Step 6 - 统计模块

Assets/Tests/EditMode/Step6StatsCollectorTests.cs

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+using NUnit.Framework;
+using VMdemo.Core;
+using VMdemo.Simulation;
+
+namespace VMdemo.Tests.EditMode
+{
+    public class Step6StatsCollectorTests
+    {
+        [Test]
+        public void StatsCollector_Reset_ClearsAllCountersAndRates()
+        {
+            var stats = new StatsCollector();
+            stats.RecordAccess(tlbHit: true, pageTableHit: false, pageFault: false, cost: 1);
+            stats.RecordAccess(tlbHit: false, pageTableHit: false, pageFault: true, cost: 104);
+
+            stats.Reset();
+
+            Assert.That(stats.TotalAccess, Is.EqualTo(0));
+            Assert.That(stats.TlbHit, Is.EqualTo(0));
+            Assert.That(stats.PageTableHit, Is.EqualTo(0));
+            Assert.That(stats.PageFault, Is.EqualTo(0));
+            Assert.That(stats.TotalCost, Is.EqualTo(0L));
+            Assert.That(stats.TlbHitRate, Is.EqualTo(0.0));
+            Assert.That(stats.PageTableHitRate, Is.EqualTo(0.0));
+            Assert.That(stats.AvgCost, Is.EqualTo(0.0));
+        }
+
+        [Test]
+        public void StatsCollector_CalculateCost_FollowsMvpCostModel()
+        {
+            var stats = new StatsCollector();
+
+            Assert.That(stats.CalculateCost(tlbHit: true, pageTableHit: false, pageFault: false, pageFaultPenalty: 100), Is.EqualTo(1));
+            Assert.That(stats.CalculateCost(tlbHit: false, pageTableHit: true, pageFault: false, pageFaultPenalty: 100), Is.EqualTo(4));
+            Assert.That(stats.CalculateCost(tlbHit: false, pageTableHit: false, pageFault: true, pageFaultPenalty: 100), Is.EqualTo(104));
+        }
+
+        [Test]
+        public void StatsCollector_RecordAccess_AggregatesCountersRatesAndAverage()
+        {
+            var stats = new StatsCollector();
+
+            stats.RecordAccess(tlbHit: true, pageTableHit: false, pageFault: false, cost: 1);
+            stats.RecordAccess(tlbHit: false, pageTableHit: true, pageFault: false, cost: 4);
+            stats.RecordAccess(tlbHit: false, pageTableHit: false, pageFault: true, cost: 104);
+
+            Assert.That(stats.TotalAccess, Is.EqualTo(3));
+            Assert.That(stats.TlbHit, Is.EqualTo(1));
+            Assert.That(stats.PageTableHit, Is.EqualTo(1));
+            Assert.That(stats.PageFault, Is.EqualTo(1));
+            Assert.That(stats.TotalCost, Is.EqualTo(109L));
+            Assert.That(stats.TlbHitRate, Is.EqualTo(1.0 / 3.0).Within(1e-12));
+            Assert.That(stats.PageTableHitRate, Is.EqualTo(1.0 / 3.0).Within(1e-12));
+            Assert.That(stats.AvgCost, Is.EqualTo(109.0 / 3.0).Within(1e-12));
+        }
+
+        [Test]
+        public void TranslatorEngine_StepOnce_ToFinalize_UpdatesStatsAndCurrentCost()
+        {
+            var engine = CreateEngine(pageFaultPenalty: 120, seed: 31);
+            engine.SetNextVirtualAddress(0x0000_1234UL);
+
+            while (!engine.StepOnce())
+            {
+            }
+
+            Assert.That(engine.State.CurrentRound, Is.EqualTo(1));
+            Assert.That(engine.State.IsPageFault, Is.True);
+            Assert.That(engine.State.CurrentCost, Is.EqualTo(124));
+            Assert.That(engine.Stats.TotalAccess, Is.EqualTo(1));
+            Assert.That(engine.Stats.PageFault, Is.EqualTo(1));
+            Assert.That(engine.Stats.TotalCost, Is.EqualTo(124L));
+            Assert.That(engine.Stats.AvgCost, Is.EqualTo(124.0));
+        }
+
+        [Test]
+        public void TranslatorEngine_RunOneAccess_TracksBatchSummaryWithMixedPaths()
+        {
+            var engine = CreateEngine(pageFaultPenalty: 100, seed: 41);
+            const ulong va = 0x0000_5678UL;
+
+            var first = engine.RunOneAccess(va); // page fault
+            var second = engine.RunOneAccess(va); // tlb hit
+
+            engine.TlbCache.Clear();
+            var third = engine.RunOneAccess(va); // page table hit
+
+            Assert.IsTrue(first.PageFault);
+            Assert.IsTrue(second.TlbHit);
+            Assert.IsTrue(third.PageTableHit);
+
+            Assert.That(engine.Stats.TotalAccess, Is.EqualTo(3));
+            Assert.That(engine.Stats.TlbHit, Is.EqualTo(1));
+            Assert.That(engine.Stats.PageTableHit, Is.EqualTo(1));
+            Assert.That(engine.Stats.PageFault, Is.EqualTo(1));
+            Assert.That(engine.Stats.TotalCost, Is.EqualTo(109L));
+            Assert.That(engine.Stats.TlbHitRate, Is.EqualTo(1.0 / 3.0).Within(1e-12));
+            Assert.That(engine.Stats.PageTableHitRate, Is.EqualTo(1.0 / 3.0).Within(1e-12));
+            Assert.That(engine.Stats.AvgCost, Is.EqualTo(109.0 / 3.0).Within(1e-12));
+        }
+
+        [Test]
+        public void TranslatorEngine_Reset_ClearsStats()
+        {
+            var engine = CreateEngine(pageFaultPenalty: 100, seed: 51);
+            engine.RunOneAccess(0x0000_9ABCUL);
+            Assert.That(engine.Stats.TotalAccess, Is.EqualTo(1));
+
+            engine.Reset();
+
+            Assert.That(engine.Stats.TotalAccess, Is.EqualTo(0));
+            Assert.That(engine.Stats.TlbHit, Is.EqualTo(0));
+            Assert.That(engine.Stats.PageTableHit, Is.EqualTo(0));
+            Assert.That(engine.Stats.PageFault, Is.EqualTo(0));
+            Assert.That(engine.Stats.TotalCost, Is.EqualTo(0L));
+            Assert.That(engine.Stats.AvgCost, Is.EqualTo(0.0));
+            Assert.That(engine.State.CurrentCost, Is.EqualTo(0));
+        }
+
+        private static TranslatorEngine CreateEngine(int pageFaultPenalty, int seed)
+        {
+            var config = new SimulationConfig
+            {
+                vaBits = 32,
+                pageSizeKB = 4,
+                physicalMemoryMB = 1,
+                tlbEntries = 4,
+                accessCount = 20,
+                pageFaultPenalty = pageFaultPenalty
+            };
+
+            return new TranslatorEngine(config, seed);
+        }
+    }
+}

Assets/Tests/EditMode/Step6StatsCollectorTests.cs.meta

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