From de15275dc26089ff9bd209b2b52bc64fb95208f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Strehovsk=C3=BD?=
 <MichalStrehovsky@users.noreply.github.com>
Date: Tue, 12 Dec 2023 08:44:09 +0100
Subject: [PATCH 1/2] Use workstation GC in outerloop NativeAOT libs runs

Linux has a habit of overpromising memory and then underdelivering when one wants to actually use it.

Native AOT test legs often get OOM killed. For Pri-0 runs we had success switching to workstation GC that is slower, but uses less memory. Try the same for libs testing.
---
 eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml b/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
index e9d21e31b1b4bb..164485e7d00770 100644
--- a/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
+++ b/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
@@ -66,7 +66,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Libs
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) /p:TestNativeAot=true /p:ArchiveTests=true
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) /p:TestNativeAot=true /p:ArchiveTests=true /p:IlcUseServerGc=false
             timeoutInMinutes: 300 # doesn't normally take this long, but I've seen Helix queues backed up for 160 minutes
             # extra steps, run tests
             postBuildSteps:
@@ -91,7 +91,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:IlcUseServerGc=false
             timeoutInMinutes: 360
             # extra steps, run tests
             postBuildSteps:
@@ -116,7 +116,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs_SizeOpt
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Size
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Size /p:IlcUseServerGc=false
             timeoutInMinutes: 240
             # extra steps, run tests
             postBuildSteps:
@@ -141,7 +141,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs_SpeedOpt
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Speed
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Speed /p:IlcUseServerGc=false
             timeoutInMinutes: 240
             # extra steps, run tests
             postBuildSteps:

From 838c7d0d7681e23d77a519e2d4a7f93dd7bfbc6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Strehovsk=C3=BD?=
 <MichalStrehovsky@users.noreply.github.com>
Date: Tue, 12 Dec 2023 11:12:20 +0100
Subject: [PATCH 2/2] Update tests.proj

---
 src/libraries/tests.proj | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 05605d51f70069..8ae6fb506a012c 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -429,6 +429,10 @@
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.IO.Ports\tests\System.IO.Ports.Tests.csproj"
                       Condition="'$(TargetOS)' != 'windows'" />
 
+    <!-- Getting OOM killed, needs investigation why it uses 10 GB of memory -->
+    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Tests\System.Text.Json.SourceGeneration.Roslyn4.4.Tests.csproj"
+                      Condition="'$(TargetOS)' == 'linux'" />
+
     <!-- Not applicable to NativeAOT -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.HostFactoryResolver\tests\Microsoft.Extensions.HostFactoryResolver.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Runtime.Loader\tests\DefaultContext\System.Runtime.Loader.DefaultContext.Tests.csproj" />