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Nettimer: A Tool for Measuring Bottleneck Link Bandwidth
Measuring the bottleneck link bandwidth along a path is important for understanding the performance of many Internet applications. Existing tools to measure bottleneck bandwidth are relatively slow, can only measure bandwidth in one direction, and/or actively send probe packets. We present the nettimer bottleneck link bandwidth measurement tool, the libdpcap distributed packet capture library, and experiments quantifying their utility. We test nettimer across a variety of bottleneck network technologies ranging from 19.2Kb/s to 100Mb/s, wired and wireless, symmetric and asymmetric bandwidth, across local area and cross-country paths, while using both one and two packet capture hosts. In most cases, nettimer has an error of less than 10%, but at worst has an error of 40%, even on cross-country paths of 17 or more hops. It converges within 10KB of the first large packet arrival while consuming less than 7% of the network traffic being measured.
author = {Kevin Lai and Mary Baker},
title = {Nettimer: A Tool for Measuring Bottleneck Link Bandwidth},
booktitle = {3rd USENIX Symposium on Internet Technologies and Systems (USITS 01)},
year = {2001},
address = {San Francisco, CA},
url = {https://www.usenix.org/conference/usits-01/nettimer-tool-measuring-bottleneck-link-bandwidth},
publisher = {USENIX Association},
month = mar
}
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