RFR: 8229044: G1RedirtyCardsQueueSet should be local to a collection
kim.barrett at oracle.com
Thu Aug 15 05:32:42 UTC 2019
> On Aug 14, 2019, at 6:17 PM, sangheon.kim at oracle.com wrote:
> Hi Kim,
> On 8/3/19 12:22 PM, Kim Barrett wrote:
>>> On Aug 3, 2019, at 3:10 PM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
>>> On 03.08.19 01:43, Kim Barrett wrote:
>>>> Please review this change to the use of G1RedirtyCardsQueueSet.
>>>> Rather than a singleton instance in the G1CollectedHeap that is reused
>>>> by each collection pause, we now (stack) allocate one for use by the
>>>> current collection pause.
>>>> mach5 tier1-5
>>> looks good. Thanks.
>>> I was wondering whether at some point we should extract all transient GC state coupled with the actual algorithms applied into a separate class. But that's probably something for the future :)
>> I thought about putting the redirty set directly in the ParScanThreadStateSet with an
>> accessor and passing that set to more places, but that seemed like it would make it
>> more difficult to understand the usage of the ParScanThreadState[Set].
>> I also thought about putting it in the EvacuationInfo, but what’s there seems to be
>> accounting stuff and not otherwise interesting data structures. And again, I’d probably
>> prefer to extract the redirty set to pass into call trees that need it and not all the other
>> I think part of the problem is that there’s just a lot of varied state shared between various
>> largish pieces of the collector. Finding ways to reduce that would be nice, but detangling
>> is often hard work.
> Looks good.
> And it would be really nice if above ideas are accomplished. :)
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