Klein, Kenneth E wrote:
What is the general opinion out there on what portion of CPU cycles should be spent in supervisor state? Is more than 50% a "bad thing"? Could having a logical processor to physical processor ratio of greater than 2 (e.g. 8 logicals in a 3 CP cec) be "bad"?
I don't have an opinion, but I will observe that not all the time spent in supervisor state is overhead. A number of services used by the programs you use will run partly or entirely in supervisor state; in other words, a lot of that time can be productive work, and it should not be regarded as being only OS housekeeping. (How much of it is productive? It depends on your workloads.)
-- John Eells z/OS Technical Marketing IBM Poughkeepsie ee...@us.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
