Sorry. MSUs are *incredibly* important to some (most?) customers. They are a major buy/no-buy decider. I cannot ship z900 code and shrug my shoulders about performance on a z13. IBM (as an example) has come to realize that customers are not willing to run S/390 instruction set COBOL executables on a z13 -- witness the Binary Optimizer. I get paid to be concerned about this stuff and I take the responsibility to live my life in a way that avoids ulcers. Shipping the source is utterly out of the question, both for intellectual property reasons and because at more and more customers even coding a Rexx script is beyond the local programming abilities: they could never compile the code successfully -- and many are so busy (understaffed?) they would not be willing to take the time even if they could.
At some sites we process millions of events per day per LPAR. A millisecond per event is thousands of CPU seconds per day. > let the responsibility lie with the customer Customers basically pay us to take that responsibility. > you will always get an 0C1 if you execute the instruction on a machine that is incapable of executing that instruction No argument there! <g> Seriously, thanks for your input. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Ed Gould Sent: Sunday, November 29, 2015 4:22 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Straightforward way to determine hardware architecture level? Charles, I have been watching this thread and if I am not mistaken you want to know which instructions are available (or not) at execution time. I am not knowledgeable of c/c++ but unless you compile the program at run time (with the correct arch type) you will always get an 0C1 if you execute the instruction on a machine that is incapable of executing that instruction. I would suggest that you compile at the lowest level and therefore should run on all types of the machine. If you are concerned about "efficiency" there is no real answer and you are exercising a way to get a medical condition(ulcer). Tell your boss to either ship the source and compile it whenever the machine type changes (make the customer do it). OR just ship at the lowest architected of the Z models or let the customer do it. We are probably talking about a few CPU seconds or there unless this is a MAJOR usage animal. Then I would suggest let the responsibility lie with the customer. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
