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Bug
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Resolution: Fixed
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P4
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8-shenandoah, 11-shenandoah, 13, 14
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b18
Seen with serviceability/sa/ClhsdbFlags.java, which sets ParallelGCThreads=1. Then Shenandoah heuristics acts and sets ConcGCThreads=2. Then Shenandoah adjustment kicks in, figures ParallelGCThreads < ConcGCThreads, and bumps ParallelGCThreads to 2, overriding the user setting and failing the test.
$ CONF=linux-x86_64-server-fastdebug make images run-test TEST=serviceability/sa/ClhsdbFlags.java TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC"
hashCode = 5 default
]
exitValue = -1
LingeredApp stdout: [];
LingeredApp stderr: [OpenJDK 64-Bit Server VM warning: Shenandoah expects ConcGCThreads <= ParallelGCThreads, adjusting ParallelGCThreads automatically
]
LingeredApp exitValue = 0
java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: 'ParallelGCThreads = 1' missing from stdout/stderr
$ CONF=linux-x86_64-server-fastdebug make images run-test TEST=serviceability/sa/ClhsdbFlags.java TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC"
hashCode = 5 default
]
exitValue = -1
LingeredApp stdout: [];
LingeredApp stderr: [OpenJDK 64-Bit Server VM warning: Shenandoah expects ConcGCThreads <= ParallelGCThreads, adjusting ParallelGCThreads automatically
]
LingeredApp exitValue = 0
java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: 'ParallelGCThreads = 1' missing from stdout/stderr
- relates to
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JDK-8225229 Shenandoah: trim down default number of GC threads
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- Resolved
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