> This is a continuation of effort from > https://github.com/openjdk/jdk/pull/9533 to fix the ObjectStreamClassCaching > test which is failing with various GCs != G1. The test class contains 2 test > methods: > - test2CacheReleaseUnderMemoryPressure - this one was not logically changed > at all - just one method was inlined > - test1CacheEffectiveness - this one now uses a different strategy which > doesn't involve calling System.gc() in order to trigger reference processing > in GC which is, as test failures reveal, sometimes to aggressive and triggers > processing not only WeakReference(s) but also SoftReference(s). Instead, the > test now gradually builds up memory pressure while checking what's happening > to two WeakReference(s): ref1 - wrapping a cached ObjectStreamClass instance; > and: ref2 - wrapping a new Object() instance. The "effectiveness" of caching > is confirmed by verifying that weakly reachable new Object() referent of ref2 > is GC-ed earlier than softly reachable ObjectStreamClass referent of ref1. > The test now contains several @run(s) with explicitly selected set of GC > algorithms: G1, Parallel, ZGC, Shenandoah.
Peter Levart has updated the pull request incrementally with one additional commit since the last revision: Nits from review comments ------------- Changes: - all: https://git.openjdk.org/jdk/pull/9684/files - new: https://git.openjdk.org/jdk/pull/9684/files/88f29edd..493740ca Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=9684&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9684&range=01-02 Stats: 10 lines in 1 file changed: 0 ins; 2 del; 8 mod Patch: https://git.openjdk.org/jdk/pull/9684.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9684/head:pull/9684 PR: https://git.openjdk.org/jdk/pull/9684
