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  1. Harmony
  2. HARMONY-5277 [startup][performance] general optimizations
  3. HARMONY-5281

[drlvm][startup][performance][classloader] mapping bootstrap jars directly into memory

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • None
    • DRLVM
    • None
    • Patch Available

    Description

      Bootstrap jar files mapping : we can deliver from a big amount of system calls (such as lseek, read etc) by mapping jars into memory via CreateFileMapping for windows and nmap for linux. Then we can work using pointer arithmetic only.
      The same can be done with classlib jars also..

      Attachments

        1. jarmapping.BCP.patch
          7 kB
          Naumova Natalya
        2. bootstrap_jar_mapping.patch
          11 kB
          Pavel Pervov

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. HARMONY-2436 [classlib][archive] Reading from a closed Jar file is allowed

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

          Activity

            People

              mcfirst Pavel Pervov
              nsnaumova Naumova Natalya
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              Dates

                Created:
                Updated:
                Resolved: