuloWorkaround,
_useGcdFilter,
NttGpuMath.GpuTransformBackend,
gpuPrimeThreads,
sliceSize,
scanBatchSize,
_orderWarmupLimitOverride ?? 5_000_000UL,
NttGpuMath.ReductionMode,
mersenneOnGpu ? "gpu" : "cpu",
(GpuContextPool.ForceCpu ? "cpu" : "gpu"),
orderOnGpu ? "gpu" : "cpu");
if (!string.IsNullOrEmpty(_resultsPrefix))
{
@@ -1020,7 +1016,7 @@ internal static class Program
Console.WriteLine(" --help, -help, --?, -?, /? show this help message");
}
private static string BuildResultsFileName(bool bitInc, int threads, int block, GpuKernelType kernelType, bool useLucasFlag, bool useDivisorFlag, bool useByDivisorFlag, bool mersenneOnGpu, bool useOrder, bool useModWorkaround, bool useGcd, NttBackend nttBackend, int gpuPrimeThreads, int llSlice, int gpuScanBatch, ulong warmupLimit, ModReductionMode reduction, string mersenneDevice, string primesDevice, string orderDevice, string byDivisorDeltasDevice)
private static string BuildResultsFileName(bool bitInc, int threads, int block, GpuKernelType kernelType, bool useLucasFlag, bool useDivisorFlag, bool useByDivisorFlag, bool mersenneOnGpu, bool useOrder, bool useModWorkaround, bool useGcd, NttBackend nttBackend, int gpuPrimeThreads, int llSlice, int gpuScanBatch, ulong warmupLimit, ModReductionMode reduction, string mersenneDevice, string primesDevice, string orderDevice)
{
string inc = bitInc ? "bit" : "add";
string mers = useDivisorFlag
@@ -1028,7 +1024,7 @@ internal static class Program
: (useLucasFlag
? "lucas"
: (useByDivisorFlag
? $"bydivisor-{byDivisorDeltasDevice}"
? "bydivisor"
: (kernelType == GpuKernelType.Pow2Mod ? "pow2mod" : "incremental")));
string ntt = nttBackend == NttBackend.Staged ? "staged" : "reference";
string red = reduction switch { ModReductionMode.Mont64 => "mont64", ModReductionMode.Barrett128 => "barrett128", ModReductionMode.GpuUInt128 => "uint128", _ => "auto" };