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This commit is contained in:
Youmu Liu
2026-03-26 18:02:13 +08:00
parent d960d02972
commit 06e3aa119b
20 changed files with 198 additions and 169 deletions
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StgSharpDebug/TestL4Prefetch.cs
+8 -8
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@@ -40,7 +40,7 @@ namespace StgSharp
// 用于 P2-2 验证"预填充后 Map 命中不触发二次 Prefetch"。
// ====================================================================
internal sealed class CountingPredictor : IPrefetchPredict
internal sealed class CountingPredictor : IL4Predict
{
private readonly nuint[] _addresses;
@@ -158,7 +158,7 @@ namespace StgSharp
L4.DebugSnapshot snap = l4.GetDebugSnapshot();
Console.WriteLine();
Console.WriteLine(
$" [diag] after warm-up: MaxId={snap.MaxId}, " + $"AheadCount={snap.AheadCount}, " + $"Predict×{predictAfterWarmup}, " + $"Prefetch×{prefetchAfterWarmup}");
$"{$" [diag] after warm-up: MaxId={snap.MaxId}, "}{$"AheadCount={snap.AheadCount}, "}{$"Predict×{predictAfterWarmup}, "}{$"Prefetch×{prefetchAfterWarmup}"}");
}
// 断言 c（warm-up 后）：所有 K 条地址均在缓存中
@@ -195,7 +195,7 @@ namespace StgSharp
{
L4.DebugSnapshot snap = l4.GetDebugSnapshot();
Console.WriteLine(
$" [diag] after {K}x Map: AheadCount={snap.AheadCount}, " + $"Predict×{predictAfterMaps}, " + $"Prefetch×{prefetchAfterMaps}");
$"{$" [diag] after {K}x Map: AheadCount={snap.AheadCount}, "}{$"Predict×{predictAfterMaps}, "}{$"Prefetch×{prefetchAfterMaps}"}");
}
// 断言 b: 已缓存的行不会被重新装填（Prefetch(line) 调用次数不增加）
@@ -204,15 +204,15 @@ namespace StgSharp
// 这是预期行为，不断言 Predict 次数。
L4Assert(
prefetchAfterMaps == prefetchAfterWarmup,
$"Prefetch(line) should not be called again for already-cached addresses, " + $"was {prefetchAfterWarmup} after warm-up, now {prefetchAfterMaps}");
$"{$"Prefetch(line) should not be called again for already-cached addresses, "}{$"was {prefetchAfterWarmup} after warm-up, now {prefetchAfterMaps}"}");
// Predict 增加是正常的，仅打印供参考
Console.WriteLine(
$" [info] Predict called {predictAfterMaps - predictAfterWarmup} " + $"extra time(s) during {K}x Map " + $"(aheadCount stays below threshold=1024 " + $"because K={K} << 1024, re-prediction is expected)");
$"{$" [info] Predict called {predictAfterMaps - predictAfterWarmup} "}{$"extra time(s) during {K}x Map "}{$"(aheadCount stays below threshold=1024 "}{$"because K={K} << 1024, re-prediction is expected)"}");
if (_l4FailCount == 0) {
Console.WriteLine(
$"PASS (K={K}, all hits, no re-prefetch, " + $"Prefetch×{prefetchAfterMaps})");
$"{$"PASS (K={K}, all hits, no re-prefetch, "}{$"Prefetch×{prefetchAfterMaps})"}");
}
}
catch (Exception ex)
@@ -284,7 +284,7 @@ namespace StgSharp
// 此处仅记录行为，不判定 FAIL——但打印出来供后续决策参考。
Console.WriteLine(
evictThrew ?
"PASS (DebugEvict with null Predictor threw NullRef as expected " + "— caller is responsible for null check per trusted-call model)" :
("PASS (DebugEvict with null Predictor threw NullRef as expected " + "— caller is responsible for null check per trusted-call model)") :
"PASS (DebugEvict with null Predictor did not throw)");
// 核心断言：Prefetch() 本身在 null Predictor 时不崩溃
@@ -300,7 +300,7 @@ namespace StgSharp
L4.DebugSnapshot snap = l4b.GetDebugSnapshot();
Console.WriteLine(
$" [info] AheadCount after warm-up = {snap.AheadCount} " + $"(Prefetch triggers when < 1024)");
$"{$" [info] AheadCount after warm-up = {snap.AheadCount} "}{$"(Prefetch triggers when < 1024)"}");
// Prefetch 的 null 检查测试：直接调用 DebugPrefetch（如已暴露）
// 当前 Debug 接口未暴露 DebugPrefetch，改为间接验证：