RFR: 8080345: With perm gen gone, perfdata counter sun.gc.policy.generations should be 2, not 3

[Thomas Schatzl]

Hi,

On Fri, 2017-11-24 at 16:38 +0100, Erik Helin wrote:
> Hi all,
> 
> I picked up this patch that Ramki posted quite a while ago: when I 
> updated the tooling I forgot to update the performance counter 
> 'sun.gc.policy.generations'. This patch takes care of this problem, 
> sun.gc.policy.generations now reports 2 instead of 3.
> 
> I also added a test that verifies the fix. As part of adding the test
> I 
> had to move the test support classes PerfCounter.java and 
> PerfCounters.java from test/hotspot/jtreg/gc/metaspace to 
> test/hotspot/jtreg/gc/testlibrary.
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8080345
> 
> Patch:
> http://cr.openjdk.java.net/~ehelin/8080345/00/
> 
> Testing:
> - hs tier1-5
> - newly added jtreg test
> - jstat and jstatd tests under test/jdk/sun/tools/jstat{d}

  looks good.

Thomas