Chen, J. BradleyEustace, Alan2017-11-031995Chen, J. Bradley and Alan Eustace. 1995. Kernel instrumentation tools and techniques. Harvard Computer Science Group Technical Report TR-26-95.http://nrs.harvard.edu/urn-3:HUL.InstRepos:34325482Atom is a powerful platform for the implementation of profiling, debugging and simulation tools. Kernel support in ATOM makes it possible to implement similar tools for the Digital UNIX kernel. We describe four non-trivial Atom kernel tools which demonstrate the support provided in Atom for kernel work as well as the range of application of Atom kernel tools. We go on to discuss some techniques that are generally useful when using Atom with the kernel. Prior techniques restrict kernel measurements to the domain of exotic systems research. We hope Atom technology will make kernel instrumentation and measurement practical for a much larger community of researchers.en-USResearch Paper or Report2017-11-03