RFR: 8184765: Dynamically resize SystemDictionary

[Robbin Ehn]

Hi Gerard,

I looked at your pending v4 version. As mentioned in other forums the jtreg test 
should preferably be named TestXXX while the helper not starting with Test.

I don't need to see another webrev.

Looks good, thanks for fixing!

/Robbin

On 10/10/2017 10:40 PM, Gerard Ziemski wrote:
> hi all,
> 
> Please review this change that adds dynamic resizing of system dictionaries.
> 
> The biggest change is refactoring of the code that protects calculating of the table entry’s index using SystemDictionary_lock
> 
> A few notes:
> 
> - dynamic resizing is off when either dumping or using shared spaces
> - we remove the experimental runtime option “PredictedLoadedClassCount” and add “DynamicallyResizeSystemDictionaries” to turn the resizing off (it’s on by default)
> - the jtreg test uses stream of bytes to dynamically load numbered classes from memory instead of disk (thank you Ioi)
> 
> bug:    https://bugs.openjdk.java.net/browse/JDK-8184765
> webrev: http://cr.openjdk.java.net/~gziemski/8184765_rev1
> 
> 
> cheers
>