[jdk8u-dev] Integrated: 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)

This pull request has now been integrated.

Changeset: 7eb2803b
Author:    Jonathan Dowland <jdowland at openjdk.org>
URL:       https://git.openjdk.org/jdk8u-dev/commit/7eb2803b5b3c769827cf02cc40a15b13b74bf588
Stats:     2094 lines in 10 files changed: 1461 ins; 596 del; 37 mod

8230305: Cgroups v2: Container awareness
8216366: Add rationale to PER_CPU_SHARES define
8229202: Docker reporting causes secondary crashes in error handling
8232207: Linux os::available_memory re-reads cgroup configuration on every invocation
8254997: Remove unimplemented OSContainer::read_memory_limit_in_bytes

Implement Cgroups v2 container awareness in hotspot

Reviewed-by: sgehwolf, andrew
Backport-of: d462a6b5c9bd3dae5257cca42ea38c19cb742e3c

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