Agrrr.. Sorry for the misformatted mail. Trying again.


  
 I'm chasing another problem where an LE program (COBOL) gets into an endless, 
rather tight loop in CEEPLPKA after an S04E abend  I'm trying to understand the 
relation between I/O interrupt system trace entries, and a pair  of SSRV 
entries that very often follow the I/O entry.


Here is a sample sequence from the trace: 


0003 031C 009FEA30  DSP        00000000_0872C4B6  00000000 00000000 26C62364 
0003 031C 009FEA30  EXT   TIMR 00000000_0872BFAE  00001005 
0001 031C 009FEA30  DSP        00000000_0872BFAE  00000000 00000000 26C62364 
0001 031C 009FEA30  I/O  06B16 00000000_0872C2C8  00104007 745786C0 
0001 031C 009FEA30  SSRV   11F          9EE5C3D6  16701A80 80000000 157A25F8 
0001 031C 009FEA30  SSRV   150          02F5F020  00000000 7EB06940 00000000 


The program is dispatched (DSP), interrupted at end of time slice (EXT TIMR), 
dispatched again (DSP), then interrupted by an I/O which completed (I/O). Very 
often, two system service calls (SSRV), first for RELEASE (SSRV  115), second 
for DFSMS Media Manager ICYDIE (SSRV 150) are seen. 


First I thought the SSRVs are related to the program, but I now have my doubts. 
I'd rather think they are caused by I/O interrupt handling. Especially, since I 
have seen such sequences in another dumps, although much  less often. 


Can anyone say something about the nature of those SSRV calls. 
Am I safe to say they do not belong to the problem at hand? 


— 
Peter Hunkeler    

  

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