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Copy GC settings from host process #1765

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merged 4 commits into from Aug 4, 2021
Merged

Copy GC settings from host process #1765

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4860212
write a failing test
adamsitnik Aug 4, 2021
f604c5b
fix
adamsitnik Aug 4, 2021
1b3ab36
do it only for settings which we can read from host process
adamsitnik Aug 4, 2021
ce32588
fix the AppConfigGenerator tests
adamsitnik Aug 4, 2021
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24 changes: 13 additions & 11 deletions src/BenchmarkDotNet/Extensions/ProcessExtensions.cs
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Expand Up @@ -124,7 +124,7 @@ internal static void SetEnvironmentVariables(this ProcessStartInfo start, Benchm
// we have to set "COMPlus_GC*" environment variables as documented in
// https://docs.microsoft.com/en-us/dotnet/core/run-time-config/garbage-collector
if (benchmarkCase.Job.Infrastructure.Toolchain is CoreRunToolchain _)
start.SetCoreRunEnvironmentVariables(benchmarkCase);
start.SetCoreRunEnvironmentVariables(benchmarkCase, resolver);

if (!benchmarkCase.Job.HasValue(EnvironmentMode.EnvironmentVariablesCharacteristic))
return;
Expand Down Expand Up @@ -229,19 +229,21 @@ private static int RunProcessAndIgnoreOutput(string fileName, string arguments,
}
}

private static void SetCoreRunEnvironmentVariables(this ProcessStartInfo start, BenchmarkCase benchmarkCase)
private static void SetCoreRunEnvironmentVariables(this ProcessStartInfo start, BenchmarkCase benchmarkCase, IResolver resolver)
{
var gcMode = benchmarkCase.Job.Environment.Gc;
if (!gcMode.HasChanges)
return; // do nothing for the default settings

start.EnvironmentVariables["COMPlus_gcServer"] = gcMode.Server ? "1" : "0";
start.EnvironmentVariables["COMPlus_gcConcurrent"] = gcMode.Concurrent ? "1" : "0";
start.EnvironmentVariables["COMPlus_GCCpuGroup"] = gcMode.CpuGroups ? "1" : "0";
start.EnvironmentVariables["COMPlus_gcAllowVeryLargeObjects"] = gcMode.AllowVeryLargeObjects ? "1" : "0";
start.EnvironmentVariables["COMPlus_GCRetainVM"] = gcMode.RetainVm ? "1" : "0";
start.EnvironmentVariables["COMPlus_GCNoAffinitize"] = gcMode.NoAffinitize ? "1" : "0";

start.EnvironmentVariables["COMPlus_gcServer"] = gcMode.ResolveValue(GcMode.ServerCharacteristic, resolver) ? "1" : "0";
start.EnvironmentVariables["COMPlus_gcConcurrent"] = gcMode.ResolveValue(GcMode.ConcurrentCharacteristic, resolver) ? "1" : "0";

if (gcMode.HasValue(GcMode.CpuGroupsCharacteristic))
start.EnvironmentVariables["COMPlus_GCCpuGroup"] = gcMode.ResolveValue(GcMode.CpuGroupsCharacteristic, resolver) ? "1" : "0";
if (gcMode.HasValue(GcMode.AllowVeryLargeObjectsCharacteristic))
start.EnvironmentVariables["COMPlus_gcAllowVeryLargeObjects"] = gcMode.ResolveValue(GcMode.AllowVeryLargeObjectsCharacteristic, resolver) ? "1" : "0";
if (gcMode.HasValue(GcMode.RetainVmCharacteristic))
start.EnvironmentVariables["COMPlus_GCRetainVM"] = gcMode.ResolveValue(GcMode.RetainVmCharacteristic, resolver) ? "1" : "0";
if (gcMode.HasValue(GcMode.NoAffinitizeCharacteristic))
start.EnvironmentVariables["COMPlus_GCNoAffinitize"] = gcMode.ResolveValue(GcMode.NoAffinitizeCharacteristic, resolver) ? "1" : "0";
if (gcMode.HasValue(GcMode.HeapAffinitizeMaskCharacteristic))
start.EnvironmentVariables["COMPlus_GCHeapAffinitizeMask"] = gcMode.HeapAffinitizeMask.ToString("X");
if (gcMode.HasValue(GcMode.HeapCountCharacteristic))
Expand Down
12 changes: 6 additions & 6 deletions src/BenchmarkDotNet/Toolchains/AppConfigGenerator.cs
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Expand Up @@ -100,15 +100,15 @@ private static void GenerateJitSettings(XmlDocument xmlDocument, XmlNode runtime

private static void GenerateGCSettings(XmlDocument xmlDocument, XmlNode runtimeElement, GcMode gcMode, IResolver resolver)
{
if (!gcMode.HasChanges)
return;

CreateNodeWithAttribute(xmlDocument, runtimeElement, "gcConcurrent", "enabled", gcMode.ResolveValue(GcMode.ConcurrentCharacteristic, resolver).ToLowerCase());
CreateNodeWithAttribute(xmlDocument, runtimeElement, "gcServer", "enabled", gcMode.ResolveValue(GcMode.ServerCharacteristic, resolver).ToLowerCase());
CreateNodeWithAttribute(xmlDocument, runtimeElement, "GCCpuGroup", "enabled", gcMode.ResolveValue(GcMode.CpuGroupsCharacteristic, resolver).ToLowerCase());
CreateNodeWithAttribute(xmlDocument, runtimeElement, "gcAllowVeryLargeObjects", "enabled", gcMode.ResolveValue(GcMode.AllowVeryLargeObjectsCharacteristic, resolver).ToLowerCase());
CreateNodeWithAttribute(xmlDocument, runtimeElement, "GCNoAffinitize", "enabled", gcMode.ResolveValue(GcMode.NoAffinitizeCharacteristic, resolver).ToLowerCase());

if (gcMode.HasValue(GcMode.CpuGroupsCharacteristic))
CreateNodeWithAttribute(xmlDocument, runtimeElement, "GCCpuGroup", "enabled", gcMode.ResolveValue(GcMode.CpuGroupsCharacteristic, resolver).ToLowerCase());
if (gcMode.HasValue(GcMode.AllowVeryLargeObjectsCharacteristic))
CreateNodeWithAttribute(xmlDocument, runtimeElement, "gcAllowVeryLargeObjects", "enabled", gcMode.ResolveValue(GcMode.AllowVeryLargeObjectsCharacteristic, resolver).ToLowerCase());
if (gcMode.HasValue(GcMode.NoAffinitizeCharacteristic))
CreateNodeWithAttribute(xmlDocument, runtimeElement, "GCNoAffinitize", "enabled", gcMode.ResolveValue(GcMode.NoAffinitizeCharacteristic, resolver).ToLowerCase());
if (gcMode.HasValue(GcMode.HeapAffinitizeMaskCharacteristic))
CreateNodeWithAttribute(xmlDocument, runtimeElement, "GCHeapAffinitizeMask", "enabled", gcMode.ResolveValue(GcMode.HeapAffinitizeMaskCharacteristic, resolver).ToString());
if (gcMode.HasValue(GcMode.HeapCountCharacteristic))
Expand Down
17 changes: 8 additions & 9 deletions src/BenchmarkDotNet/Toolchains/CsProj/CsProjGenerator.cs
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Expand Up @@ -83,16 +83,15 @@ protected override void GenerateProject(BuildPartition buildPartition, Artifacts
[PublicAPI]
protected virtual string GetRuntimeSettings(GcMode gcMode, IResolver resolver)
{
if (!gcMode.HasChanges)
return string.Empty;

return new StringBuilder(80)
var builder = new StringBuilder(80)
.AppendLine("<PropertyGroup>")
.AppendLine($"<ServerGarbageCollection>{gcMode.ResolveValue(GcMode.ServerCharacteristic, resolver).ToLowerCase()}</ServerGarbageCollection>")
.AppendLine($"<ConcurrentGarbageCollection>{gcMode.ResolveValue(GcMode.ConcurrentCharacteristic, resolver).ToLowerCase()}</ConcurrentGarbageCollection>")
.AppendLine($"<RetainVMGarbageCollection>{gcMode.ResolveValue(GcMode.RetainVmCharacteristic, resolver).ToLowerCase()}</RetainVMGarbageCollection>")
.AppendLine("</PropertyGroup>")
.ToString();
.AppendLine($"<ServerGarbageCollection>{gcMode.ResolveValue(GcMode.ServerCharacteristic, resolver).ToLowerCase()}</ServerGarbageCollection>")
.AppendLine($"<ConcurrentGarbageCollection>{gcMode.ResolveValue(GcMode.ConcurrentCharacteristic, resolver).ToLowerCase()}</ConcurrentGarbageCollection>");

if (gcMode.HasValue(GcMode.RetainVmCharacteristic))
builder.AppendLine($"<RetainVMGarbageCollection>{gcMode.ResolveValue(GcMode.RetainVmCharacteristic, resolver).ToLowerCase()}</RetainVMGarbageCollection>");

return builder.AppendLine("</PropertyGroup>").ToString();
}

// the host project or one of the .props file that it imports might contain some custom settings that needs to be copied, sth like
Expand Down
1 change: 1 addition & 0 deletions tests/BenchmarkDotNet.IntegrationTests/BenchmarkDotNet.IntegrationTests.csproj
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Expand Up @@ -12,6 +12,7 @@
<DebugType>pdbonly</DebugType>
<DebugSymbols>true</DebugSymbols>
<NoWarn>$(NoWarn);CA2007</NoWarn>
<ServerGarbageCollection>true</ServerGarbageCollection>
</PropertyGroup>
<ItemGroup>
<Content Include="xunit.runner.json">
Expand Down
8 changes: 6 additions & 2 deletions tests/BenchmarkDotNet.IntegrationTests/GcModeTests.cs
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Expand Up @@ -18,10 +18,14 @@ public class GcModeTests : BenchmarkTestExecutor
private IConfig CreateConfig(GcMode gc) => ManualConfig.CreateEmpty().AddJob(new Job(Job.Dry, gc));

[Fact]
public void CanHostGcMode()
public void HostProcessSettingsAreCopiedByDefault()
{
var config = CreateConfig(GcMode.Default);
CanExecute<WorkstationGcOnly>(config);

if (GCSettings.IsServerGC)
CanExecute<ServerModeEnabled>(config);
else
CanExecute<WorkstationGcOnly>(config);
}

[Fact]
Expand Down