RFR: Changes to simplify MU accounting

[Kelvin Nilsen]

On Thu, 11 May 2023 01:15:04 GMT, Y. Srinivas Ramakrishna <ysr at openjdk.org> wrote:

>> This represents a small part of the expand-old-on-demand branch.  By itself, this may result in some performance regression because we no longer use MU (mutator utilization) reports to guide generation sizing decisions.  On the other hand, the guidance provided by MU metrics does not seem to be a very accurate predictor of ideal generation sizes.
>
> src/hotspot/share/gc/shenandoah/shenandoahMmuTracker.cpp line 296:
> 
>> 294:   }
>> 295: 
>> 296:   // With simplified MU implementation, we no longer use _mmu_tracker->average to trigger resizing
> 
> Delete, rather than comment out. You can just leave a comment to motivate the deletion if you think that would help reviewers.

this code has been removed from expand-old-on-demand.

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PR Review Comment: https://git.openjdk.org/shenandoah/pull/274#discussion_r1202929884