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  1. JDK
  2. JDK-8175813

PPC64: "mbind: Invalid argument" when -XX:+UseNUMA is used

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 10
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
      gc
    • Resolved In Build:
      b21
    • CPU:
      ppc
    • OS:
      linux

      Backports

        Description

        The JVM code used to discover which numa nodes it can bind assumes that nodes are consecutive and tries to bind from 0 to numa_max_node(), i.e. 0 to the highest node number available on the system. However, at least on PPC64 that assumption is not always true. For instance, the following numa
        topology:

        available: 4 nodes (0-1,16-17)
        node 0 cpus: 0 8 16 24 32
        node 0 size: 130706 MB
        node 0 free: 145 MB
        node 1 cpus: 40 48 56 64 72
        node 1 size: 0 MB
        node 1 free: 0 MB
        node 16 cpus: 80 88 96 104 112
        node 16 size: 130630 MB
        node 16 free: 529 MB
        node 17 cpus: 120 128 136 144 152
        node 17 size: 0 MB
        node 17 free: 0 MB
        node distances:
        node 0 1 16 17
        0: 10 20 40 40
        1: 20 10 40 40
        16: 40 40 10 20
        17: 40 40 20 10

        Also, some nodes can also be present in the topology but contain no memory (a memory-less node in libnuma terms).

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                • Assignee:
                  gromero Gustavo Romero
                  Reporter:
                  gromero Gustavo Romero
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                  • Created:
                    Updated:
                    Resolved: