RFR: JDK-8307314: Implementation: Generational Shenandoah (Experimental)

[Y. Srinivas Ramakrishna]

On Thu, 1 Jun 2023 12:15:37 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Issues already reported to GenShen engineers:
> 
> gc/shenandoah/TestElasticTLAB.java#generational #  Internal Error (src\hotspot\share\gc\shenandoah\shenandoahFreeSet.cpp:695), pid=23288, tid=23784 #  assert(size % CardTable::card_size_in_words() == 0) failed: size must be multiple of card table size, was 258
> 
> gc/stress/gcold/TestGCOldWithShenandoah.java#generational #  Internal Error (src\hotspot\share\gc\shenandoah\heuristics\shenandoahOldHeuristics.cpp:82), pid=20828, tid=5836 #  assert(_old_generation->available() > old_evacuation_budget) failed: Cannot budget more than is available
> 
> gc/shenandoah/oom/TestAllocOutOfMemory.java#large Execution failed: `main' threw exception: java.lang.RuntimeException: 'java.lang.OutOfMemoryError: Java heap space' missing from stdout/stderr (Issue with 64k Pages)
> 
> gc/shenandoah/TestRetainObjects.java#no-tlab gc/shenandoah/TestSieveObjects.java#no-tlab Timeouts.
> 
> gc/shenandoah/TestAllocObjects.java#generational gc/shenandoah/TestDynamicSoftMaxHeapSize.java#generational #  Internal Error src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp:664), pid=18434, tid=29955 #  assert(is_global() || ShenandoahHeap::heap()->is_full_gc_in_progress() || (_used + _humongous_waste <= _affiliated_region_count * ShenandoahHeapRegion::region_size_bytes())) failed: used cannot exceed regions

Thanks @TheRealMDoerr ; could you specify the platforms on which you see these failures, so we have a better chance at reproducing them? Thanks!

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PR Comment: https://git.openjdk.org/jdk/pull/14185#issuecomment-1572528277