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  1. JDK
  2. JDK-8266802

Shenandoah: Round up region size to page size unconditionally

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    Backports

      Description

        Since JDK-8265239, runtime/os/TestTracePageSizes.java fails with Shenandoah like this:

        # Internal Error (/home/buildbot/worker/test-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp:156), pid=55712, tid=55720
        # assert(_num_regions == (max_byte_size / reg_size_bytes)) failed: Must match

        This is because Shenandoah region sizes are rounded up to page size only when ShenandoahUncommit is true. In that test configuration, ShenandoahUncommit is false, because Xmx == Xms.

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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-8267499 Shenandoah: Round up region size to page size unconditionally

            • P3 - Major loss of function.
            • 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-8267560 Shenandoah: Round up region size to page size unconditionally

            • P3 - Major loss of function.
            • 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-8267779 Shenandoah: Round up region size to page size unconditionally

            • P3 - Major loss of function.
            • Resolved
            duplicates

            Bug - A problem which impairs or prevents the functions of the product. JDK-8266740 Shenandoah: Heap region count calculation still wrong after JDK-8265239

            • P3 - Major loss of function.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8265239 Shenandoah: Shenandoah heap region count could be off by 1

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8268127 Shenandoah: Heap size may be too small for region to align to large page size

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk16u/e0060a32

            Commit Commit openjdk/jdk/e5d3ee39

            Review Review openjdk/jdk16u/120

            Review Review openjdk/jdk/3945

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                shade Aleksey Shipilev
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