Measuring End-to-End Bandwidth with Iperf using Web100.

Tirumala, A. ; Cottrell, L. ; Dunigan, T.

Technical Information Center Oak Ridge Tennessee

关键词: Bandwidths;    Network bandwidth;    Time;    Estimates;    Network traffic;   

RP-ID  :  DE2003813039

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

End-to-end bandwidth estimation tools like Iperf though fairly accurate are intrusive. In this paper, we describe how with an instrumented TCP stack (Web100), we can estimate the end-to-end bandwidth accurately, while consuming significantly less network bandwidth and time. We modified Iperf to use Web100 to detect the end of slow-start and estimate the end-to-end bandwidth by measuring the amount of data sent for a short period (1 second) after the slow-start, when the TCP throughput is relatively stable. We obtained bandwidth estimates differing by less than 10% when compared to running Iperf for 20 seconds, and savings in bandwidth estimation time of up to 94% and savings in network traffic of up to 92%.