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  1. JDK
  2. JDK-8188773

PPC64 and s390: Fix UseMembar and enable ShareVtableStubs

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P4 P4
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    • ppc, s390x

      On PPC64, we currently generate unnecessary fence instructions which make performance even worse.
      On s390, the signal handler needs a fix in order to work with -XX:+UseMember.
      In addition, switch on ShareVtableStubs in order to reduce code cache usage. Modern processors don't seem to benefit from having it off it since the predictors have become better.

            mdoerr Martin Doerr
            mdoerr Martin Doerr
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