Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-6810845

Performance regression in mpegaudio on x64

    XMLWordPrintable

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: hs15
    • Fix Version/s: hs15
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b05
    • CPU:
      x86
    • OS:
      solaris_10

      Backports

        Description

        The regression was introduced by changes in

        6743900: frequency based block layout

        Switching off BlockLayoutByFrequency does not help.

        i% gamma -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
        java version "1.6.0_06-p"
        Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
        OpenJDK 64-Bit Server VM (build 14.0-b06-2008-10-31-000942.never.6764622, mixed mode)

        ======= _222_mpegaudio Finished in 1.572 secs
        ======= _222_mpegaudio Finished in 1.238 secs
        ======= _222_mpegaudio Finished in 1.214 secs
        ======= _222_mpegaudio Finished in 1.213 secs
        ======= _222_mpegaudio Finished in 1.208 secs

        % gamma -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
        java version "1.6.0_06-p"
        Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
        OpenJDK 64-Bit Server VM (build 14.0-b06-2008-11-06-230423.rasbold.6743900, mixed mode)

        ======= _222_mpegaudio Finished in 1.786 secs
        ======= _222_mpegaudio Finished in 1.454 secs
        ======= _222_mpegaudio Finished in 1.425 secs
        ======= _222_mpegaudio Finished in 1.426 secs
        ======= _222_mpegaudio Finished in 1.422 secs

        % gamma -XX:-BlockLayoutByFrequency -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
        java version "1.6.0_06-p"
        Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
        OpenJDK 64-Bit Server VM (build 14.0-b06-2008-11-06-230423.rasbold.6743900, mixed mode)

        ======= _222_mpegaudio Finished in 1.799 secs
        ======= _222_mpegaudio Finished in 1.471 secs
        ======= _222_mpegaudio Finished in 1.446 secs
        ======= _222_mpegaudio Finished in 1.445 secs
        ======= _222_mpegaudio Finished in 1.441 secs

          Attachments

            Issue Links

              Activity

                People

                • Assignee:
                  kvn Vladimir Kozlov
                  Reporter:
                  kvn Vladimir Kozlov
                • Votes:
                  0 Vote for this issue
                  Watchers:
                  0 Start watching this issue

                  Dates

                  • Created:
                    Updated:
                    Resolved:
                    Imported:
                    Indexed: