Windows performance modeling and data reduction using WatchTower and Argus, 
Michael W. Knop, Praveen K. Paritosh, Peter A. Dinda, and Jennifer M. Schopf, 
Technical Report NWU-CS-01-6, Department of Computer Science,
Northwestern University, 
June 2001 

We describe and evaluate WatchTower, a system that simplifies
the collection of Windows performance counter data, and Argus,
a statistical methodology for evaluating this data and reducing
the sheer volume of it. This is especially important when
monitoring the performance of clusters for high performance
computing.