RFR: 8203359: Container level resources events [v8]

[Jaroslav Bachorik]

On Wed, 14 Apr 2021 11:17:14 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

>> Jaroslav Bachorik has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:
>> 
>>  - Roll back conditional registration of container events
>>  - Remove container events flag
>>  - Remove trailing spaces
>>  - Doh
>>  - Report container type and register events conditionally
>>  - Remove unused test files
>>  - Initial test support for JFR container events
>>  - Update the JFR control files
>>  - Split off the CPU throttling metrics
>>  - Formatting spaces
>>  - ... and 1 more: https://git.openjdk.java.net/jdk/compare/b72abe91...67a61bd7
>
> src/jdk.jfr/share/classes/jdk/jfr/events/ContainerMemoryUsageEvent.java line 46:
> 
>> 44: public final class ContainerMemoryUsageEvent extends AbstractJDKEvent {
>> 45:     @Label("Memory Pressure")
>> 46:     @Description("(attempts per second * 1000), if enabled, that the operating system tries to satisfy a memory request for any " +
> 
> This unit seems a bit strange. Do we really need to multiply by 1000?

This is taken as reported by cgroups - I didn't want to change the semantics so it does not confuse people familiar with cgroups.

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PR: https://git.openjdk.java.net/jdk/pull/3126