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  1. JDK
  2. JDK-8307346

Add missing gc+phases logging for ObjectCount(AfterGC) JFR event collection code

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    • b22

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      Description

        (Provisionally assigning this to myself, but Oli Gillespie [not an Author yet] would do the actual work)

        Collecting the data for object count events can be expensive (seconds). The G1 concurrent collector has a debug timer for this phase, but Serial, Parallel and G1 full collector are missing this logging, which can cause confusion for the user who sees long pauses with no explanation. Other collectors (ZGC, Shenandoah, Epsilon) do not emit this event, so are not in scope.

        The usual -Xlog:gc+phases=debug should show it.

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            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-8308298 Add missing gc+phases logging for ObjectCount(AfterGC) JFR event collection code

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8308693 Add missing gc+phases logging for ObjectCount(AfterGC) JFR event collection code

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

            Enhancement - null JDK-8199712 Flight Recorder

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

            Commit Commit openjdk/jdk17u-dev/61c73517

            Commit Commit openjdk/jdk20u/9997c714

            Commit Commit openjdk/jdk/3f1927a7

            Review Review openjdk/jdk17u-dev/1344

            Review Review openjdk/jdk20u/79

            Review Review openjdk/jdk/13772

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                ogillespie Oli Gillespie
                shade Aleksey Shipilev
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                  Updated:
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