Charles Mills wrote: > You could write a subroutine to loop for one CPU second. That would fulfill > the letter of the request below. Looping was how one implemented delays on > single-processing small computers. > > It would not be a career-enhancing technique to use under z/OS.
but it was one of the common things way back when ... especially with lots of the polling stuff. it would really hit badly when you migrated a single application processing environment into a virtual machine guest. there were all sorts of hacks developed to try and apply processing loop compensation. another looping scenario that use to be quite prevalent were things TIO-loops on SM+BUSY status ... that preiodically would run away. i've frequently asserted that one of the issues that gave rise to slow-start windows for tcp delay/congestion compensation was the primitive state of timer primitives on many of the platforms (that were either inadeqaute and/or too expensive for doing rate-based implementation). sort of as part of hsdt http://www.garlic.com/~lynn/subnetwork.html#hsdt we had done some high-speed backbone ... that included rate-based management for combination of delay & congestion management ... running in the internal network http://www.garlic.com/~lynn/subnetwork.html#internalnet the internal network had been larger than the internnet/arpanet from just about the beginning (of both) until possibly mid-85. http://www.garlic.com/~lynn/subnetwork.html#internet one of the issues was that we weren't allowed to bid on the original NSFNET backbone http://www.garlic.com/~lynn/internet.htm#0 aka ... the great 1/1/83 switchover was a technology change to internetworking protocol ... but it was the NSFNET backbone that provided the internworking backbone between different networks ... that possibly represents the actual operational birth of the modern internet. minor references http://www.garlic.com/~lynn/2002k.html#12 NSFNET Program Announcement http://www.garlic.com/~lynn/2000e.html#10 NSFNET Award Announcement< random past postings mentioning rate-based pacing http://www.garlic.com/~lynn/94.html#22 CP spooling & programming technology http://www.garlic.com/~lynn/2000b.html#11 "Mainframe" Usage http://www.garlic.com/~lynn/2001h.html#44 Wired News :The Grid: The Next-Gen Internet? http://www.garlic.com/~lynn/2002i.html#45 CDC6600 - just how powerful a machine was it? http://www.garlic.com/~lynn/2002i.html#57 CDC6600 - just how powerful a machine was it? http://www.garlic.com/~lynn/2002k.html#56 Moore law http://www.garlic.com/~lynn/2002p.html#28 Western Union data communications? http://www.garlic.com/~lynn/2002p.html#31 Western Union data communications? http://www.garlic.com/~lynn/2003.html#55 Cluster and I/O Interconnect: Infiniband, PCI-Express, Gibat http://www.garlic.com/~lynn/2003b.html#44 filesystem structure, was tape format (long post) http://www.garlic.com/~lynn/2003g.html#54 Rewrite TCP/IP http://www.garlic.com/~lynn/2003g.html#64 UT200 (CDC RJE) Software for TOPS-10? http://www.garlic.com/~lynn/2003j.html#1 FAST - Shame On You Caltech!!! http://www.garlic.com/~lynn/2003j.html#19 tcp time out for idle sessions http://www.garlic.com/~lynn/2003j.html#46 Fast TCP http://www.garlic.com/~lynn/2004f.html#37 Why doesn't Infiniband supports RDMA multicast http://www.garlic.com/~lynn/2004k.html#8 FAST TCP makes dialup faster than broadband? http://www.garlic.com/~lynn/2004k.html#12 FAST TCP makes dialup faster than broadband? http://www.garlic.com/~lynn/2004k.html#13 FAST TCP makes dialup faster than broadband? http://www.garlic.com/~lynn/2004k.html#16 FAST TCP makes dialup faster than broadband? http://www.garlic.com/~lynn/2004k.html#29 CDC STAR-100 http://www.garlic.com/~lynn/2004n.html#35 Shipwrecks http://www.garlic.com/~lynn/2004o.html#62 360 longevity, was RISCs too close to hardware? http://www.garlic.com/~lynn/2004q.html#3 [Lit.] Buffer overruns http://www.garlic.com/~lynn/2004q.html#57 high speed network, cross-over from sci.crypt http://www.garlic.com/~lynn/2005d.html#6 [Lit.] Buffer overruns http://www.garlic.com/~lynn/2005g.html#4 Successful remote AES key extraction ---------------------------------------------------------------------- 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
