RFR: CODETOOLS-7903560: JMH: async profiler reports only the last fork result [v2]

[Jonas Konrad]

On Tue, 20 Feb 2024 07:29:18 GMT, Jonas Konrad <duke at openjdk.org> wrote:

>> Without this change, async-profiler would write the same result in each fork, overwriting the previous result.
>> 
>> This patch introduces a new "FileResult" class that collects the output paths of each benchmark. In `afterTrial`, the output files are moved to a new path that includes the pid (fork number would be an alternative but it's not as easily available).
>> 
>> At the moment, results of different runs are not coalesced. But with these changes, it would be easy to coalesce at least the results of the "collapsed" output mode. I plan to do this in another PR.
>
> Jonas Konrad has updated the pull request incrementally with one additional commit since the last revision:
> 
>   address review

except the tests fail. sec.

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PR Comment: https://git.openjdk.org/jmh/pull/121#issuecomment-1953625739