Title :
Performance aspects of switched SCI systems
Author :
Liebhart, Manfred
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
The Scalable Coherent Interface (SCI) defines a high-speed interconnect that provides a coherent distributed shared memory system. With the use of switches separate rings can be connected to form large topology-independent configurations. It has been realized that congestion in SCI systems generates additional retry traffic which reduces the available communication bandwidth. This paper investigates additional flow control mechanisms for overloaded switches. They are based on a supplementary retry delay and show a significant throughput gain. Furthermore two different management schemes for the output buffers are investigated. Computer simulations are used to compare the models and to determine system parameters
Keywords :
distributed memory systems; multiprocessor interconnection networks; performance evaluation; shared memory systems; system buses; telecommunication congestion control; Computer simulations; coherent distributed shared memory system; congestion control; flow control mechanisms; high-speed interconnect; management schemes; output buffers; performance aspects; retry traffic; scalable coherent interface; switched SCI systems; system parameters; topology-independent configurations; Bandwidth; Channel allocation; Communication switching; Communication system control; Communication system traffic control; Delay; Informatics; Protocols; Switches; Traffic control;
Conference_Titel :
High Performance Distributed Computing, 1997. Proceedings. The Sixth IEEE International Symposium on
Conference_Location :
Portland, OR
Print_ISBN :
0-8186-8117-9
DOI :
10.1109/HPDC.1997.626408
