mlemanczyk/even-perfect-numbers-scanner
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Benchmarks to compare Interlocked with Atomic added. Atomic replaced with Interlocked on CPU path as better performer.

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mlemanczyk committed 2025-12-11 23:45:01 +01:00
1 parent 0ec48f1f0b
commit 43376745f5
3 files changed
+247 -6
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PerfectNumbers.Core/PrimeOrderCalculator.Hybrid.cs
+4 -4
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@@ -377,12 +377,12 @@ internal static partial class PrimeOrderCalculator
{
while (true)
{
if (Atomic.CompareExchange(ref _cpuCount, 0, 1) == 0)
if (Interlocked.CompareExchange(ref _cpuCount, 0, 1) == 0)
{
return true;
}
if (Atomic.CompareExchange(ref _cpuCount, 1, 0) == 1)
if (Interlocked.CompareExchange(ref _cpuCount, 1, 0) == 1)
{
return false;
}
@@ -391,10 +391,10 @@ internal static partial class PrimeOrderCalculator
}
}
int cpuCount = Atomic.Add(ref _cpuCount, 1);
int cpuCount = Interlocked.Increment(ref _cpuCount);
if (cpuCount == PerfectNumberConstants.GpuRatio)
{
Atomic.Add(ref _cpuCount, -PerfectNumberConstants.GpuRatio);
Interlocked.Add(ref _cpuCount, -PerfectNumberConstants.GpuRatio);
}
else if (cpuCount > PerfectNumberConstants.GpuRatio)
{