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  1. JDK
  2. JDK-8276796

gc/TestSystemGC.java large pages subtest fails with ZGC

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    • Subcomponent:
      gc
    • Resolved In Build:
      b24

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        Description

        gc/TestSystemGC.java fails on my system like this:

        $ CONF=linux-x86_64-server-fastdebug make test TEST=gc/TestSystemGC.java TEST_VM_OPTS="-XX:+UseZGC"
        ...

        STDOUT:
        [0.026s][error][gc] Failed to commit memory (Not enough space)
        [0.026s][error][gc] Failed to commit memory (Not enough space)
        [0.026s][error][gc] Failed to commit memory (Not enough space)
        [0.026s][error][gc] Failed to commit memory (Not enough space)
        [0.026s][error][gc] Forced to lower max Java heap size from 1006M(100%) to 784M(78%)
        [0.026s][error][gc] Failed to allocate initial Java heap (1006M)
        STDERR:
        Error: Could not create the Java Virtual Machine.
        Error: A fatal exception has occurred. Program will exit.

        Started with JDK-8269077.

        The system where it fails has 1G hugetlbfs configured:

        HugePages_Total: 512
        HugePages_Free: 512
        HugePages_Rsvd: 0
        HugePages_Surp: 0
        Hugepagesize: 2048 kB
        Hugetlb: 1048576 kB

        This looks enough for G1 and other GCs to work, but apparently not for ZGC. Adding -Xmx128m makes the test pass with ZGC.

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                Assignee:
                shade Aleksey Shipilev
                Reporter:
                shade Aleksey Shipilev
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                  Updated:
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