AllocateMemoryGroup_Finalization_ReturnsToPool test fails on Linux ARM64

[JimBobSquarePants]

Prerequisites

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

ImageSharp version

https://github.com/SixLabors/ImageSharp/commit/8cf49912e6bd359f6001dd39a882466f41c6795c

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. https://github.com/SixLabors/ImageSharp/pull/2341

Images

No response