用户层通讯工业标准VIA的设计思想与工作机制  

The Priciples and Mechanism of an Industrial Standard of User-Level Networking:VIA

作　　者：刘昊飞[1] 李朝阳[1] 都志辉[1] 马群生[1] 

机构地区：[1]清华大学计算机系高性能研究所,北京100084

出　　处：《计算机科学》2001年第10期13-18,共6页Computer Science

基　　金：THVIA为国家"九八五"计划

摘　　要：SAN(System Area Network)within cluster brings high bandwidths and low latencies to IPC(Inter-Process Communication). However,the communication performance has not been able to makefull use of these hardware improvements due to many software overheads. To address this problem,In-tel Corporation,Compaq Computer Corporation, and Microsoft Corporation jointly authored the VIA (Virtual Interface Architecture)specification.As an industrial standard of ULN(User-Level Networking),Ⅵ Architecture defines a set of data operations for message passing, to achieve high-bandwidth, low-latency communication between any couple nodes within cluster ,as well as minimize CPU cycles. VIA gives direct access to network inter-face,bypasses operating system in memory region protected mode ,avoid copies of data during message passing ,and avoid interrupts and context switches if possible.This article describes the principles and mechanism of the Ⅵ Architecture and THVIA.SAN(System Area Network)within cluster brings high bandwidths and low latencies to IPC (Inter-Process Communication). However,the communication performance has not been able to make full use of these hardware improvements due to many software overheads. To address this problem,Intel Corporation,Compaq Computer Corporation, and Microsoft Corporation jointly authored the VIA (Virtual Interface Architecture)specification. As an industrial standard of ULN (User-Level Net working), VI Architecture defines a set of data operations for message passing, to achieve high-bandwidth, low-latency communication between any couple nodes within cluster,as well as minimize CPU cycles. VIA gives direct access to network interface, bypasses operating system in memory region protected mode,avoid copies of data during message passing,and avoid interrupts and context switches if possible. This article describes the principles and mechanism of the VI Architecture and THVIA.

关 键 词：通讯协议 用户层通讯工业标准 VIA 流量模型 计算机网络 

分 类 号：TN915.04[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]