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IV63117: AKE NETM OSTD HAS BUCKET SIZE TO BE FLEXIBLE. APPLIES TO AIX 7100-03

A fix is available

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APAR status

  • Closed as program error.

Error description

  • This is not a real defect.
    Currently When netmalloc error checklevel is set to 5 or above,
    OSTD is turned on, which will use a fixed size 11 hash size
    bucket.  If a machine has a lot of cpus and with heavy load,
    and OSTD is turned on, it will have performance impact.
    We are enhancing it by setting ostd hash bucket size based
    on the number of cpus running on the box at boot time.
    

Local fix

Problem summary

  • This is not a real defect.
    Currently When netmalloc error checklevel is set to 5 or above,
    OSTD is turned on, which will use a fixed size 11 hash size
    bucket.  If a machine has a lot of cpus and with heavy load,
    and OSTD is turned on, it will have performance impact.
    We are enhancing it by setting ostd hash bucket size based
    on the number of cpus running on the box at boot time.
    

Problem conclusion

  • At boot time, we set ostd hash bucket size to be
    max(11, number_of_cpu_running), of which 11 is the old
    default value.
    

Temporary fix

Comments

  • 6100-09 - use AIX APAR IV63114
    7100-03 - use AIX APAR IV63117
    

APAR Information

  • APAR number

    IV63117

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-07-31

  • Closed date

    2014-07-31

  • Last modified date

    2016-05-11

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

    IV63114

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

    U868053

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U868053

       UP14/10/29 I 1000

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Document Information

Modified date:
11 May 2016