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
+49 -40
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PerfectNumbers.Core/PrimeOrderCalculator.Cpu.cs
+12 -8
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@@ -1078,6 +1078,8 @@ internal static partial class PrimeOrderCalculator
Stack<ulong>? compositeStack = null;
PartialFactorResult result;
PrimeTester primeTester = PrimeTester.Exclusive;
CancellationToken ct = CancellationToken.None;
HeuristicPrimeTester? tester = _tester ??= new();
if (!gpuFactored)
{
@@ -1150,7 +1152,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Partial factor hits {Volatile.Read(ref _partialFactorHits)}");
// bool isPrime = PrimeTester.IsPrimeCpu(composite, CancellationToken.None);
bool isPrime = PrimeTester.IsPrimeGpu(composite);
bool isPrime = tester.IsPrimeGpu(composite);
// bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(composite);
if (isPrime)
@@ -1218,7 +1220,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Partial factor pending hits {Volatile.Read(ref _partialFactorPendingHits)}");
// 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);
entry = entry.WithPrimality(isPrime);
@@ -1255,7 +1257,7 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _partialFactorCofactorHits, 1UL);
// Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}");
cofactorIsPrime = PrimeTester.IsPrimeCpu(cofactor, CancellationToken.None);
cofactorIsPrime = tester.IsPrimeGpu(cofactor);
// cofactorIsPrime = PrimeTester.IsPrimeGpu(cofactor);
// cofactorIsPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(cofactor);
}
@@ -1777,9 +1779,11 @@ internal static partial class PrimeOrderCalculator
{
FactorCompletely(value, counts, knownComposite: false);
}
// private static ulong _factorCompletelyHits;
// private static ulong _factorCompletelyPollardRhoHits;
[ThreadStatic]
private static HeuristicPrimeTester? _tester;
private static void FactorCompletely(ulong value, Dictionary<ulong, int> counts, bool knownComposite)
{
@@ -1790,10 +1794,10 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _factorCompletelyHits, 1UL);
// Console.WriteLine($"Factor completely hits {Volatile.Read(ref _factorCompletelyHits)}");
// PrimeTester primeTester = PrimeTester.Exclusive;
HeuristicPrimeTester tester = _tester ??= new();
// bool isPrime = primeTester.HeuristicIsPrimeGpu(value);
bool isPrime = PrimeTester.IsPrimeCpu(value, CancellationToken.None);
bool isPrime = tester.IsPrimeGpu(value);
// bool isPrime = PrimeTester.IsPrimeGpu(value);
// bool isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(value);
if (!knownComposite && isPrime)
@@ -1809,7 +1813,7 @@ internal static partial class PrimeOrderCalculator
// Console.WriteLine($"Factor completely after PollardRho hits {Volatile.Read(ref _factorCompletelyPollardRhoHits)}");
// isPrime = primeTester.HeuristicIsPrimeGpu(factor);
isPrime = PrimeTester.IsPrimeCpu(factor, CancellationToken.None);
isPrime = tester.IsPrimeGpu(factor);
// isPrime = PrimeTester.IsPrimeGpu(factor);
// isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(factor);
if (isPrime)
@@ -1846,7 +1850,7 @@ internal static partial class PrimeOrderCalculator
// Atomic.Add(ref _partialFactorCofactorHits, 1UL);
// Console.WriteLine($"Partial factor cofactor hits {Volatile.Read(ref _partialFactorCofactorHits)}");
isPrime = PrimeTester.IsPrimeCpu(quotient, CancellationToken.None);
isPrime = tester.IsPrimeGpu(quotient);
// isPrime = PrimeTester.IsPrimeGpu(quotient);
// isPrime = Open.Numeric.Primes.Prime.Numbers.IsPrime(quotient);
}