RFR: 8315149: Add hsperf counters for CPU time of internal GC threads [v24]

[Man Cao]

On Wed, 20 Sep 2023 00:39:44 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Jonathan Joo has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix build issues
>
> src/hotspot/share/gc/shared/collectedHeap.cpp line 161:
> 
>> 159: }
>> 160: 
>> 161: void CollectedHeap::inc_total_cpu_time(long diff) {
> 
> We don't use `long` in shared code as it has different size on different platforms.

Using `long` is to avoid build failure on 32-bit ARM and x86. `jlong` is `long long` on 32-bit, and Atomic template does not support `long long` on 32-bit. Example failure: https://github.com/jjoo172/jdk/actions/runs/6229455243/job/16907994694.

Is there a better way to avoid these failures on 32-bit?

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PR Review Comment: https://git.openjdk.org/jdk/pull/15082#discussion_r1333718984