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Performance impacts of look-ahead execution in the conversation scheme

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2 Author(s)
Kim, K.H. ; Dept. of Electr. Eng., California Univ., Irvine, CA, USA ; Yang, S.M.

The look-ahead execution approach, which allows participant processes that exist early to exit from a conversation before other participants finish their conversation activities, is presented here as a fundamental approach to reducing the synchronization overhead. Queuing network models are developed for both the system operating under the basic conversation execution scheme and the system operating under the look-ahead execution scheme. Based on the models, various performance indicators such as the system throughput, the average number of processors idling inside a conversation due to the synchronization required, and the average time spent in conversation, are evaluated numerically for different application environments. The performance under the look-ahead execution scheme is compared with that under the basic conversation execution scheme. The results provide insights into the extent of benefits provided by the look-ahead execution approach

Published in:

Computers, IEEE Transactions on  (Volume:38 ,  Issue: 8 )