78 lines
2.1 KiB
C#
78 lines
2.1 KiB
C#
using System;
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namespace VMdemo.Simulation
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{
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public class StatsCollector
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{
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public int TotalAccess { get; private set; }
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public int TlbHit { get; private set; }
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public int PageTableHit { get; private set; }
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public int PageFault { get; private set; }
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public long TotalCost { get; private set; }
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public double TlbHitRate => TotalAccess > 0 ? (double)TlbHit / TotalAccess : 0.0;
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public double PageTableHitRate => TotalAccess > 0 ? (double)PageTableHit / TotalAccess : 0.0;
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public double AvgCost => TotalAccess > 0 ? (double)TotalCost / TotalAccess : 0.0;
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public void Reset()
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{
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TotalAccess = 0;
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TlbHit = 0;
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PageTableHit = 0;
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PageFault = 0;
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TotalCost = 0L;
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}
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public int CalculateCost(bool tlbHit, bool pageTableHit, bool pageFault, int pageFaultPenalty)
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{
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if (pageFaultPenalty <= 0)
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{
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throw new ArgumentOutOfRangeException(nameof(pageFaultPenalty), "pageFaultPenalty 必须是正整数。");
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}
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if (tlbHit)
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{
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return 1;
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}
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if (pageFault)
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{
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return 4 + pageFaultPenalty;
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}
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if (pageTableHit)
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{
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return 4;
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}
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throw new InvalidOperationException("访问结果无效：TLB miss 时必须是页表命中或缺页之一。");
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}
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public void RecordAccess(bool tlbHit, bool pageTableHit, bool pageFault, int cost)
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{
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if (cost < 0)
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{
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throw new ArgumentOutOfRangeException(nameof(cost), "cost 不能为负数。");
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}
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TotalAccess++;
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if (tlbHit)
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{
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TlbHit++;
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}
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if (pageTableHit)
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{
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PageTableHit++;
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}
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if (pageFault)
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{
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PageFault++;
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}
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TotalCost += cost;
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}
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}
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}
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