deamon help

[Bart Sears]

Anyone who is interested in the various problems one can run into
using statistical timing and ways to get around some of the problems of
statistical timing  might want to take a look at the proceedings of
last year's USENIX Mach workshop.  David Black presented a paper on
"The Mach Timing Facility: An Implementation of Accurate Low-Overhead
Usage Timing" where he described a timing facility using timestamps
instead of statistical timing.  While it was implemented in Mach, it
was not really tied to any Mach features and would probably be fairly
easy to implement in any flavor of Unix.  This facility would take
care of the problem Chris Torek pointed out where under many current
systems it is possible to write a program which uses 80+% of the
system yet is charged for 0% CPU usage.

					Bart Sears
					sears at hplabs.hpl.hp.com