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Linux Networking, Tracing and IO Visor, a New Systems Performance Tool for a Distributed World

The most important factor for ease of use and flexibility is the ability to dynamically trace the kernel and userspace applications at specific probe points. Dynamic tracing serves two purposes: First, the probes can be inserted as required, and second, we can remove/disable the probes when we are done with the analysis. Thus we can precisely control the overhead of the tracing tool on the system.