IO03985: CCL ENGINE AT 100% WHEN MONITORING PHYSICAL NTRI LINES

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

  • CCL engive at 100% when monitoring physical NTRI lines
    

Local fix

  • Stop monotoring the physical NTRI lines
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: ALL NTRI using NPM collection on the NTRI    *
    *                 physical line                                *
    ****************************************************************
    * PROBLEM DESCRIPTION: CCL goes to 100% utilization when       *
    *                      doing NPM collection on a NTRI physcial *
    *                      line.                                   *
    ****************************************************************
    * RECOMMENDATION: Apply appropriate PTF.                       *
    ****************************************************************
    NCP issues a Read Error Log to the adapter when an NPM FORWARD
    is processed.  If NCP then wishes to transmit, it sees there
    is a command pending (Read Error Log), so it starts a Level 3
    PCI loop, waiting for the Read Error Log Interrupt from the
    adapter.
    
    This works ok for a real 3745 (even though the CCU is looping),
    because the TIC is another adapter.  In a CCL however, this
    can cause a problem because the looping CCU locks out the
    other thread that performs the TIC functions, so that the
    TIC is not able to present the interrupt in a timely manner.
    

Problem conclusion

  • Code was changed to no longer loop, but instead set an
    indicator that will be used to PCI the transmitter when
    an SCB CLEAR is processed by the NCP.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IO03985

  • Reported component name

    NCP V7

  • Reported component ID

    564806300

  • Reported release

    602

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2006-06-02

  • Closed date

    2006-06-02

  • Last modified date

    2012-01-31

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

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

    UO00266 UO00267 UO00268 UO00281 UO00288 UO00289 UO00299 UO00322
    UO00323 UO00350 IO04576

Modules/Macros

  • ECLML3   ECLMXMT  ECLXUA
    

Fix information

  • Fixed component name

    NCP V7

  • Fixed component ID

    564806300

Applicable component levels

  • R502 PSY UO00405

       UP06/07/06 P F607

  • R602 PSY UO00406

       UP06/07/06 P F607

  • R702 PSY UO00407

       UP06/07/06 P F607

  • R752 PSY UO00410

       UP06/06/30 P 0606

  • R756 PSY UO00411

       UP06/06/30 P 0606

  • R772 PSY UO00412

       UP06/06/30 P 0606

  • R781 PSY UO00413

       UP06/06/30 P 1201

  • R782 PSY UO00414

       UP06/06/30 I 1000

  • R802 PSY UO00408

       UP06/07/06 P F607

  • R812 PSY UO00409

       UP06/07/06 P F607

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:

IBM X.25 Over TCP/IP for Communication Controller for Linux
All

Software version:

602

Reference #:

IO03985

Modified date:

2012-01-31

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