bhoughto@pima.intel.com (Blair P. Houghton) (01/02/91)
In article <1991Jan1.144134.18631@agate.berkeley.edu> shipley@remarque.berkeley.edu (Pete Shipley) writes: >In article <1990Dec30.004638.12910@oswego.Oswego.EDU> faex0000@penelope.Oswego.EDU (Brian (BJT) Talamo) writes: >Yes, WHAT WIZARDS!!!!! > >What do you want us to write about? How about "priority calculations I have seen." The only two for which I've seen the formulae have been those in Bach's and Leffler's books, and they don't describe accurately the priority schemes on any UNIX-alike I've used, including Ultrix, Umax, SunOS, Aegis/Domain-OS, and whatever it's called on SGI's Iris workstations. Most importantly, the "nice-value" (p_nice, set using nice(1) or renice(8)) has so very little weight in the actual priority after a very few seconds of CPU time in vanilla SysV or BSD (see Bach or Leffler to see what I mean) that it's almost useless as a prioritizing measure. Are other Unix variants' priority calculations more heeding of the "nice-value"? --Blair "What was it worth and when was it worth that?"