mlemanczyk/even-perfect-numbers-scanner
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Switched to heuristic GPU for a better performance than the standard one.

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mlemanczyk committed 2025-10-28 22:15:33 +01:00
1 parent b83bddf49a
commit 0850227881
2 files changed
+18 -9
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PerfectNumbers.Core/MersenneDivisorCycles.cs
+7 -2
View File
@@ -411,7 +411,8 @@ public class MersenneDivisorCycles
// Atomic.Add(ref _tryFactorIntoCountsInternalHits, 1UL); // Atomic.Add(ref _tryFactorIntoCountsInternalHits, 1UL);
// Console.WriteLine($"MersenneDivisorCycles.TryFactorIntoCountsInternal hits {Volatile.Read(ref _tryFactorIntoCountsInternalHits)}"); // Console.WriteLine($"MersenneDivisorCycles.TryFactorIntoCountsInternal hits {Volatile.Read(ref _tryFactorIntoCountsInternalHits)}");
if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None)) HeuristicPrimeTester primeTester = _primeTester ??= new();
if (primeTester.IsPrimeGpu(remaining))
// if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None)) // if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None))
{ {
AddFactor(counts, remaining); AddFactor(counts, remaining);
@@ -916,6 +917,9 @@ public class MersenneDivisorCycles
return CalculateCycleLengthFallback(divisor); return CalculateCycleLengthFallback(divisor);
} }
[ThreadStatic]
private static HeuristicPrimeTester? _primeTester;
internal static bool TryCalculateCycleLengthHeuristic(ulong divisor, in MontgomeryDivisorData divisorData, out ulong cycleLength, bool skipPrimeOrderHeuristic = false) internal static bool TryCalculateCycleLengthHeuristic(ulong divisor, in MontgomeryDivisorData divisorData, out ulong cycleLength, bool skipPrimeOrderHeuristic = false)
{ {
if ((divisor & (divisor - 1UL)) == 0UL) if ((divisor & (divisor - 1UL)) == 0UL)
@@ -936,8 +940,9 @@ public class MersenneDivisorCycles
// Console.WriteLine($"MersenneDivisorCycles.CalculateCycleLengthFallback hits {Volatile.Read(ref _tryCalculateCycleLengthHeuristicHits)}"); // Console.WriteLine($"MersenneDivisorCycles.CalculateCycleLengthFallback hits {Volatile.Read(ref _tryCalculateCycleLengthHeuristicHits)}");
// } // }
HeuristicPrimeTester primeTester = _primeTester ??= new();
// if (!skipPrimeOrderHeuristic && HeuristicPrimeTester.Exclusive.IsPrimeCpu(divisor, CancellationToken.None)) // if (!skipPrimeOrderHeuristic && HeuristicPrimeTester.Exclusive.IsPrimeCpu(divisor, CancellationToken.None))
if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None)) if (!skipPrimeOrderHeuristic && primeTester.IsPrimeGpu(divisor))
// if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None)) // if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None))
{ {
ulong computedOrder = PrimeOrderCalculator.Calculate( ulong computedOrder = PrimeOrderCalculator.Calculate(
PerfectNumbers.Core/PrimeOrderCalculator.Cpu.cs
+11 -7
View File
@@ -1078,6 +1078,8 @@ internal static partial class PrimeOrderCalculator
Stack<ulong>? compositeStack = null; Stack<ulong>? compositeStack = null;
PartialFactorResult result; PartialFactorResult result;
PrimeTester primeTester = PrimeTester.Exclusive; PrimeTester primeTester = PrimeTester.Exclusive;
CancellationToken ct = CancellationToken.None;
HeuristicPrimeTester? tester = _tester ??= new();
if (!gpuFactored) if (!gpuFactored)
{ {
@@ -1150,7 +1152,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Partial factor hits {Volatile.Read(ref _partialFactorHits)}"); // Console.WriteLine($"Partial factor hits {Volatile.Read(ref _partialFactorHits)}");
// bool isPrime = PrimeTester.IsPrimeCpu(composite, CancellationToken.None); // bool isPrime = PrimeTester.IsPrimeCpu(composite, CancellationToken.None);
bool isPrime = PrimeTester.IsPrimeGpu(composite); bool isPrime = tester.IsPrimeGpu(composite);
// bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(composite); // bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(composite);
if (isPrime) if (isPrime)
@@ -1218,7 +1220,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Partial factor pending hits {Volatile.Read(ref _partialFactorPendingHits)}"); // Console.WriteLine($"Partial factor pending hits {Volatile.Read(ref _partialFactorPendingHits)}");
// bool isPrime = PrimeTester.IsPrimeCpu(composite, CancellationToken.None); // bool isPrime = PrimeTester.IsPrimeCpu(composite, CancellationToken.None);
bool isPrime = PrimeTester.IsPrimeGpu(composite); bool isPrime = tester.IsPrimeGpu(composite);
// bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(composite); // bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(composite);
entry = entry.WithPrimality(isPrime); entry = entry.WithPrimality(isPrime);
@@ -1255,7 +1257,7 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _partialFactorCofactorHits, 1UL); // Atomic.Add(ref _partialFactorCofactorHits, 1UL);
// Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}"); // Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}");
cofactorIsPrime = PrimeTester.IsPrimeCpu(cofactor, CancellationToken.None); cofactorIsPrime = tester.IsPrimeGpu(cofactor);
// cofactorIsPrime = PrimeTester.IsPrimeGpu(cofactor); // cofactorIsPrime = PrimeTester.IsPrimeGpu(cofactor);
// cofactorIsPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(cofactor); // cofactorIsPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(cofactor);
} }
@@ -1780,6 +1782,8 @@ internal static partial class PrimeOrderCalculator
// private static ulong _factorCompletelyHits; // private static ulong _factorCompletelyHits;
// private static ulong _factorCompletelyPollardRhoHits; // private static ulong _factorCompletelyPollardRhoHits;
[ThreadStatic]
private static HeuristicPrimeTester? _tester;
private static void FactorCompletely(ulong value, Dictionary<ulong, int> counts, bool knownComposite) private static void FactorCompletely(ulong value, Dictionary<ulong, int> counts, bool knownComposite)
{ {
@@ -1790,10 +1794,10 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _factorCompletelyHits, 1UL); // Atomic.Add(ref _factorCompletelyHits, 1UL);
// Console.WriteLine($"Factor completely hits {Volatile.Read(ref _factorCompletelyHits)}"); // Console.WriteLine($"Factor completely hits {Volatile.Read(ref _factorCompletelyHits)}");
// PrimeTester primeTester = PrimeTester.Exclusive; HeuristicPrimeTester tester = _tester ??= new();
// bool isPrime = primeTester.HeuristicIsPrimeGpu(value); // bool isPrime = primeTester.HeuristicIsPrimeGpu(value);
bool isPrime = PrimeTester.IsPrimeCpu(value, CancellationToken.None); bool isPrime = tester.IsPrimeGpu(value);
// bool isPrime = PrimeTester.IsPrimeGpu(value); // bool isPrime = PrimeTester.IsPrimeGpu(value);
// bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(value); // bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(value);
if (!knownComposite && isPrime) if (!knownComposite && isPrime)
@@ -1809,7 +1813,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Factor completely after PollardRho hits {Volatile.Read(ref _factorCompletelyPollardRhoHits)}"); // Console.WriteLine($"Factor completely after PollardRho hits {Volatile.Read(ref _factorCompletelyPollardRhoHits)}");
// isPrime = primeTester.HeuristicIsPrimeGpu(factor); // isPrime = primeTester.HeuristicIsPrimeGpu(factor);
isPrime = PrimeTester.IsPrimeCpu(factor, CancellationToken.None); isPrime = tester.IsPrimeGpu(factor);
// isPrime = PrimeTester.IsPrimeGpu(factor); // isPrime = PrimeTester.IsPrimeGpu(factor);
// isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(factor); // isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(factor);
if (isPrime) if (isPrime)
@@ -1846,7 +1850,7 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _partialFactorCofactorHits, 1UL); // Atomic.Add(ref _partialFactorCofactorHits, 1UL);
// Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}"); // Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}");
isPrime = PrimeTester.IsPrimeCpu(quotient, CancellationToken.None); isPrime = tester.IsPrimeGpu(quotient);
// isPrime = PrimeTester.IsPrimeGpu(quotient); // isPrime = PrimeTester.IsPrimeGpu(quotient);
// isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(quotient); // isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(quotient);
} }