System.IO.FileSystem.Net5Compat.Tests failed on Android due to lowmemorykiller

[danmoseley]

net6.0-Android-Release-x86-Mono_Release-Ubuntu.1804.Amd64.Android.Open

65 E lowmemorykiller: Kill 'net.dot.System.IO.FileSystem.Net5Compat.Tests' (7383), uid 10115, oom_adj 0 to free 2107432kB

Logs can be gotten from Work Item System.IO.FileSystem.Net5Compat.Tests in job 1db68265-e405-4d05-9dd7-cb05a69b84ff

in particular https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-46417-merge-1db68265e4054d059d/System.IO.FileSystem.Net5Compat.Tests/adb-logcat-net.dot.System.IO.FileSystem.Net5Compat.Tests-net.dot.MonoRunner.log?sv=2019-07-07&se=2021-08-03T20%3A09%3A04Z&sr=c&sp=rl&sig=NYCkCCBJSiwncQMds3ExUXcQiYOEFx3Ki%2BjTO5vv65I%3D

hit in #46417

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Issue Details

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net6.0-Android-Release-x86-Mono_Release-Ubuntu.1804.Amd64.Android.Open

65 E lowmemorykiller: Kill 'net.dot.System.IO.FileSystem.Net5Compat.Tests' (7383), uid 10115, oom_adj 0 to free 2107432kB

Logs can be gotten from Work Item System.IO.FileSystem.Net5Compat.Tests in job 1db68265-e405-4d05-9dd7-cb05a69b84ff

in particular https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-46417-merge-1db68265e4054d059d/System.IO.FileSystem.Net5Compat.Tests/adb-logcat-net.dot.System.IO.FileSystem.Net5Compat.Tests-net.dot.MonoRunner.log?sv=2019-07-07&se=2021-08-03T20%3A09%3A04Z&sr=c&sp=rl&sig=NYCkCCBJSiwncQMds3ExUXcQiYOEFx3Ki%2BjTO5vv65I%3D

hit in #46417

Author:	danmoseley
Assignees:	-
Labels:	area-System.IO, os-android
Milestone:	-

[danmoseley]

@steveisok if there are other candidates for terminating perhaps we could use oom_score_adj to protect the test process? It can't make anything worse than terminating the test process?

If the test is simply using too much memory then I guess we need a dump to find out which test is the problem.

[danmoseley]

I was looking at https://android.googlesource.com/kernel/common.git/+/d4fe84dd6eebc11774808f2eb094ed0826fa3c33/drivers/staging/android/lowmemorykiller.c#12

[ghost]

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Issue Details

---

net6.0-Android-Release-x86-Mono_Release-Ubuntu.1804.Amd64.Android.Open

65 E lowmemorykiller: Kill 'net.dot.System.IO.FileSystem.Net5Compat.Tests' (7383), uid 10115, oom_adj 0 to free 2107432kB

Logs can be gotten from Work Item System.IO.FileSystem.Net5Compat.Tests in job 1db68265-e405-4d05-9dd7-cb05a69b84ff

in particular https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-46417-merge-1db68265e4054d059d/System.IO.FileSystem.Net5Compat.Tests/adb-logcat-net.dot.System.IO.FileSystem.Net5Compat.Tests-net.dot.MonoRunner.log?sv=2019-07-07&se=2021-08-03T20%3A09%3A04Z&sr=c&sp=rl&sig=NYCkCCBJSiwncQMds3ExUXcQiYOEFx3Ki%2BjTO5vv65I%3D

hit in #46417

Author:	danmoseley
Assignees:	-
Labels:	area-Infrastructure-mono, area-System.IO, os-android
Milestone:	-

[adamsitnik]

Is this the only test project that fails with OOM on Android? I am asking because we plan to remove it in .NET 7 (#55196)

[steveisok]

No, there are others and it's pretty random. I don't think this test is necessarily the cause.

[steveisok]

Closing as the suite is no longer in .NET 7 and I haven't seen lowmem errors in emulators for a while.