8230305: Cgroups v2: Container awareness #840
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This backport pull request has now been updated with issue and summary from the original commit. |
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This seems fine. A few minor comments.
Aside: We need to devise a plan how we want to deal with integrating this set of patches. For example I'm seeing test failures of the hotspot container tests on a cgroups v2 system due to https://bugs.openjdk.java.net/browse/JDK-8253714.
| @@ -68,8 +67,7 @@ class OSContainer: AllStatic { | |||
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| inline bool OSContainer::is_containerized() { | |||
| assert(_is_initialized, "OSContainer not initialized"); | |||
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This is essentially a backport of https://bugs.openjdk.java.net/browse/JDK-8229202 please mention that issue in the backport (/issue add JDK-8229202). Not sure if this will work for a backport.
| /* | ||
| * PER_CPU_SHARES has been set to 1024 because CPU shares' quota | ||
| * is commonly used in cloud frameworks like Kubernetes[1], | ||
| * AWS[2] and Mesos[3] in a similar way. They spawn containers with | ||
| * --cpu-shares option values scaled by PER_CPU_SHARES. Thus, we do | ||
| * the inverse for determining the number of possible available | ||
| * CPUs to the JVM inside a container. See JDK-8216366. | ||
| * | ||
| * [1] https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/#meaning-of-cpu | ||
| * In particular: | ||
| * When using Docker: | ||
| * The spec.containers[].resources.requests.cpu is converted to its core value, which is potentially | ||
| * fractional, and multiplied by 1024. The greater of this number or 2 is used as the value of the | ||
| * --cpu-shares flag in the docker run command. | ||
| * [2] https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ContainerDefinition.html | ||
| * [3] https://github.com/apache/mesos/blob/3478e344fb77d931f6122980c6e94cd3913c441d/src/docker/docker.cpp#L648 | ||
| * https://github.com/apache/mesos/blob/3478e344fb77d931f6122980c6e94cd3913c441d/src/slave/containerizer/mesos/isolators/cgroups/constants.hpp#L30 | ||
| */ |
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This is essentially a backport of https://bugs.openjdk.java.net/browse/JDK-8216366. Perhaps add this issue as part of the backport (/isssue add JDK-8216366).
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@zhengyu123 This change now passes all automated pre-integration checks. After integration, the commit message for the final commit will be: You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed. At the time when this comment was updated there had been no new commits pushed to the
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/issue add JDK-8229202 |
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@zhengyu123 |
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@zhengyu123 |
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@jerboaa Thanks for the review. |
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For me, (I noticed this in a downstream backport and traced it back up here) I've put my JTreport here: https://jmtd.net/tmp/jdk11u_8230305_PlainRead_jtreport/JTreport/html/index.html Edit: @jerboaa points out that this is probably JDK-8278951, although backporting that does not fix the test for me locally. I'll keep exploring. Edit 2: fails for me on jdk17u-dev master, passes on jdk master. |
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Mailing list message from Zhengyu Gu on jdk-updates-dev: On 3/11/22 10:52, Jonathan Dowland wrote:
Yes, I noticed. I would suggest you postpone your backport until the -Zhengyu |
Note that the This shouldn't block this backport. |
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/integrate |
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Going to push as commit 8715f37. |
openjdk
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@zhengyu123 Pushed as commit 8715f37. |
I would like backport cgroups v2 support to openjdk11u.
The original patch does not apply cleanly, conflicts are resolved manually.
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