The U of Zero (*grin*) hasn't charged back for more than 2.5 decades. I still saw account numbers in job cards when I started back then but expect it was hold-over from the card/batch-only days and habit from the lifers that ran the system. Given our expected un-plug in the next year, the PTB are not likely to entertain the notion either.
I do recall, as a student, that my CMS account had a monthly limit (5 CPU minutes?) but I joined the (priviledged) HelpDesk crowd and could compute to my heart's content. [pause] I see that IBM was granted a patent for this very subject last October. Reading only the abstract, it might be difficult to shoehorn zIIPs into the process since, " The logical core is run on the single physical core on an exclusive basis for a period of time, such that the logical threads of the logical core execute on physical threads of the single physical core." That text would seem to preclude processor switches or remove the true concept of multi-threading. (If all my threads have to run on a single CP, don't I become singly threaded?) Like I said, I didn't read (much) below the abstract. Interesting topic. http://www.google.com/patents/US20150277984 Publication number US20150277984 A1 Publication type Application Application number US 14/231,794 Publication date Oct 1, 2015 Filing date Apr 1, 2014 Priority date Apr 1, 2014 [snip] --------> signature = 8 lines follows <-------- Neil Duffee, Joe Sysprog, uOttawa, Ottawa, Ont, Canada telephone:1 613 562 5800 x4585 fax:1 613 562 5161 mailto:NDuffee of uOttawa.ca http:/ /aix1.uOttawa.ca/ ~nduffee “How *do* you plan for something like that?” Guardian Bob, Reboot “For every action, there is an equal and opposite criticism.” “Systems Programming: Guilty, until proven innocent” John Norgauer 2004 "Schrodinger's backup: The condition of any backup is unknown until a restore is attempted." John McKown 2015 -----Original Message----- From: Pew, Curtis G [mailto:[email protected]] Sent: March 7, 2016 12:40 Subject: Does everybody use chargeback? I’d wondered why SMT is turned off for CPs on the new z13 and z13s. I learned at SHARE that it’s because CPU timing can’t be done as accurately when using SMT, and since that could affect chargeback it’s not allowed. This is interesting, because we’ve never done chargeback here at UT. I was wondering how unusual this makes us. (I know we’re unusual in lots of ways, but I hadn’t thought much about chargeback.) So just to satisfy my curiosity, how many of y’all don’t do chargeback? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
