User Program Measurement in a Time-Shared Environment A general discussion of the measurement of software systems is followed by a description of a hardware and software scheme for measuring user programs in a time-shared environment. The TX-2 computer at MIT Lincoln Laboratory was used for the implementation of such a system and the characteristics of this implementation are reported. A scenario showing the system in use is presented. Finally, it is shown how other time-sharing systems may provide similar measuring facilities. CACM October, 1971 Nemeth, A. G. Rovner, P. D. operating systems, multiprogramming systems, time-sharing systems, software measurement, user program measurement, measurement technology, TX-2 computer, virtual computers, performance improvement 4.30 4.32 4.42 4.43 CA711005 JB February 2, 1978 1:05 PM 1957 4 2151 2151 4 2151 2151 4 2151 2151 4 2151 2318 4 2151 3103 4 2151 3148 4 2151 1653 5 2151 1747 5 2151 1860 5 2151 2151 5 2151 2151 5 2151 2151 5 2151 2719 5 2151 2967 5 2151 1626 6 2151 210 6 2151 2151 6 2151 2151 6 2151 2167 6 2151 2210 6 2151 2645 6 2151 2657 6 2151