The Use of Microcode Instrumentation for Development, Debugging and Tuning of Operating System Kernels

@inproceedings{Melvin1988TheUO,
  title={The Use of Microcode Instrumentation for Development, Debugging and Tuning of Operating System Kernels},
  author={Stephen W. Melvin and Yale N. Patt},
  booktitle={SIGMETRICS},
  year={1988}
}
We have developed a tool based on microcode modifications to a VAX 8600 which allows a wide variety of operating system measurements to be taken with minimal perturbation and without the need to modify any operating system software. A trace of interrupts, exceptions, system calls and context switches is generated as a side-effect to normal execution. In this paper we describe the tool we have developed and present some results we have gathered under both UNIX 4.3 BSD and VAX/VMS V4.5. We… CONTINUE READING