AllocateMemoryGroup_Finalization_ReturnsToPool test fails on Linux ARM64

[JimBobSquarePants]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of ImageSharp
• I have verified if the problem exist in both DEBUG and RELEASE mode
• I have searched open and closed issues to ensure it has not already been reported

ImageSharp version

8cf4991

Other ImageSharp packages and versions

NA

Environment (Operating system, version and so on)

Ubuntu 2204 ARM64

.NET Framework version

.NET 6 & 7

Description

I think it's got something to do with memory pressure. The tests fail more often on .NET 7 but on random occasions on .NET 6 also.

[xUnit.net 00:00:11.02]     AllocateMemoryGroup_Finalization_ReturnsToPool(length: 1200) [FAIL]
[xUnit.net 00:00:11.41]     AllocateMemoryGroup_Finalization_ReturnsToPool(length: 600) [FAIL]
  Failed AllocateMemoryGroup_Finalization_ReturnsToPool(length: 1200) [2 s]
  Error Message:
   Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.
  Stack Trace:
  
Child exception:
  Xunit.Sdk.EqualException: Assert.Equal() Failure
Expected: 42
Actual:   [245](https://github.com/SixLabors/ImageSharp/actions/runs/4090560426/jobs/7054056163#step:15:246)
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.AllocateGroupAndForget(UniformUnmanagedMemoryPoolMemoryAllocator allocator, Int32 length, Boolean check) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 301
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.<AllocateMemoryGroup_Finalization_ReturnsToPool>g__RunTest|12_0(String lengthStr) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 285
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)

Child process:
  SixLabors.ImageSharp.Tests, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13 SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests Void <AllocateMemoryGroup_Finalization_ReturnsToPool>g__RunTest|12_0(System.String)

Child arguments:
  1200

  Failed AllocateMemoryGroup_Finalization_ReturnsToPool(length: 600) [276 ms]
  Error Message:
   Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.
  Stack Trace:
  
Child exception:
  Xunit.Sdk.EqualException: Assert.Equal() Failure
Expected: 42
Actual:   188
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.AllocateGroupAndForget(UniformUnmanagedMemoryPoolMemoryAllocator allocator, Int32 length, Boolean check) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 301
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.<AllocateMemoryGroup_Finalization_ReturnsToPool>g__RunTest|12_0(String lengthStr) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 285
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)

Child process:
  SixLabors.ImageSharp.Tests, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13 SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests Void <AllocateMemoryGroup_Finalization_ReturnsToPool>g__RunTest|12_0(System.String)

Child arguments:
  600

[xUnit.net 00:00:11.99]     AllocateSingleMemoryOwner_Finalization_ReturnsToPool(length: 600) [FAIL]
  Failed AllocateSingleMemoryOwner_Finalization_ReturnsToPool(length: 600) [245 ms]
  Error Message:
   Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.
  Stack Trace:
  
Child exception:
  Xunit.Sdk.EqualException: Assert.Equal() Failure
Expected: 42
Actual:   182
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.AllocateSingleAndForget(UniformUnmanagedMemoryPoolMemoryAllocator allocator, Int32 length, Boolean check) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 365
   at SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests.<AllocateSingleMemoryOwner_Finalization_ReturnsToPool>g__RunTest|14_0(String lengthStr) in /home/runner/actions-runner/_work/ImageSharp/ImageSharp/tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs:line 347
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)

Child process:
  SixLabors.ImageSharp.Tests, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13 SixLabors.ImageSharp.Tests.Memory.Allocators.UniformUnmanagedPoolMemoryAllocatorTests Void <AllocateSingleMemoryOwner_Finalization_ReturnsToPool>g__RunTest|14_0(System.String)

Child arguments:
  600

This also affects.

• AllocateSingleMemoryOwner_Finalization_ReturnsToPool
• MultiplePoolInstances_TrimPeriodElapsed_AllAreTrimmed.

Steps to Reproduce

Reproducible on CI runs added here. #2341

Images

No response