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  1. JDK
  2. JDK-6507548

REGRESSION: slower performance of GZIPInputStream for 5u10 (multi threaded testcase)

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Not an Issue
    • Affects Version/s: 5.0u10
    • Fix Version/s: None
    • Component/s: core-libs
    • Labels:

      Description

      5u6 is faster than 5u7 (resp. 5u10) if we compare the performance of the GZIPInputStream with a multi threaded testcase.

      Customer claims that on his v880 and v890 servers (4 CPUs resp. 4 cores) the multi threaded testcase is faster on 5u6 than on any other later update release.

      The problem is reproducible. The following tests has been made on a SunBlade 2000 (2 CPUs, 2 Threads) on Solaris/sparc. The testcase is a multi threaded version of the single threaded testcase from CR 6507183.

      java version "1.5.0_06"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
      Java HotSpot(TM) Server VM (build 1.5.0_06-b05, mixed mode)
      time: 12863
      time: 12877
      time: 12763

      java version "1.5.0_07"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
      Java HotSpot(TM) Server VM (build 1.5.0_07-b03, mixed mode)
      time: 16620
      time: 16336
      time: 15949

      java version "1.5.0_10"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
      Java HotSpot(TM) Server VM (build 1.5.0_10-b03, mixed mode)
      time: 16741
      time: 16365
      time: 16039

      java version "1.6.0"
      Java(TM) SE Runtime Environment (build 1.6.0-b105)
      Java HotSpot(TM) Server VM (build 1.6.0-b105, mixed mode)
      time: 15408
      time: 15605
      time: 15746

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              • Assignee:
                bristor Dave Bristor
                Reporter:
                jloefflm Johann Löfflmann (Inactive)
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                • Created:
                  Updated:
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