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  1. JDK
  2. JDK-8072434

JDK-8064457: introduces performance regressions in 9-b47

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 9
    • Component/s: hotspot
    • Subcomponent:
    • Introduced In Build:
      b47
    • Introduced In Version:
      9
    • Resolved In Build:
      b52
    • CPU:
      x86_64, sparc_64
    • OS:
      linux_oracle_6.0, solaris_11
    • Verification:
      Verified

      Backports

        Description

        Performance measurement of 9-b47 shows 2-8% performance regressions across a broad range of benchmarks. Solaris-Sparc, Linux-x64, and Solaris-x64 show the most impact.

        Using a subset of benchmarks:
            - javacjdk7 across the 3 platforms ~ to check cross platform effect,
            - SPECjvm2008-MPEG and -Serial on Solaris-Sparc only.

        I ran a quick check of the before and after builds (provided by Coleen) for the integration of
        JDK-8064457 -- Introduce compressed oops mode "disjoint base" and improve compressed heap handling.

        Those results show similar regression levels on the benchmark subset.

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                • Assignee:
                  coleenp Coleen Phillimore
                  Reporter:
                  resii Robert Strout
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                  Dates

                  • Created:
                    Updated:
                    Resolved: