BCL-3:A High Performance Basic Communication Protocol for Commodity Superserver DAWNING-3000

This paper introduces the design and implementation of BCL-3, ahigh performance low-level communication software running on a clusterof SMPs (CLUMPS) called DAWNING-3000. BCL-3 provides flexible andsufficient functionality to fulfill the communication requirements offundamental system software developed for DAWNING-3000 whileguaranteeing security, scalability, and reliability. Important featuresof BCL-3 are presented in the paper, including special support for SMPand heterogeneous network environment, semi-user-level communication,reliable and ordered data transfer and scalable flow control.The performance evaluation of BCL-3 over Myrinet is also given.