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  1. JDK
  2. JDK-8218049

Survivor MemoryMXBean used() size granularity is region based

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    • gc
    • b16

    Backports

      Description

        The used() of survivor space MemoryMXBean is based on region granularity. I.e. a survivor region can either be fully used or not.

        This causes failures for tests that use the used() value of that MemoryMXBean (linked below) as they do not expect such large jumps in usage after allocation of a few (more) objects in survivor space.

        This is day one behavior (and some of these tests have been excluded from testing for a long time now).

        After fixing, also re-enable the corresponding tests, verifying that they work again.

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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-8319088 Survivor MemoryMXBean used() size granularity is region based

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8081688 SurvivorAlignmentInBytes tests too lenient

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

            Enhancement - null JDK-8220089 G1 reuse survivor region as eden region at the end of gc

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8177765 gc/survivorAlignment/TestPromotionFromSurvivorToTenuredAfterMinorGC.java: Actual memory usage should not deviate from expected

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8190277 TestPromotionToSurvivor - Actual memory usage should not deviate from expected

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8129886 Test TestPromotionToSurvivor fails with jimage refresh

            • P5 - Cosmetic problem like misspelt words or misaligned text.
            • Closed
            is blocked by

            Enhancement - null JDK-8209062 Clean up G1MonitoringSupport

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

            Enhancement - null JDK-8221994 Improve consistency between actual values and MemoryUsage.used() in MBeans

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

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                sangheki Sangheon Kim
                tschatzl Thomas Schatzl
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                  Created:
                  Updated:
                  Resolved: