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A study of high-performance communication mechanism for multicomputer systems

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7 Author(s)
Murayama, H. ; Inf. Syt. R&D Div., Hitachi Ltd., Japan ; Yoshizawa, A. ; Aimoto, T. ; Inouchi, H.
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Based on our analysis of the behavior of standard UNIX communication software, we propose a new communication mechanism which reduces the software overhead. This mechanism is optimized to be used in business applications, such as those of online transaction processing and database management. These applications are currently designed to operate in multiple concurrent processes, thus requiring multiprocessing environments with virtual addressing. The proposed communication mechanism, named DLA (dynamic link allocation), supports direct data transfer communication between processors without any intermediate data copying operations. The DLA mechanism adopts a synchronous non-blocking interface which can be used directly by user processes. Since the DLA mechanism provides address translation for each communication port, the sender may directly specify the virtual address of the receiver's buffer area. With the DLA mechanism, sender and receiver CPU usages are reduced to one-third of those for TCP/IP communication, while attaining 30% higher throughput

Published in:

Parallel Processing Symposium, 1996., Proceedings of IPPS '96, The 10th International

Date of Conference:

15-19 Apr 1996

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