[jdk11u-dev] RFR: 8231111: Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy [v3]

Zhengyu Gu zgu at openjdk.java.net
Fri Mar 11 18:21:10 UTC 2022


> This is a followup backport for Cgroup v2 support.
> 
> The original patch does not apply cleanly, due to context differences and some of out-of-order backports, conflicts were resolved manually.
> 
> In additional:
> 
> 1) Include partial backport of JDK-8250627.
>     - Renamed `Metrics.c` =>  `CgroupMetrics.c`
>     - Added native method `isUseContainerSupport()` to `CgroupMetrics.java`
>     - Return instance only if `isUseContainerSupport()` is enabled.
>    
> 2) Add `createTempDirectory()` method to `test/lib/jdk/test/lib/Utils.java` for `TestCgroupSubsystemController.java` test
> 
> 3) Add `import jdk.test.lib.process.OutputAnalyzer;` to `TestDockerMemoryMetrics.java`
> 
> Test:
> 
> - [x] jtreg containers/docker test on Ubuntu 20.04.4 LTS
> - [x] jdk/internal/platform/cgroup on Ubuntu 20.04.4 LTS
> - [x] jdk/internal/platform/docker on Ubuntu 20.04.4 LTS

Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:

  Fix indents and whitespaces

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/863/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/863/files/d5d4fa02..8545c356

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=863&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=863&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/863.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/863/head:pull/863

PR: https://git.openjdk.java.net/jdk11u-dev/pull/863


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