65 lines
1.9 KiB
C#
65 lines
1.9 KiB
C#
// -----------------------------------------------------------------------------
|
|
// file="L4.Evict"
|
|
// Project: StgSharp
|
|
// Copyright (c) Nitload.
|
|
// SPDX-License-Identifier: MIT
|
|
// -----------------------------------------------------------------------------
|
|
|
|
namespace Nitload.Common.HighPerformance.Memory
|
|
{
|
|
public partial class L4
|
|
{
|
|
|
|
/// <summary>
|
|
///
|
|
/// </summary>
|
|
/// <param name="count">
|
|
///
|
|
/// </param>
|
|
/// <returns>
|
|
/// Count of lines not evicted
|
|
/// </returns>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private unsafe int Evict(
|
|
int count = 1
|
|
)
|
|
{
|
|
count = (count < 0) ? 0 : count;
|
|
int* pPtr = _predictCount, mPtr = _mapCount;
|
|
|
|
|
|
int remain = count;
|
|
for (int i = 0; i < CacheLineCount; i++)
|
|
{
|
|
if (pPtr[i] > mPtr[i])
|
|
{
|
|
continue;
|
|
}
|
|
remain -= TryEvictAt(i) ? 1 : 0;
|
|
}
|
|
return remain;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private unsafe bool TryEvictAt(
|
|
int index
|
|
)
|
|
{
|
|
CacheLineMetadata* head = &_head[index];
|
|
if (Interlocked.CompareExchange(ref head->RefCount, int.MinValue, 0) == 0)
|
|
{
|
|
// EvictLine(i + index);
|
|
_ = _map.TryRemove(head->Origin, out _);
|
|
IL4Predict predict = CurrentPredict;
|
|
predict.WriteBack(head->Origin, head->CustomizeProfile, new ReadOnlySpan<byte>((byte*)(ulong)(head->PositionMask + _baseAddress), (int)(ulong)head->SizeMask));
|
|
_bufferAllocator.Free(index);
|
|
_mapCount[index] = 0;
|
|
_predictCount[index] = int.MaxValue;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|
|
}
|