[jdk8u-dev] RFR: 8230305: Cgroups v2: Container awareness

[Jonathan Dowland]

On Mon, 3 Oct 2022 09:57:22 GMT, Jonathan Dowland <jdowland at openjdk.org> wrote:

> This is a backport of 8230305 (Cgroups v2: Container awareness) for JDK8u, working from the jdk11u-dev backport as part of an effort to backport cgroups v2 to jdk8u-dev.
> 
> The patch does not apply clean after unshuffling and path fixing:
> 
>  * mostly copyright line issues
>  * different package name for jdk.test.lib.process.OutputAnalyzer
>  * Most of hotspot/src/os/linux/vm/cgroupSubsystem_linux.cpp failed due to context changes, manually resolved (mostly deletions)
> 
> A few other changes were made
> 
>  *  Rework use of newer logging API (log_debug etc) to use guarded tty->print_cr
>  *  replace os::strerror with the libc strerror (which is thread unsafe, but that should be addressed by backporting 8148425 separately)
> 
> patch touched hotspot/test/runtime/containers/docker/TestCPUAwareness.java which passes afterwards; I'm running further tests now (and awaiting GitHub CI doing the same)

Local test failure observed in runtime/containers/docker/TestMemoryAwareness.java:

JavaTest Message: Test threw exception: java.lang.RuntimeException: 'Memory Soft Limit.*524288000' missing from stdout/stderr 

this might be [JDK-8253714](https://bugs.openjdk.org/browse/JDK-8253714), which is on the list to backport, I'll look at this next.

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PR: https://git.openjdk.org/jdk8u-dev/pull/127