Application of PC's and Linux to the CDF Run II level-3 trigger
For Run II, the CDF Level-3 trigger must provide a sustained input bandwidth of at least 45 MBytes/set and will require processing power of at least 45000 MIPS to perform the necessary reconstruction and filtering of events. We present a distributed, scalable architecture using commod- ity hardware running the Linux operating system. I/O and CPU intensive functions are separated into two types of nodes; converter nodes receive event fragments via ATM from Level 2 computers and distribute complete events to processor nodes via multiple fast ethernets. We present re- sults from a small-scale prototype roughly equivalent to a 1/16th vertical slice of the final system. With this hardware we have demonstrated the capability of sustained I/O rates of 15 MBytes/set, more then three times the required baseline performance. We discuss PC hardware and Linux software issues and modifications for real time performance.
- Research Organization:
- Fermi National Accelerator Laboratory, Batavia, IL
- Sponsoring Organization:
- USDOE Office of Science (SC)
- OSTI ID:
- 2283
- Report Number(s):
- FERMILAB-Conf-98/359; ON: DE00002283
- 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
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