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  1. JDK
  2. JDK-8155917

Memory access in free regions during G1 full gc causes regressions in SPECjvm2008 scimark.fft,lu,sor,sparse with 9+116 on Linux-x64

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    • gc
    • b137
    • generic
    • linux
    • Verified

    Description

      FFT in particular regress in build 116 compared to 115, with more marking rounds and GCs during the benchmark run. The regression shows up with and without large pages enabled.

      As this might be ergo-related, testing impact of JDK-8077144 might be a good first step.

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          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. JDK-8161147 jvm crashes when -XX:+UseCountedLoopSafepoints is enabled

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-5014723 implement "strip mining" loop optimization

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8073321 assert(q > prev_q) failed: we should be moving forward through memory

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8077144 Concurrent mark initialization takes too long

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

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              tschatzl Thomas Schatzl
              redestad Claes Redestad
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                Updated:
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