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

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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
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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