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hlsf error is solving

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This commit is contained in:
Youmu Liu
2025-11-28 18:18:08 +08:00
parent a3570bf20a
commit 0c90461d35
8 changed files with 253 additions and 281 deletions
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StgSharp.Common/HighPerformance/Memory/HLSFAllocator.Level.cs
+16 -10
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@@ -59,20 +59,26 @@ namespace StgSharp.HighPerformance.Memory
return int.Min(blockSize, _align);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private int GetLevelFromSize(long size)
{
return GetLevelFromSize((uint)size);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private int GetLevelFromSize(uint size)
{
/*
* Level sizes: [64, 256, 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216]
* Pattern: 64 * 4^level = 2^6 * 2^(2*level) = 2^(6+2*level)
*
* For size S, we need: 2^(6+2*level) >= S
* So: 6+2*level >= log2(S)
* Therefore: level >= (log2(S) - 6) / 2
*
* We use hardware LZCNT instruction via BitOperations.LeadingZeroCount
* log2(S) = 31 - LeadingZeroCount(S) for 32-bit values
*/
* Level sizes: [64, 256, 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216]
* Pattern: 64 * 4^level = 2^6 * 2^(2*level) = 2^(6+2*level)
*
* For size S, we need: 2^(6+2*level) >= S
* So: 6+2*level >= log2(S)
* Therefore: level >= (log2(S) - 6) / 2
*
* We use hardware LZCNT instruction via BitOperations.LeadingZeroCount
* log2(S) = 31 - LeadingZeroCount(S) for 32-bit values
*/
int log2Size = 31 - BitOperations.LeadingZeroCount(size);
// Calculate level: level = max(0, (log2Size - 6) / 2)