RFR: 8319048: Monitor deflation unlink phase prolongs time to safepoint

[Y. Srinivas Ramakrishna]

On Mon, 6 Nov 2023 05:50:54 GMT, David Holmes <dholmes at openjdk.org> wrote:

> > Is there anything special happening during those benchmark runs?
> 
> I have no way to answer that. The benchmarks are run in our performance measurement system, which is just a black-box to me. I tell it what benchmarks to run, and point it to the two binaries and then I get a bunch of results. FWIW I see for baseline versus patched:
> 
> ```
> 77.73± 1.65 | 122.95± 44.39  p = 0.001
> ```
> 

@dholmes-ora : Which benchmark are these numbers with (and on which platform/os/isa)? Additional info from `-Xlog:monitorinflation` (on baseline & specimen), as @shipilev indicated, might shed some more light.

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PR Comment: https://git.openjdk.org/jdk/pull/16412#issuecomment-1799919189