[9] RFR (S): 8148940: java/lang/ref/FinalizeOverride.java can time out due to frequent safepointing

[Aleksey Shipilev]

On 02/26/2016 02:16 PM, Tobias Hartmann wrote:
> 
> On 26.02.2016 11:50, Aleksey Shipilev wrote:
>> On 02/26/2016 01:47 PM, Tobias Hartmann wrote:
>>> I still wonder why we then do 2x compilations with ISC enabled? Do 
>>> the bootstrapped invokedynamic call sites invoke that many methods
>>> compared to the baseline without ISC?
>>
>> I think that's because current ISC not only prompts the compilation of
>> java.lang.invoke infra, but also spins up an anonymous class that holds
>> the concat stub (to be switched off in a few weeks), which would also
>> get compiled when hot.
> 
> Sure but it's surprising that this triggers the compilation of 81
> additional methods (or 1127 with -Xcomp). I think it makes sense to
> investigate and see if we can reduce the number of compilations.

Yes, java.lang.invoke infra has that many interesting methods. See my
comment here:
  https://bugs.openjdk.java.net/browse/JDK-8150717?focusedCommentId=13904458

...or these:
  http://cr.openjdk.java.net/~shade/8150717/compilation-oob.txt
  http://cr.openjdk.java.net/~shade/8150717/compilation-Xcomp.txt

Cheers,
-Aleksey


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