SUBJECT:         APAR  NUMBER: PK06942
 
REFERENCE:  AREA:     TPFDF RECOUP ROUTINES
            SEGMENT:  BRCG13     - RELEASE:  TPFDF (Assembler)
 
 
Pre-requisite APARs are (TPF only) :
FOR SEGMENT BRCG13     (Assembler) - REL TPFDF
      PN44448 PN63945 PQ00810 PQ42097 PQ74483 PQ75887 PQ94935
 PQ80726  PK15966  
To be applied in the order listed for each segment.
 

ABSTRACT OF PROBLEM
___________________
A  CTL-10  system  error from segment BRCG may occur while TPFDF
recoup is updating statistics.

COMMENTS ON PROBLEM
___________________
BRCG uses a lock mechanism with a CS  instruction  in  order  to
control  the  multiple  ECBs  that need to update the statistics
fields.  If the lock is not released  a  CTL-10  will  occur  in
those ECBs that are waiting for the lock.
 

SOLUTION
________
The  lock mechanism in BRCG is enhanced to check if we are close
to a CTL-10 dump (less than 20ms left). A DLAYC is  then  issued
and the wait loop continues. If we get close to the CTL-10 limit
again,  a  new informational dump is issued (OPR-141300) and the
lock is forced.   This additional check  is  done  only  for  VM
systems.   TPF 4.1 APAR PJ30791 must be installed before or con-
currently with this APAR.
 

DEPENDENCIES
____________
 
Related Segments Affected By This APAR.
_______________________________________
 
Segments to be assembled or compiled:
 
Segments to be link edited:
 
Load Modules to be loaded:
 
Migration Considerations
========================
    None
 
-- END APAR PK06942
 
 
 

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