RFR: 8236926: Concurrently uncommit memory in G1 [v7]

[Thomas Schatzl]

On Wed, 18 Nov 2020 13:28:57 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> src/hotspot/share/gc/g1/g1UncommitRegionTask.cpp line 83:
>> 
>>> 81:   _summary_duration += time;
>>> 82: 
>>> 83:   log_trace(gc, heap)("Concurrent Uncommit: " SIZE_FORMAT "%s, %u regions, %1.3fms",
>> 
>> Maybe use gc+heap+region here (and below) like other code; imho after all this task is kind of an extension of the `HeapRegionManager`. I did not look at the output though.
>
> My idea is to use `gc+heap+region` for transitions on a region level and `gc+heap` for the actual changes to the heap. See the PR description for some examples.

Okay.

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PR: https://git.openjdk.java.net/jdk/pull/1141