> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Lizette Koehler > Sent: Thursday, July 16, 2009 3:28 PM > To: IBM-MAIN@bama.ua.edu > Subject: Offload work to zIIP with zPRIME > > I have a concern about the zPRIME product. If the zXXP > engines are for SRB (pre-emptible) work, then my > understanding is that the SRB cannot have any SVCs save for > OPEN. So I am wondering how the process could work when > normal TCB work would have SVCs it executes. Is there a way > to determine that this UOW has no SVC so therefore I can make > it look like an SRB and have it move the zXXP engine? Or can > I blindly move a UOW to the zXXP engine and if it has an SVC > - fail, and then the system would dispatch back to the CP? > > > Am I missing something here? > > Lizette
zAAP engines are for Java work. Java runs under a TCB, not an SRB. I don't know much of anything about what the actual engine differences are. I know that a general CP is a "superset" of a zIIP and a zAAP. But what are the actual microcode differences? Perhaps the SVC FLIH or SLIH has a "hook" which causes the work to be redispatched on a CP when an SVC is done. But, then, what about a PC instruction which invokes a supervisor service? There just is not enough public documentation to know. That is another reason why I would not "bet" on zPRIME. I don't doubt is works right now. But a little "tweaking" by IBM, and POOF it doesn't (maybe). -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell john.mck...@healthmarkets.com * 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
