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  1. JDK
  2. JDK-8329030 Intel Advanced Performance Extension support
  3. JDK-8367780

Enable UseAPX on Intel CPUs only when both APX_F and APX_NCI_NDD_NF cpuid features are present

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    • Icon: Sub-task Sub-task
    • Resolution: Unresolved
    • Icon: P3 P3
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      As per the latest update to the Intel APX specification (https://www.intel.com/content/www/us/en/content-details/861610/intel-advanced-performance-extensions-intel-apx-architecture-specification.html ), when APX_F is set, processors also provide CPUID leaf 0x29 (APX Advanced Performance Extensions Leaf). Any Intel processor that enumerates APX_F also enumerates APX_NCI_NDD_NF.

      This APX subtask will enhance the HotSpot x86 CPU feature detection to recognize the APX_NCI_NDD_NF sub-feature of Intel APX, which is enumerated via the Intel APX CPUID leaf.

            sparasa Srinivas Parasa
            sparasa Srinivas Parasa
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              Created:
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