PM73486: GBLX LOOKUP PERFORMANCE ENHANCEMENT

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as unreproducible in next release.

Error description

  • Internally raised APAR - internal story tracking number 49917.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of HLASM for z/OS, z/VM and z/VSE. *
    ****************************************************************
    * PROBLEM DESCRIPTION: Performance improvement for global SET  *
    *                      symbol lookups.                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Global SET symbols, i.e. macro symbols defined by the GBLA,
    GBLB and GBLC HLASM instructions may be referenced by different
    macros and in open code in contrast to local SET symbols, i.e.
    macro symbols defined by the LCLA, LCLB and LCLC HLASM
    instructions.  For users of large numbers of global SET
    symbols, the assembler processing may take a disproportionately
    long time.
    

Problem conclusion

Temporary fix

Comments

  • Performance of the HLASM logic for looking up global SET symbols
    has been improved, resulting in reduced assembly times for
    programs using large numbers of global SET symbols.
    

APAR Information

  • APAR number

    PM73486

  • Reported component name

    HLASM MVS, VM &

  • Reported component ID

    569623400

  • Reported release

    160

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-09-24

  • Closed date

    2012-10-12

  • Last modified date

    2013-04-23

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

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

    UK82593 UK82595 UK82594

Modules/Macros

  • ASMAINFO ASMA0C   ASMA1A   ASMA1I   ASMA1K
    ASMA1L   ASMA1P   ASMA1R   ASMA1S   ASMA1T   ASMA1U   ASMA1V
    ASMA1W   ASMA1X   ASMA1Y   ASMA1Z   ASMA11   ASMA15   ASMA9Z
    ASMA93
    

Fix information

  • Fixed component name

    HLASM MVS, VM &

  • Fixed component ID

    569623400

Applicable component levels

  • R160 PSY UK82594

       UP12/10/19 P F210

  • R360 PSY UK82593

       UP12/10/18 P 1210

  • R689 PSY UK82595

       UP12/10/18 P E512

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

160

Operating system(s):

z/OS

Reference #:

PM73486

Modified date:

2013-04-23

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