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IV58687: NETWORK PERFORMANCE DEGRADATION ON FC5899 (AUSTIN) ADAPTER APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • A network performance degradation occurs on FC5899
    adapter.
    
    The problem is that missing interrupts occur for
    receiving
    packets.
    The delay becomes more than 100msec for each packet and
    retransmissions occur.
    The packets remain in the adapter, and they are handled
    when another interrupt for another packet is raised.
    

Local fix

Problem summary

  • A network performance degradation occurs on FC5899
    adapter.
    
    The problem is that missing interrupts occur for
    receiving packets.  The delay becomes more than 100msec for
    each packet and retransmissions occur.
    The packets remain in the adapter, and they are handled
    when another interrupt for another packet is raised.
    

Problem conclusion

  • Code changed so that additional interrupt is generated by
    adapter whenever there are packets to be processed by the host.
    
    Introduced a new PdAt ODM attrbite named "gen_intr".
    This attribute is set to "no" by default. This attribute needs
    to be set to "yes" using chdev command to unlock the solution
    to this problem. It is not recommended to enable the attribute
    if the problem symptom is not observed.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV58709
    6100-08 - use AIX APAR IV58647
    6100-09 - use AIX APAR IV58470
    6100-09 - use AIX APAR IV58470
    6100-09 - use AIX APAR IV58470
    7100-01 - use AIX APAR IV55757
    7100-02 - use AIX APAR IV58698
    7100-03 - use AIX APAR IV58687
    7100-04 - use AIX APAR IV58611
    

APAR Information

  • APAR number

    IV58687

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-04-03

  • Closed date

    2014-04-03

  • Last modified date

    2016-05-10

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

    IV55757

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

    U866432

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U866432

       UP14/05/22 I 1000



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV58687

Modified date: 10 May 2016