RFR: 8262953: [TESTBUG] Test /runtime/containers/cgroup/PlainRead.java fails if CPU quoata is not enabled

[Yasumasa Suenaga]

On Thu, 25 Mar 2021 20:11:30 GMT, Anton Ostrouhhov <github.com+22177208+aostrouhhov at openjdk.org> wrote:

> Hello!
> Both _CPU Quota_ and _CPU Period_ are missing from output if kernel was built without `CONFIG_CFS_BANDWIDTH`.
> 
> This is my first contribution so please tell me if i am wrong somewhere.

I agree with David, I think we should throw SkipException in this case.

OTOH this test can catch incorrect behavior if HotSpot could not get CPU related values from cgroups even if `CONFIG_CFS_BANDWIDTH` is configured. So I suggest to check `/boot/config-<kernel version>` in start of the test rather than throwing SkipException. If we cannot see `CONFIG_CFS_BANDWIDTH=y` in it, then we can throw SkipException.

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PR: https://git.openjdk.java.net/jdk/pull/3206