I would hope that if implemented, both the PSW-key storage access check and the extended storage key access check would be performed in parallel, thereby eliminating any additional storage access cycles.
John P Baker Software Engineer -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Leonard Woren Sent: Thursday, September 29, 2005 14:24 To: [email protected] Subject: Re: Instruction Set Enhancement Idea Nobody has commented on the potential performance hit of the proposed extended storage key lookup. As described, it looks to me like it would add a few cycles to storage accesses which are currently (I assume) 1 cycle. Maybe that's why those other architectures require so much more compute power to accomplish the same workload? /Leonard ---------------------------------------------------------------------- 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
