ATM based event building and PC based level 3 trigger at CDF
Baseline event building and Level 3 trigger processing at the CDF exper- iment at Fermilab is speci ed to process about 300 events/s with an average event size of about 150 KB. First, the event must be assembled from fragments originating from approximately 16 readout sources, with individual average fragment sizes ranging from 12 to 16 KB. Then the Level 3 processor-based trigger performs reconstruction and ltering tasks requiring in excess of 45000 MIPS of CPU power on the assembled events. We present a distributed, scalable architecture using commodity components: VME-based CPU modules for the readout, an ATM switch for event buildling, and Pentium-based PC's running Linux for event processing. Pentium-based PC's are also used for event distribution throughout and collection from the Level 3 processors via multiple 100 Mbps Ethernets. We report on preliminary studies conducted at CDF with a small-scale prototype. This architecture is also a possible candidate for the CMS experiment at LHC.
- Research Organization:
- Fermi National Accelerator Laboratory, Batavia, IL
- Sponsoring Organization:
- USDOE Office of Science (SC)
- OSTI ID:
- 2475
- Report Number(s):
- FERMILAB-Conf-98/348-E; ON: DE00002475
- Resource Relation:
- Conference: International Conference on Computing in High Energy Physics (CHEP '98), Chicago, Illinois, August 31 - September 4, 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Application of PC's and Linux to the CDF Run II level-3 trigger
CMS DAQ event builder based on Gigabit Ethernet