Charles How many "It depends.." answers do you want? :-)
If all the program does is increment a register in a tight loop then I would imagine that your assumption would be roughly OK. If it does anything more "complicated" (eg open a dataset, maybe call a system routine, DB2 subsystem, XCF service, attach a subtask, etc etc), then there are so many things can affect it. Rob Scott Lead Developer Rocket Software 77 Fourth Avenue . Suite 100 . Waltham . MA 02451-1468 . USA Tel: +1.781.684.2305 Email: rsc...@rs.com Web: www.rocketsoftware.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Charles Mills Sent: 17 July 2012 14:53 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Help with elementary CPU speed question I have gotten dragged into a CPU performance question; a field I know little about. I run a test on a 2094-722. It is rated at 19778 SU/Second. The job consumes .146 CPU seconds total. I run the same job on a 2064-2C3. It is rated at 13378 SU/Second. All other things being roughly equal, should I expect that the job will consume 1.48 (19778/13378) times as much CPU time, or .216 CPU seconds? Is my logic right, or am I off somewhere? I'm not worried about a millisecond or two; just the broad strokes. Thanks, Charles ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
