IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> wrote on 04/29/2013 11:06:34 AM:
> From: Paul Gilmartin <paulgboul...@aim.com> > Has the z nowadays any memory protection mode that forbids fetching > instructions from data storage? (Many other processors have such.) they have different caches which makes for almost the same effect on performance. And I remember recently reading a post on one of these lists which implied that if there is a line in one cache which is needed by the other cache, changes must be stored back to main before the line can be fetched. ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
