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Status Delivered
Workspace Fault Analyzer for z/OS
Created by Guest
Created on May 6, 2014

RELATED IDEAS

Add Threadsafety to IBM Fault Analyzer

The Fault Analyzer product has a couple programs that are definied as Quasirentrant in CICS. Of particular note is that the XEIIN exit examines every EXEC CICS statement, incurring overhead when activated. Making FA threadsafe, particularly around the XEIIN exit, would allow for reduced overhead and minimize the number of TCB switches when monitoring for storage overlays (the purpose of the XEIIN exit).

Idea priority Medium
  • Guest
    Reply
    |     Nov 19, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Development Tooling
    Product - IBM Fault Analyzer

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Enterprise Tooling
    Product - IBM Fault Analyzer

  • Guest
    Reply
    |     May 8, 2014

    Hello,

    Although the sample definitions for the IDIXCExx programs have CONCURRENCY(QUASIRENT) they are Threadsafe and hence if required can be defined as such.  I have included a trace snippet below which shows a task running on a L8 TCB and the call to the IDIXCE68 program at the XEIIN GLUE does not cause a TCB switch.  

     00101 L8005 AP 00E1 EIP   EXIT  GETMAIN               OK                          00F4,00
     00101 L8005 AP 00E1 EIP   ENTRY LINK                                              0004,1A
     00101 L8005 AP D500 UEH   EVENT LINK-TO-USER-EXIT-PROGRAM IDIXCE68 AT EXIT POINT XEIIN  
     00101 L8005 AP D501 UEH   EVENT RETURN-FROM-USER-EXIT-PROGRAM IDIXCE68 WITH RETURN CODE 0
     00101 L8005 PG 1101 PGLE  ENTRY LINK_EXEC             STGVIO,NO,NO                      
     00101 L8005 DD 0301 DDLO  ENTRY LOCATE                1743DED0,19287D74,PPT,STGVIO      

    I will put a request in to add a comment to the FA users guide to say that these programs can be defined/run in ThreadSafe mode.

    Regards

    Adrian Simcock

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