Use of real-time UNIX in data acquisition for HEP
Gustavo Ambrosini, C. Rondot, D Prigent, Giacomo Polesello, A Khodabandeh, R. W. L. Jones, R. Ferrari, P Ganev, F Tamburelli, Livio Mapelli, C. P. Bee, S. K. Hellman, G. Fumagalli, G. Mornacchi, S. Buono · CERN Document Server (European Organization for Nuclear Research) · 1992
OutputOur requirements for a real-time UNIX operating system are summarized in the following: 2.1 Requirements 2 Selection of a real•time UNIX system level triggers.if we wish to extend the scope of UND( towards applications which are time critical, i.e. high sitions are not generally a Hard Real Time applications, a degree of determinism can be of use (UNIX), data transport (VME bus) and networking (TCP/IP protocol).While HEP data acqui so we need an operating system that supports standard interfaces for an operating system in the overall data acquisition system as well as a high degree of platform independence, and UNIX is not suited for real-time applications.However, we would like to maintain uniformity Despite characteristics which have made it the most widely spread operating system, standardWe have chosen UNIX as the operating system for back-end processors in our of DAQ. its real-time features.a performance study of the selected operating system has been carried out, particularly for system features have been extensively tested against our requirements t10¤S2 dards and to reach a full platform independence.The evaluation has proceeded in two direc end processors, to asses their combined potential, to converge towards operating system stan tal is the investigation of the use of real-time UNIX operating system, in RISC-based frontThe R&D activity which we indicated in the proposal of our collaboration [4,5] as fundamen