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  1. JDK
  2. JDK-8048179

Early reclaim of large objects that are referenced by a few objects

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    • gc
    • b47

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      Description

        JDK-8027959 introduces early reclamation of large objects that have no incoming references at all.

        Investigate relaxing this restriction (both effectiveness/time taken) by allowing reclamation of large objects with a few references (e.g. having only sparse table entries) - just iterate over them, and reclaim if we find out there are actually no references to it.

        Most likely this results in additional objects to be reclaimed, as the remembered set entries may be stale already.

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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-8078848 Early reclaim of large objects that are referenced by a few objects

            • 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-8083180 Early reclaim of large objects that are referenced by a few objects

            • 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-8086137 Early reclaim of large objects that are referenced by a few objects

            • 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-8086521 Early reclaim of large objects that are referenced by a few objects

            • 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-8137645 Early reclaim of large objects that are referenced by a few objects

            • 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-8069034 gc/g1/TestEagerReclaimHumongousRegionsClearMarkBits.java nightly failure

            • P1 - Blocks development and/or testing work, production could not run.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8069367 Eagerly reclaimed humongous objects left on mark stack

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

            Enhancement - null JDK-8027959 Early reclamation of large objects in G1

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

            Enhancement - null JDK-8058801 G1TraceReclaimDeadHumongousObjectsAtYoungGC only prints humongous object liveness output when there is at least one candidate humongous object

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

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                tschatzl Thomas Schatzl
                tschatzl Thomas Schatzl
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                  Updated:
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