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  1. JDK
  2. JDK-8195118

LoopStripMining causes performance regression

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    • Subcomponent:
    • Introduced In Build:
      b36
    • Introduced In Version:
      10
    • CPU:
      generic
    • OS:
      generic

      Description

      All DSA crypto benchmarks show a 6-7% regression on Solaris-SPARC with 10-b36... The regression hold at least through b39...

      • ~ 1.5% in SPECjbb2005-G1 on Solaris-SPARC

      • 2-5% in SHA1PRNG crypto benchmarks on Linux-x64, Mac-x64, and Solaris-SPARC:
         • micro.benchmarks.crypto.small.SecureRandomBench.nextBytes-algorithm:SHA1PRNG-dataSize:64-provider:-shared:false
         • micro.benchmarks.crypto.small.SecureRandomBench.nextBytes-algorithm:SHA1PRNG-dataSize:64-provider:-shared:true

      Reproduces in triage (repro run on same machine).
      Reproduces in re-triage (repro run on different machine).
      VMswap results indicate the cause is in the JVM.

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              Assignee:
              roland Roland Westrelin
              Reporter:
              resii Robert Strout
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                Updated:
                Resolved: