2667	 Execution Characteristics of Programs in a Page-on-Demand System	 Data are presented which show the execution characteristics of two types of commonly used programs in a large-scale time-shared computer system. A software monitoring facility built into the supervisor was used for data collection during normal system operation. These data were analyzed and results of this analysis are presented for a Fortran compiler and an interactive line file editor. Probability distribution functions and other data are given for such things as CPU intervals I O intervals and the number of such intervals during execution. Empirical distributions are compared with simple theoretical distributions exponential hyperexponential and geometric . Other data show paging characteristics of tasks as a function of the number of pages those tasks have in core. program behavior virtual memory paging demand paging software monitor program execution characteristics compiler execution behavior editor execution behavior
