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This paper presents lessons learned when developing and implementing a simulator for Ericsson's Connectivity Packet Platform, the basis for most Ericsson 3G systems. CPP is a heterogeneous cluster with more than 20 types of processor boards with 1-5 MLOC of code running on each board, and several processors per board. The simulator, called the CPP Emulator(More)
Capacity in telecommunication systems is highly related to operator revenue. As a vendor of such systems, Ericsson AB is continuously improving its processes for estimating, specifying, tuning, and testing the capacity of delivered systems. In order to systematize process improvements Ericsson AB and Linköping University joined forces to create an(More)
Testing a distributed system is difficult. Good testing depends on both skill and understanding the system under test. We have developed a method to observe the system at the CORBA remote-procedure-call level and then use dynamic-query-based visualization to refine and improve the test cases. The method and accompanying tools have been tested and refined by(More)
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