Doubtful. But then they are already discounting 20% to start. Software MSUs vs. Hardware Capability.
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Eric Bielefeld Sent: Tuesday, February 05, 2008 SYSN 12:49 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: CPU time differences for the same job This topic really got my attention when Norman said below that the processor may slow down when it gets too hot! I notice he said MAY. Is this proven? How much is the difference in speed? .1%, 10%? If your system slowed down by 10% for an hour, would IBM give you a rebate? Eric ---- "Norman Hollander on h-WiZ.biz" <[EMAIL PROTECTED]> wrote: > There have been several discussion at SHARE (in the EXCP project) over the > past couple of years on just this topic. The variability of CPU time has > been > seen up to 20-30% different from run to run. The hardware itself may be > part of > the issue. The processors (from z990s to z9s) may slow down when they get > too hot, > and depending on which instructions are being executed and if the data has > been fetched at the same time, the cycle time for the instructions can be > very different. -- Eric Bielefeld Systems Programmer Aviva USA Des Moines, Iowa 515-645-5153 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
