Com Detective: A Lightweight Communication Detection Tool for Threads

Inter-thread communication is a vital performance indicator in shared-memory systems. Prior works on identifying inter-thread communication employed hardware simulators or binary instrumentation and suffered from inaccuracy or high overheads-both space and time-making them impractical for production use. We propose COMDETECTIVE, which produces communication matrices that are accurate and introduces low runtime and low memory overheads, thus making it practical for production use.