Title :
Fast preprocessing of physical data in a VMEbus based multiprocessor system
Author :
Brehmer, W. ; Maier, K.H. ; Martini, M. ; Richter, A. ; Unger, Ch ; Wawer, W.
Author_Institution :
Hahn-Meitner-Inst. Berlin GmbH, West Germany
fDate :
2/1/1989 12:00:00 AM
Abstract :
Multicoincidence and multiparameter experiments in nuclear physics typically produce 10 Gb of data per measuring run. These raw data are stored on optical disks and subsequently reduced by a VMEbus-based multiprocessor system which compiles large two-dimensional spectra in a 32 Mb of RAM (random access memory). All subprocesses required for preprocessing run simultaneously on firmly assigned microprocessors (MC 68020). The sorting algorithms for spectrum compilation can easily be adapted to different raw data structures and spectrum sizes by means of a set of assembler macros. The authors describe the data recording, system requirements, interprocess communication, sorting process, software development, and system performance
Keywords :
data acquisition; multiprocessing programs; multiprocessing systems; physics computing; sorting; storage management; 32 MB; MC 68020; RAM; VMEbus based multiprocessor system; assembler macros; data recording; interprocess communication; performance; software development; sorting algorithms; sorting process; spectrum compilation; system requirements; Assembly; Data structures; Microprocessors; Multiprocessing systems; Nuclear measurements; Nuclear physics; Programming; Random access memory; Read-write memory; Sorting;
Journal_Title :
Nuclear Science, IEEE Transactions on
