l4 switch to RRPV eviction

2026-03-11 09:00:51 +08:00
parent 3f2b1fcd97
commit c842f72934
6 changed files with 858 additions and 395 deletions
@@ -0,0 +1,79 @@
+//-----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+// file="L4.Prefetch"
+// Project: StgSharp
+// AuthorGroup: Nitload
+// Copyright (c) Nitload. All rights reserved.
+//     
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//     
+// -----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.HighPerformance.Memory
+{
+    public unsafe partial class L4
+    {
+
+        private partial void Prefetch()
+        {
+            if (PrefetchPredict is null) {
+                return;
+            }
+            Span<CacheLinePrediction> span = new(_prediction, PredictionCount);
+            int actualCount = PrefetchPredict.Predict(span);
+            int missIndex = 0;
+            for (int i = 0; i < actualCount; i++)
+            {
+                ref CacheLinePrediction handle = ref span[i];
+                nuint address = handle.Address;
+                if (!TestHit(address))
+                {
+                    // miss and record
+                    span[missIndex] = handle;
+                    missIndex++;
+                }
+            }
+
+            // now prefetch the misses
+            for (int i = 0; i < missIndex; i++)
+            {
+                ref CacheLinePrediction handle = ref span[i];
+                nuint address = handle.Address;
+
+                // pre fetch them here
+            }
+        }
+
+        private partial bool TestHit(
+                             nuint origin
+        )
+        {
+            // needs implementation
+            return false;
+        }
+
+    }
+}