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  1. JDK
  2. JDK-6594051

30% regression in scimark-small on x86 64-bits VM

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: 7
    • Fix Version/s: hs11
    • Component/s: hotspot
    • Subcomponent:
    • Introduced In Build:
      b03
    • Introduced In Version:
    • Resolved In Build:
      b05
    • CPU:
      x86
    • OS:
      solaris_10, windows_2003
    • Verification:
      Verified

      Backports

        Description

        The main regression was introduced with Chuck's putback:
        20070712074224.rasbold.c2_baseline0
        which fixed 6510732: Compute consistent block frequencies.

        Additional small regression was added by John's putback:
        20070719212032.jrose.6337834
        which had several fixes (main 6337834: JVM should remove unneeded zeroing).

        hsdev-3% cp /net/prt-archiver/data/archived_workspaces/main/c2_baseline/2007/20070711185532.kvn.6579347/solaris_amd64_compiler2/product/libjvm.so.gz ./ ; gunzip -f libjvm.so.gz
        hsdev-3% gamma jnt.scimark2.commandline
        Composite Score: 493.90508302589535
        FFT (1024): 295.0339288063497
        SOR (100x100): 633.2418727802554
        Monte Carlo : 170.86916576831587
        Sparse matmult (N=1000, nz=5000): 407.1823419814072
        LU (100x100): 963.198105793148

        hsdev-3% cp /net/prt-archiver/data/archived_workspaces/main/c2_baseline/2007/20070712074224.rasbold.c2_baseline0/solaris_amd64_compiler2/product/libjvm.so.gz ./ ; gunzip -f libjvm.so.gz
        hsdev-3% gamma jnt.scimark2.commandline
        Composite Score: 391.8510041234566
        FFT (1024): 298.26276080862385
        SOR (100x100): 631.7885370905
        Monte Carlo : 173.40790641588111
        Sparse matmult (N=1000, nz=5000): 279.9487302749625
        LU (100x100): 575.847086027316

        ...

        hsdev-3% cp /net/prt-archiver/data/archived_workspaces/main/c2_baseline/2007/20070718073059.nips.bug6579537-7/solaris_amd64_compiler2/product/libjvm.so.gz ./ ; gunzip -f libjvm.so.gz
        hsdev-3% gamma jnt.scimark2.commandline
        Composite Score: 392.4321377079277
        FFT (1024): 290.99777314160036
        SOR (100x100): 631.5814268475744
        Monte Carlo : 173.35191825601459
        Sparse matmult (N=1000, nz=5000): 290.62529314015256
        LU (100x100): 575.6042771542966

        hsdev-3% cp /net/prt-archiver/data/archived_workspaces/main/c2_baseline/2007/20070719212032.jrose.6337834/solaris_amd64_compiler2/product/libjvm.so.gz ./ ; gunzip -f libjvm.so.gz
        hsdev-3% gamma jnt.scimark2.commandline
        Composite Score: 376.36365792106426
        FFT (1024): 245.5293662051119
        SOR (100x100): 634.2840985767816
        Monte Carlo : 172.294904635646
        Sparse matmult (N=1000, nz=5000): 269.91763064562537
        LU (100x100): 559.7922895421565

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                Assignee:
                rasbold Chuck Rasbold
                Reporter:
                kvn Vladimir Kozlov
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                  Updated:
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