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  1. JDK
  2. JDK-6942632

Hotspot should be able to use more than 64 logical processors on Windows

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    • b26
    • generic
    • windows_7

        Windows 7 and Windows Server 2008 R2 implement "processor groups" that, with some complication, allow a single process to use more than 64 hardware threads. This mechanism is distinct from the NUMA mode facility, which focuses on allocating threads to NUMA domains, e.g., a single multi-core socket. Without support for processor groups, a single jvm instance can't use more than 64 hw threads.

        See

        http://msdn.microsoft.com/en-us/library/dd405503(VS.85).aspx

        and

        http://msdn.microsoft.com/en-us/library/dd405503(VS.85).aspx

        and, for NUMA

        http://msdn.microsoft.com/en-us/library/aa363804(v=VS.85).aspx
        Linxux and Solaris have no such limitation.

              swesonga Saint Wesonga
              phh Paul Hohensee
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