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  1. JDK
  2. JDK-8296931

NMT tests slowed down considerably by JDK-8242181

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    • Enhancement
    • Resolution: Fixed
    • P4
    • 20
    • 20
    • hotspot
    • b24

    Description

      We noticed that NMT tests on our slower PPC machines started failing.

      The reason is that NMT detail reports have become 2-5x slower. This is caused by us now parsing the dwarf debug information to extract source information for each PC in each call stack. That is nice but costly.

      The slowdown is not limited to PPC, it affects all Elf platforms. On my Linux x64 box, runtime/NMT/VirtualAllocCommitMerge.java increased from 20 to 90 seconds.

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              stuefe Thomas Stuefe
              stuefe Thomas Stuefe
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                Updated:
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