This is one area where I really have a problem. It used to be back in the 370 days that if a machine was rated at 50 mips and you moved up to 100 mips you really noticed the difference in execution time. Today if you have a 100 mip machine (I know they're rated at msu's not mips) and you moved up to a dual with 160 mips you might be cutting your own throat. They may give you 2 processors each rated at 80 mips for a total of 160 mips. If your workload is such that it can't take advantage of dual processors then you have just dropped down to an 80 mip machine when you used to have a 100 mip machine. I know I'm on a rant, but it happened to up and we were being pressured by the vendor to go to the dual processor and that we would be very happy. We weren't. (end of rant)
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Charles Mills Sent: Tuesday, July 17, 2012 8:53 AM To: [email protected] 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 [email protected] with the message: INFO IBM-MAIN ========================== This email, and any files transmitted with it, is confidential and intended solely for the use of the individual or entity to which it is addressed. If you have received this email in error, please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this message by mistake and delete this e-mail from your system. If you are not the intended recipient, you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
