I have no idea how to change the COBOL source code to accomplish my suggestion. Assuming there is no easy way, then if the module has a patch area, he can zap the load module with the necessary changes. Then test the change for an improvement in performance. If there is an improvement, he can complain to whatever vendor supplied him with his COBOL compiler.
Bill Fairchild Software Developer Rocket Software 275 Grove Street * Newton, MA 02466-2272 * USA Tel: +1.617.614.4503 * Mobile: +1.508.341.1715 Email: [email protected] Web: www.rocketsoftware.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Joel Wolpert Sent: Friday, August 07, 2009 4:41 PM To: [email protected] Subject: Re: z10 and overlapping/destructive moves Since he is trying to tune a COBOL program how would he accomplish this. ----- Original Message ----- From: "Bill Fairchild" <[email protected]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Friday, August 07, 2009 5:31 PM Subject: Re: z10 and overlapping/destructive moves > It certainly can't hurt to change the MVI/MVC to a single instruction: > MVC 254(3,120),=120c' ' > And, if possible, align the 120c' ' on at least a double word boundary. > > Bill Fairchild ---------------------------------------------------------------------- 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
