At this shop, using CPU costs money. Using I/O doesn't. Wall clock doesn't. Therefore, so long as SLAs are met, it is better to decrease CPU time at the expense of __anything__ else. Yes, even productivity. I must say no more.
-- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM > -----Original Message----- > From: IBM Mainframe Assembler List > [mailto:[email protected]] On Behalf Of robin > Sent: Monday, January 16, 2012 11:40 PM > To: [email protected] > Subject: Re: How good is the EX instruction? > > From: "McKown, John" <[email protected]> > Sent: Friday, 13 January 2012 2:32 AM > > > OK, I hope I'm not becoming wearisome with my yammering. > But I am not too busy right now. And I still really like and > > respect the z architecture (despite its horrendous price). > > > > I ask about the CPU cost of an EX because that same program > that I'm working on uses the EX a fair amount to move > > "variable length" strings into a blank-initialized area for > reporting purposes. Instead of EX of an MVC, I could use > > MVCL or MVCLE. > > As the task is to move stuff to a buffer for reporting purposes, > the cpu time will be negligible compared to I/O time. > > Confucius say: If it works, don't fix it. > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > >
