RFR: Mixed evacuation [v6]

[Kelvin Nilsen]

On Wed, 21 Apr 2021 10:45:22 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> Kelvin Nilsen has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Change definition of CollectionThresholdGarbagePercent
>>   
>>   This is now defined to equal ShenandoahGarbageThreshold, which seems to have
>>   a default value of 25.  The effect on running workloads is to choose more
>>   regions for the collection set than was observed with the previous
>>   configuration.
>>   
>>   Also addressed several improvements in white space and comments.
>>   
>>   The code now runs tier1 and hotspot_gc_shenandoah without regressions.  It
>>   also succsessfully runs an Extremem stress test up until the point of
>>   failure due to triggering of full GC (after 113 completed GC passes, including
>>   two old-gen GC passes).
>
> src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.cpp line 99:
> 
>> 97:                      byte_size_in_proper_unit(min_garbage), proper_unit_for_byte_size(min_garbage));
>> 98: 
>> 99: 
> 
> We have a lone newline here.

Fixed in next commit

> src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveOldHeuristics.cpp line 2:
> 
>> 1: /*
>> 2:  * Copyright (c) 2018, 2019, 2021, Red Hat, Inc. All rights reserved.
> 
> Please, only put first and last year in copyright notice (from-to).

Fixed in next commit.

> src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveOldHeuristics.hpp line 2:
> 
>> 1: /*
>> 2:  * Copyright (c) 2018, 2019, 2021, Red Hat, Inc. All rights reserved.
> 
> Same as above.

Fixed in next commit.

-------------

PR: https://git.openjdk.java.net/shenandoah/pull/29