RFR: 8291555: Implement alternative fast-locking scheme [v2]

Wed Jan 18 18:29:41 UTC 2023

On Wed, 18 Jan 2023 17:52:24 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Properly set ZF on anon-check path; avoid some conditional branches
>
> So far so good. If this passes I'll do some stressing.
> 
> This one fails runtime/logging/MonitorInflationTest.java missing an output.

@robehn how have you found this? This apparently slipped my testing because the test requires vm.flagless, but I would run it with TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseFastLocking". I have changed the log message from inflate(locked) to inflate(has_locker) so that it matches the current stack-locking output.

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PR: https://git.openjdk.org/jdk/pull/10907