On high-precision measurement of network performance in grid environments

In this paper we present our approach of a distributed environment for high-precision and high bitrate network measurements. These measurements can be performed on a standard PC system without changes in the kernel of the operating system. Unique features of our system are support of measurements in a distributed manner as well as using different packet sampling models for measurement data flows. In addition, bounds of measurement accuracy on non real-time operation systems as well as a proof of concept are drawn. The shown measurement approach is essentially suited for estimating quality of Grid and realtime multimedia applications in the Internet.