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perf(headless): enforce K4 resource envelope

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Erik 2026-07-27 11:14:50 +02:00
parent bd236ce553
commit 776482da82
6 changed files with 797 additions and 2 deletions
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322
tests/AcDream.Headless.Tests/HeadlessProcessResourceEnvelopeTests.cs Normal file
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@ -0,0 +1,322 @@
using AcDream.Headless.Diagnostics;
using AcDream.Headless.Hosting;
namespace AcDream.Headless.Tests;
public sealed class HeadlessProcessResourceEnvelopeTests
{
[Fact]
public void K4ProfileScalesOnlyPerSessionDimensions()
{
HeadlessProcessResourceCeilings ceilings =
HeadlessProcessResourceCeilings.K4Linux;
Assert.Equal(
288L * HeadlessProcessResourceCeilings.MiB,
ceilings.MaximumPrivateBytes(1));
Assert.Equal(
352L * HeadlessProcessResourceCeilings.MiB,
ceilings.MaximumPrivateBytes(2));
Assert.Equal(
2144L * HeadlessProcessResourceCeilings.MiB,
ceilings.MaximumPrivateBytes(30));
Assert.Equal(8d, ceilings.MaximumCpuCorePercent(2));
Assert.Equal(92d, ceilings.MaximumCpuCorePercent(30));
Assert.Equal(
160L * HeadlessProcessResourceCeilings.MiB,
ceilings.MaximumManagedHeapBytes(2));
Assert.Equal(48, ceilings.MaximumThreadCount);
Assert.Equal(5, ceilings.MaximumSocketCount(2));
Assert.Equal(61, ceilings.MaximumSocketCount(30));
}
[Fact]
public void FixedBinaryTwoSessionRynthidSamplePasses()
{
var evaluator =
new HeadlessProcessResourceEnvelopeEvaluator();
_ = evaluator.Evaluate(
"running-start",
Process(
privateBytes: 207_966_208L,
workingSetBytes: 190_509_056L),
Managed(71_036_416L),
RunningSessions(2),
Scheduler(2),
RunningContent(2));
HeadlessProcessResourceEnvelopeSnapshot result =
evaluator.Evaluate(
"periodic",
Process(
privateBytes: 313_847_808L,
workingSetBytes: 302_817_280L,
cpuCorePercent: 6.2811d,
sampleIntervalMilliseconds: 30_000d,
threadCount: 17,
handleCount: 115,
descriptorCount: 116,
socketCount: 3),
Managed(122_179_536L),
RunningSessions(2),
Scheduler(
2,
waitCount: 2918L,
turnCount: 3974L,
catchUpCount: 2L,
lateCount: 3974L,
meanLatenessMilliseconds: 3.31d,
maximumLatenessMilliseconds: 302.16d),
RunningContent(2));
Assert.True(result.HasRateSample);
Assert.True(result.WithinCeilings);
Assert.Empty(result.Violations);
Assert.Equal(97.2667d, result.WaitsPerSecond, precision: 4);
Assert.Equal(132.4667d, result.TurnsPerSecond, precision: 4);
Assert.Equal(0.0667d, result.CatchUpsPerSecond, precision: 4);
}
[Fact]
public void EveryResourceAndRuntimeDebtIsNamed()
{
var evaluator =
new HeadlessProcessResourceEnvelopeEvaluator();
_ = evaluator.Evaluate(
"running-start",
Process(1L, 1L),
Managed(1L),
RunningSessions(2),
Scheduler(2),
RunningContent(2));
HeadlessProcessResourceCeilings ceilings =
HeadlessProcessResourceCeilings.K4Linux;
var sessions = new HeadlessSessionUsageSnapshot(
ConfiguredCount: 2,
InWorldCount: 0,
FaultedCount: 1,
PendingReconnectCount: 0,
ConvergedRuntimeCount: 0,
EntityCount: 0,
InventoryObjectCount: 0,
HostLeaseCount: 0);
HeadlessProcessResourceEnvelopeSnapshot result =
evaluator.Evaluate(
"periodic",
Process(
ceilings.MaximumPrivateBytes(2) + 1L,
ceilings.MaximumWorkingSetBytes(2) + 1L,
cpuCorePercent:
ceilings.MaximumCpuCorePercent(2) + 0.01d,
sampleIntervalMilliseconds: 30_000d,
threadCount: ceilings.MaximumThreadCount + 1,
handleCount:
ceilings.MaximumHandleCount(2) + 1,
descriptorCount:
ceilings.MaximumDescriptorCount(2) + 1,
socketCount:
ceilings.MaximumSocketCount(2) + 1),
Managed(
ceilings.MaximumManagedLiveBytes(2) + 1L),
sessions,
Scheduler(
sessionCount: 1,
waitCount: 7501L,
turnCount: 1L,
catchUpCount: 31L,
lateCount: 1L,
meanLatenessMilliseconds: 10.01d,
maximumLatenessMilliseconds: 750.01d,
faultedCount: 1),
new HeadlessProcessContentSnapshot(
0,
IsDisposeRequested: true,
IsDisposed: false,
MappedVirtualBytes: 1L));
Assert.False(result.WithinCeilings);
string[] expected =
[
"private-bytes",
"working-set-bytes",
"managed-live-bytes",
"managed-heap-bytes",
"cpu-core-percent",
"thread-count",
"handle-count",
"descriptor-count",
"socket-count",
"scheduler-waits-per-second",
"scheduler-catchups-per-second",
"scheduler-mean-lateness-milliseconds",
"scheduler-maximum-lateness-milliseconds",
"faulted-session-debt",
"scheduler-session-count",
"runtime-host-lease-debt",
"unaccounted-session-lifecycle",
"shared-content-lease-debt",
];
Assert.Equal(expected, result.Violations);
}
[Fact]
public void DisposedSampleRequiresExactRuntimeAndContentConvergence()
{
var failing =
new HeadlessProcessResourceEnvelopeEvaluator();
HeadlessProcessResourceEnvelopeSnapshot debt =
failing.Evaluate(
"disposed",
Process(1L, 1L),
Managed(1L),
RunningSessions(2),
Scheduler(2),
RunningContent(2));
Assert.False(debt.WithinCeilings);
Assert.Contains("runtime-terminal-debt", debt.Violations);
Assert.Contains(
"shared-content-terminal-debt",
debt.Violations);
var passing =
new HeadlessProcessResourceEnvelopeEvaluator();
HeadlessProcessResourceEnvelopeSnapshot converged =
passing.Evaluate(
"disposed",
Process(1L, 1L),
Managed(1L),
new HeadlessSessionUsageSnapshot(
ConfiguredCount: 2,
InWorldCount: 0,
FaultedCount: 0,
PendingReconnectCount: 0,
ConvergedRuntimeCount: 2,
EntityCount: 0,
InventoryObjectCount: 0,
HostLeaseCount: 0),
Scheduler(2),
new HeadlessProcessContentSnapshot(
0,
IsDisposeRequested: true,
IsDisposed: true,
MappedVirtualBytes: 0L));
Assert.True(converged.WithinCeilings);
Assert.Empty(converged.Violations);
}
[Fact]
public void NonFiniteResourceRatesFailClosed()
{
var evaluator =
new HeadlessProcessResourceEnvelopeEvaluator();
HeadlessProcessResourceEnvelopeSnapshot result =
evaluator.Evaluate(
"periodic",
Process(
1L,
1L,
cpuCorePercent: double.NaN,
sampleIntervalMilliseconds: 30_000d),
Managed(1L),
RunningSessions(1),
Scheduler(1),
RunningContent(1));
Assert.False(result.WithinCeilings);
Assert.Contains("cpu-core-percent", result.Violations);
}
private static HeadlessProcessUsageSnapshot Process(
long privateBytes,
long workingSetBytes,
double cpuCorePercent = 0d,
double sampleIntervalMilliseconds = 0d,
int threadCount = 16,
int handleCount = 113,
int descriptorCount = 112,
int socketCount = 3) =>
new(
WorkingSetBytes: workingSetBytes,
PrivateBytes: privateBytes,
VirtualBytes: 30_000_000_000L,
TotalProcessorTimeTicks: 0L,
SampleIntervalMilliseconds: sampleIntervalMilliseconds,
CpuCorePercent: cpuCorePercent,
CpuMachinePercent: cpuCorePercent / 16d,
ProcessorCount: 16,
ThreadCount: threadCount,
HandleCount: handleCount,
FileDescriptorCount: descriptorCount,
SocketDescriptorCount: socketCount);
private static HeadlessManagedUsageSnapshot Managed(
long liveBytes) =>
new(
LiveBytes: liveBytes,
HeapSizeBytes: liveBytes,
FragmentedBytes: 0L,
CommittedBytes: liveBytes,
TotalAllocatedBytes: liveBytes,
MemoryLoadBytes: liveBytes,
HighMemoryLoadThresholdBytes: long.MaxValue,
PauseTimePercentage: 0d,
Gen0Collections: 0,
Gen1Collections: 0,
Gen2Collections: 0);
private static HeadlessSessionUsageSnapshot RunningSessions(
int sessionCount) =>
new(
ConfiguredCount: sessionCount,
InWorldCount: sessionCount,
FaultedCount: 0,
PendingReconnectCount: 0,
ConvergedRuntimeCount: 0,
EntityCount: sessionCount,
InventoryObjectCount: sessionCount,
HostLeaseCount: sessionCount);
private static HeadlessSchedulerSnapshot Scheduler(
int sessionCount,
long waitCount = 0L,
long turnCount = 0L,
long catchUpCount = 0L,
long lateCount = 0L,
double meanLatenessMilliseconds = 0d,
double maximumLatenessMilliseconds = 0d,
int faultedCount = 0)
{
const long frequency = TimeSpan.TicksPerSecond;
long totalLatenessTicks = checked((long)(
meanLatenessMilliseconds
* TimeSpan.TicksPerMillisecond
* lateCount));
long maximumLatenessTicks = checked((long)(
maximumLatenessMilliseconds
* TimeSpan.TicksPerMillisecond));
return new HeadlessSchedulerSnapshot(
SessionCount: sessionCount,
WaitCount: waitCount,
TurnCount: turnCount,
CatchUpCollapseCount: catchUpCount,
LateDeadlineCount: lateCount,
TotalLatenessTicks: totalLatenessTicks,
MaximumLatenessTicks: maximumLatenessTicks,
TimestampFrequency: frequency,
ActiveSessionCount: sessionCount - faultedCount,
FaultedSessionCount: faultedCount,
NextDeadline: 0L);
}
private static HeadlessProcessContentSnapshot RunningContent(
int sessionCount) =>
new(
LeaseCount: sessionCount,
IsDisposeRequested: false,
IsDisposed: false,
MappedVirtualBytes: 29_908_271_024L);
}

12
tests/AcDream.Headless.Tests/HeadlessProcessSchedulerTests.cs
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@ -345,6 +345,14 @@ public sealed class HeadlessProcessSchedulerTests
"\"configuredCount\":2",
diagnostics.ToString(),
StringComparison.Ordinal);
Assert.Contains(
"\"resourceEnvelope\":",
diagnostics.ToString(),
StringComparison.Ordinal);
Assert.Contains(
"\"profile\":\"k4-linux-30-session\"",
diagnostics.ToString(),
StringComparison.Ordinal);
host.Dispose();
@ -356,6 +364,10 @@ public sealed class HeadlessProcessSchedulerTests
"\"convergedRuntimeCount\":2",
diagnostics.ToString(),
StringComparison.Ordinal);
Assert.Contains(
"\"violations\":",
diagnostics.ToString(),
StringComparison.Ordinal);
}
[Fact]