Correlation maps can be used in two ways. First, they can be used as an aid for performance tuning, Second, they can be used to estimate the impact on communication requirements of reconfiguring running applications through thread migration. Thread migration provides a way of tuning applications for which sharing information is not known a priori, and a means of adapting to dynamic algorithms or environments.

We show that i) accurate thread affinities can be obtained without multiple rounds of migration, ii) thread affinities lead to good approximations of application communication requirements, iii) simple heuristics can use thread affinities to efficiently approximate optimal mappings of threads to nodes, and iv) good placement is essential for high performance.

@inProceedings{thitikamol-icdcs99,
	title = "Active Correlation Tracking",
	author = "Kritchal Thitikamol and Pete Keleher",
	booktitle = {The 19th International Conference on Distributed Computing Systems (ICDCS)},
	month = {June},
	year = {1999},
}