RFR: 8292206: TestCgroupMetrics.java fails as getMemoryUsage() is lower than expected

[David Holmes]

On Tue, 20 Dec 2022 00:03:25 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> The `testMemoryUsage()` test scenario queries the total memory usage of all processes of the current Linux user, including other concurrently running jtreg test cases. Even if the current process allocates 256MB of ram, it's possible for other dying processes to release much more than that amount. Therefore, it's not possible to guarantee that `Metrics.getMemoryUsage()` would return a higher number.
> 
> I am removing this test scenario for now as I don't see it providing any actual value.
> 
> If we want to have more in-depth functional tests for the `Metrics.getMemoryXXX()` APIs, we need to do it inside a container in a more controlled setting.

Removing this seems reasonable. Thanks for the explanation.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11734