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  1. JDK
  2. JDK-8157952

Parallelize Memory Pretouch

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    • gc
    • b139

    Description

      On large machines (1 TB heap), pretouching the heap takes around 10mins.
      Considering that we are aiming for even larger heap, that is too slow.
      There are some indications that there is potential for improvements if parallelized.

      Investigate this.

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          relates to

          Enhancement - null JDK-8280496 Remove unused G1PageBasedVirtualSpace::pretouch_internal

          • 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-8213927 G1 ignores AlwaysPreTouch when UseTransparentHugePages is enabled

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8169703 G1 crashes with guarantee(pretouch_gang != NULL) failed: No pretouch gang specified

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

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              tschatzl Thomas Schatzl
              tschatzl Thomas Schatzl
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                Created:
                Updated:
                Resolved: