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  1. JDK
  2. JDK-8319713

Parallel: Remove PSAdaptiveSizePolicy::should_full_GC

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    • gc
    • b26

    Backports

      Description

        Before starting young-gc (`PSScavenge::invoke`), we check if the upcoming yonug-gc should be upgraded to full-gc, based on history data (`PSScavenge::should_attempt_scavenge`), with the goal of avoiding promotion-failure during the upcoming young-gc.

        After a successful young-gc, we check again (`PSAdaptiveSizePolicy::should_full_GC`) if a full-gc should follow to avoid future promotion-failure. (Ofc, if young-gc fails, we upgrade to full-gc.)

        The after-success-young-gc check can be quite conservative; remove it to avoid unnecessary full-gc.

        (The attachment shows a full-gc starts when it's not really needed. Running: `java -Xms3g -Xmx3g -XX:+UseParallelGC -XX:NewSize=1g pgc_full_gc.java`)

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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-8331423 Parallel: Remove PSAdaptiveSizePolicy::should_full_GC

            • 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-8333314 Parallel: Remove PSAdaptiveSizePolicy::should_full_GC

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8320916 jdk/jfr/event/gc/stacktrace/TestParallelMarkSweepAllocationPendingStackTrace.java failed with "OutOfMemoryError: GC overhead limit exceeded"

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8328744 Parallel: Parallel GC throws OOM before heap is fully expanded

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

            Commit Commit openjdk/jdk17u-dev/7a8cf6c8

            Commit Commit openjdk/jdk21u-dev/5d5c6789

            Commit Commit openjdk/jdk/4bcda602

            Review Review openjdk/jdk17u-dev/2450

            Review Review openjdk/jdk21u-dev/536

            Review Review openjdk/jdk/16560

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                ayang Albert Yang
                ayang Albert Yang
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