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LI76358: PWR7 MASS IMPROVEMENTS FOR MISALIGNED DATA

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Performance issues with MASS POWER7 libraries compared to
    POWER5/POWER6 equivalents on POWER7 hardware in applications
    where input and output data is commonly not aligned to 16-byte
    boundaries.
    

Local fix

  • N/A
    

Problem summary

  • PROBLEM DESCRIPTION:
    Poor performance of single-precision MASS routines in
    libmassvp7 compared to libmassvp5,vp6 on misaligned data.
    
    USERS AFFECTED:
    Users of single-precision MASS with -lmassvp7 or -qhot=vector
    -qtune=pwr7 .
    

Problem conclusion

  • Tuned POWER7 implementations to improve performance for
    misaligned data.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI76358

  • Reported component name

    XL MASS LIB COM

  • Reported component ID

    5724X1602

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2011-08-05

  • Closed date

    2011-10-28

  • Last modified date

    2011-10-28

  • APAR is sysrouted FROM one or more of the following:

    IV04607

  • APAR is sysrouted TO one or more of the following:

    LI76647

Fix information

  • Fixed component name

    XL MASS LIB COM

  • Fixed component ID

    5724X1602

Applicable component levels

  • R610 PSY

       UP



Document information

More support for: XL Fortran for Linux

Software version: 610

Reference #: LI76358

Modified date: 28 October 2011