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IV12259: JAVA JIT - POSSIBLE PERFORMANCE REGRESSION IN ARRAY COPY

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.
Problem in LinuxPPC 32/64 only, customer may observe a higher
fluctuation in performance on test cases that performs array
copy

Local fix

  • N/A.

Problem summary

  • The problem is caused by the build compiler for LinuxPPC 32/64
bit misinterpreting a simplified version of an assembly
instruction.

Problem conclusion

  • This defect will be fixed in:
6.0.0 SR10
6.0.1 SR2
7.0.0 SR1
.
The JIT compiler is updated by replacing the offending assembly
instruction to the full form, allowing the build compiler to
produce the correct code.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV12259
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    600
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-12-17
    • 

  • Closed date
    2011-12-17
    • 

  • Last modified date
    2011-12-17
    • 





    

  • 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


    

  • R600  PSY
       UP
    • 

  • R260  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSC9HBA","label":"Just In Time (JIT) Compiler"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            17 December 2011
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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