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  1. JDK
  2. JDK-8060116

After JDK-8047976 gc/g1/TestSummarizeRSetStatsThreads fails

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Details

    • Bug
    • Resolution: Fixed
    • P2
    • 9
    • 8u40, 9
    • hotspot
    • gc
    • b37
    • generic
    • generic

    Backports

      Description

        JDK-8047976 changes the logic of G1ConcRefinementThreads processing:
        previously when G1ConcRefinementThreads was zero, ConcurrentG1Refine::thread_num returned max(ParallelGCThreads, 1).
        So when both ParallelGCThreads and G1ConcRefinementThreads were zeros, at least one conc refinement thread was used.
        After JDK-8047976 integration into 8u40 if G1ConcRefinementThreads=0 passed to JVM, then its value updated to ParallelGCThreads.
        Since JDK-8059527 was not backported to 8u40, ParallelGCThreads still could be 0, and in this case G1ConcRefinementThreads will be zero too.

        Following test fails for the case when both ParallelGCThreads & G1ConcRefinementThreads were set to zero, because G1RemSetSummary::print_on don't print RS threads time due to absence of such threads:
        gc/g1/TestSummarizeRSetStatsThreads.java

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8063347 After JDK-8047976 gc/g1/TestSummarizeRSetStatsThreads fails

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8071083 After JDK-8047976 gc/g1/TestSummarizeRSetStatsThreads fails

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8083417 After JDK-8047976 gc/g1/TestSummarizeRSetStatsThreads fails

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8060131 After JDK-8047976 gc/g1/TestSummarizeRSetStatsThreads fails

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Enhancement - null JDK-8059527 Disallow ParallelGCThreads=0 for G1

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-8047976 Ergonomics for GC thread counts should update the flags

            • P5 - Cosmetic problem like misspelt words or misaligned text.
            • Resolved

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                mlarsson Marcus Larsson (Inactive)
                fzhinkin Filipp Zhinkin
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                  Created:
                  Updated:
                  Resolved: