Specifications

Chapter 7
Conclusions and Future Work
The network tester was extended to an Internet environment. This implies IP traffic gen-
eration and global clock synchronization. The system can measure one-way latency, packet
loss, can build histograms. It can generate traffic according to the statistical distributions
of the fields of the packets and it can reach the Gigabit Ethernet line speed for all packet
sizes. The clock synchronization for one-way latency computation is achieved using the
GPS and CERN-designed clock cards.
The system will be used to evaluate the performance of long haul networks as part of a
feasibility study of locating the ATLAS third level trigger, the Event Filter, in remote
locations. Several tests were already done with the Institute of Nuclear Physics in Cracow
and others are about to follow.
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