Looks like this app is using floating point judging by the library module names, hence the huge cpu time (XMU is fp multiply from my dim memory of 20 years ago). Converting to DFP in Cobol v5 will reduce cpu time dramatically.
On Wed, Nov 29, 2017 at 2:38 AM, Massimo Biancucci <[email protected]> wrote: > Hi everybody, > > in a customer shop we use IBM APA to trace some cpu-bound applications in > order to find out in which modules and statement applications use the most > of the cpu. > > For a particular job APA shows a big "SYSTEM" cpu usage on IGZXLPKA module > as you can see in the following data. > > Name Description Percent of CPU Time * 10.00% .0.6% > > > *....1....2....3....4....5....6....7... > SYSTEM System/OS Services 78.03 > ************************************** > > LERUNLIB Language Environment 77.88 > ************************************** > Runtime > > > IGZXLPKA COBOL 2 Module 77.88 > ************************************** > > IGZBXXMU COBOL 2 Module 31.51 **************** > > > IGZ@BCD COBOL 2 Module 12.76 ****** > > > IGZXFPW COBOL 2 Module 12.43 ****** > > > FPVDFPCX CSECT in IGZXLPKA 9.53 ***** > > > IGZ@CV COBOL 2 Module 6.17 *** > > > IGZXPR2 COBOL 2 Module 5.40 *** > > > IGZ@DSP COBOL 2 Module 0.02 > > > IGZXFCAL COBOL 2 Module 0.02 > > > IGZ@DCS2 COBOL 2 Module 0.01 > > > IGZXFCA4 COBOL 2 Module 0.00 > > > MVS MVS System 0.11 > > > SVC SVC Routines 0.03 > > > DB2 DB2 Subsystem 0.00 > > > > DB2SQL SQL Processing 12.13 ****** > > APPLCN Application Code 9.70 ***** > > NOSYMB No Module Name 0.11 > > > In such a shop applications are Cobol (main V4 moving to V5) and this case > is a DB2 batch applications. There're different programs involved > dynamically called (to prevent questions, the whole shop is the same and > only this job shows this behaviour). There's a mix between V4 and V5 in the > call chain. > > I was not able to find out lots of infos about the IGZXLPKA module but it's > manages dynamic call. > > I've tried with a different programs-chain (written to test the call up to > 5 level of nesting) but nothing similar happened. > > Any hint ? > > Thanks a lot in advance. > Massimo > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
