8151460: Metaspace counters can have inconsistent values (original) (raw)

Per Liden per.liden at oracle.com
Tue Mar 22 15:28:49 UTC 2016

On 2016-03-22 14:35, Stefan Johansson wrote:

Hi,

Please review this test-fix to avoid the problems described in: https://bugs.openjdk.java.net/browse/JDK-8151460 Webrev: http://cr.openjdk.java.net/~sjohanss/8151460/hotspot.00/

Looks good to me.

/Per

Summary: Two of the metaspace perf-counter tests fails intermittently when run with -Xcomp. One reason this has been more frequent lately is a change to one of the tests that removed a System.gc() call. This call seems to be more important when running with -Xcomp. Having the System.gc() call is needed because the PerfCounters are only updated after a GC. And if any class loading/unloading happens after the call we can't do the assertions we are doing. When doing this fix I also realized that one of the tests hadn't changed UseCompressedKlassPointers to UseCompressedClassPointers, both the command-line and the test-code used the old version so I updated this as well. Testing: The updated tests pass in RBT. Thanks, Stefan

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