RFR: 8260408: Shenandoah: adjust inline hints after JDK-8255019

[Aleksey Shipilev]

On Tue, 26 Jan 2021 12:42:10 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> I was following up on performance testing results for some ongoing work, and realized that there are `ShenandoahMarkContext::mark_strong` calls from `mark_work_loop`. Those callees were supposed to be inlined. I believe it is a simple omission after JDK-8255019 moved `mark_work_loop` code to `shenandoahMark.cpp`.
>> 
>> On a typical workload:
>> 
>> # Before
>> [44.500s][info][gc,stats] Concurrent Marking  =    0.395 s (a =    11278 us) 
>>    (n =    35) (lvls, us =     6426,     9473,    11133,    12891,    16476)
>> 
>> # After
>> [44.405s][info][gc,stats] Concurrent Marking  =    0.337 s (a =     9636 us) 
>>    (n =    35) (lvls, us =     3770,     7383,     9785,    11328,    16776)
>> 
>> Additional testing:
>>  - [x] Eyeballing GC hot paths
>>  - [x] Ad-hoc performance tests
>
> Looks good from the build PoV.

Thanks, GHA reports all builds are green. I would not wait for tests.

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PR: https://git.openjdk.java.net/jdk/pull/2235