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  1. JDK
  2. JDK-8151030

PPC64: AllocatePrefetchStyle=4 is out of range

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    • b21
    • ppc

    Description

        product(intx, AllocatePrefetchStyle, 1, \
                "0 = no prefetch, " \
                "1 = prefetch instructions for each allocation, " \
                "2 = use TLAB watermark to gate allocation prefetch, " \
                "3 = use BIS instruction on Sparc for allocation prefetch") \
                range(0, 3) \

      but PPC port has the following:

      src/cpu/ppc/vm/vm_version_ppc.cpp:
      ...
        if (AllocatePrefetchStyle == 4) {
          AllocatePrefetchStepSize = cache_line_size; // Need exact value.
          if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) AllocatePrefetchLines = 12; // Use larger blocks by default.
          if (AllocatePrefetchDistance < 0) AllocatePrefetchDistance = 2*cache_line_size; // Default is not defined?
        } else {

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            mdoerr Martin Doerr
            vlivanov Vladimir Ivanov
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              Created:
              Updated:
              Resolved: