> Date: Tue, 11 Apr 2017 11:39:53 -0700 >From: Ed Jaffe <[email protected]> >Subject: Re: CPU Timerons/Seconds vs Wall-clock Time
>On 4/9/2017 8:48 AM, Lindy Mayfield wrote: >> For example, if an MVS job ran and consumed 10 CPU seconds (SMF 30 I think), >> can I assume that it at least took 10 seconds of elapsed time to run? >Not unless you're 100% certain there was no multitasking and nothing was >redirected to a specialty engine. >Edward E Jaffe Good point Edward. If they use the default (shipped in SAMPLIB) IEFACTRT the CPU time reported is the time on CP plus the time on zIIP multiplied by the zIIP speed normalization factor (SMF30SNF). On a sub-capacity model the reported CPU time can be many times the elapsed. G. Tom Russell “Stay calm. Be brave. Wait for the signs” — Jasper FriendlyBear “… and remember to leave good news alone.” — Gracie HeavyHand ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
