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IJ16682: URH-END-IO-HANDLER CONSUMING CPU WITH FLASHCACHE NOT CONFIGURED APPLIES TO AIX 7200-04

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APAR status

  • Closed as program error.

Error description

  • Flashcache thread URH-END-IO-Handler which is expected
to remain idle when flashcache is not configured,
consumes
CPU sometimes. This can be observed by running
performance
monitoring tool.

Local fix

  • 



Problem summary


    

  • When Flashcache is not configured, URH-END-IO-Handler thread
when receives some signal, it consumes CPU in spin.

    



Problem conclusion


    

  • Code fixed to avoid the CPU consumption

    



Temporary fix


    

  • 



Comments


    

  • 7100-05 - use AIX APAR IJ16802
7200-04 - use AIX APAR IJ16682

    



APAR Information




    

  • APAR number
    IJ16682
    • 

  • Reported component name
    AIX V7.2
    • 

  • Reported component ID
    5765CD200
    • 

  • Reported release
    720
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2019-06-07
    • 

  • Closed date
    2019-06-07
    • 

  • Last modified date
    2020-02-13
    • 





    

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

    
IJ14231
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.2
    • 

  • Fixed component ID
    5765CD200
    • 



Applicable component levels


    

  • R720  PSY  U881824
       UP19/10/31  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            27 March 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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