RFR: 8163413: gc/metaspace/TestMetaspacePerfCounters failure

[Erik Helin]

On 2016-08-16, Stefan Johansson wrote:
> Hi,
> 
> Please review this test fix for:
> https://bugs.openjdk.java.net/browse/JDK-8163413
> 
> Webrev:
> http://cr.openjdk.java.net/~sjohanss/8163413/hotspot.00/

Looks ok, Reviewed.

Thanks,
Erik

> Summary:
> The test failure is most likely caused by getting a GC in between the calls
> to get the perf counter values. Since the values are updated during a GC
> this might cause the values to break the assert conditions. To avoid this my
> fix checks the number of GCs that have been done before and after getting
> the values and only proceeds to doing the assertions if no GC occurred.
> 
> Testing:
> * Verified test both locally and with RBT.
> 
> Thanks,
> Stefan