VIA-based (Bulk Synchronous Parallel) BSPLib vs. BSPLib

The Virtual Interface Architecture (VIA) is an abstract model of an user-level zero-copy network, and is the basis for InfiniBand, iWARP and RoCE. Created by Microsoft, Intel, and Compaq, the original VIA sought to standardize the interface for high-performance network technologies known as System Area Networks (SAN).

The VIA model of high-performance by simplifying protocol stacks and reducing kernel-copy overheads, can be also used to avoid bottlenecks caused by the communication overheads in Parallel clustering system.

Message (bytes)	VIA-based BSPLib		BSPLib
	bsp_get()	bsp_send()	bsp_get()	bsp_send()
1k	387	359	685	762
2k	506	476	825	903
4k	683	667	1033	1082
8k	1055	1108	1421	1377
16k	1776	1815	2224	2129
32k	3245	3231	3885	3716

The above table presents a comparison of time delay(us) of VIA-based and UDP/IP based BSPLib. VIA-based BSPLib shows the obvious better performance than the performance of UDP/IP based.