IBM Support

IV80560: SLOWDOWN ENCODING CHARACTERS INTO EBCDIC CODE PAGE 1388

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.
Execution speed drops relative to Java 8 SR1 in a workload that
makes heavy use of character conversion into EBCDIC code page
1388.

Local fix

  • 



Problem summary


    

  • The JIT compiler applied a fine grain optimization as part of
its loop optimizing strategies. In this case, for overall method
performance, it decreased it more than it increased it.

    



Problem conclusion


    

  • The JIT compiler has been modified to avoid applying this
optimization in this case.
.
This APAR will be fixed in the following Java Releases:
   8    SR2 FP10  (8.0.2.10)
.
Contact your IBM Product's Service Team for these Service
Refreshes and Fix Packs.
For those running stand-alone, information about the available
Service Refreshes and Fix Packs can be found at:
           https://www.ibm.com/developerworks/java/jdk/

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV80560
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    130
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2016-01-19
    • 

  • Closed date
    2016-01-19
    • 

  • Last modified date
    2016-01-19
    • 





    

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

    • 

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

    • 



Fix information


    

  • Fixed component name
    JIT
    • 

  • Fixed component ID
    620700124
    • 



Applicable component levels


    

  • R130  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            19 January 2016
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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