Title :
A prototype DAQ system for the ALICE experiment based on SCI
Author :
Skaali, B. ; Ingebrigtsen, L. ; Polovnikov, S. ; Rohrig, H. ; Wormald, D.
Author_Institution :
Dept. of Phys., Oslo Univ., Norway
fDate :
8/1/1998 12:00:00 AM
Abstract :
A prototype DAQ system for the ALICE/PHOS beam test and commissioning program is presented. The system has been taking data since august ´97, and represents one of the first applications of the scalable coherent interface (SCI) as interconnect technology for an operational DAQ system. The front-end VMEbus address space is mapped directly from the DAQ computer memory space through SCI via PCI-SCI bridges. The DAQ computer is a commodity PC running the Linux operating system. The results of measurements of data transfer rate and latency for the PCI-SCI bridges in a PCVMEbus SCI-configuration are presented. An optical SCI link based on the Motorola Optobus I data link is described
Keywords :
data acquisition; high energy physics instrumentation computing; microcomputer applications; nuclear electronics; system buses; ALICE experiment; Linux operating system; Motorola Optobus I data link; PCI-SCI bridges; data transfer rate; front-end VMEbus address space; interconnect technology; optical SCI link; prototype DAQ system; scalable coherent interface; Application software; Bridges; Data acquisition; Delay; Linux; Physics; Prototypes; Space technology; Switches; System testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
