Operating System Based Performance Monitoring of Programs

摘要

An operating provides a facility within its kernel for monitoring program performance. The facility may monitor user level programs as well as portions of the operating system, such as the kernel. The facility counts instructions and/or function calls to provide a useful performance metric to a user of the system. The count is forwarded to a user level monitoring program. The inclusion of the facility within the kernel enhances the speed of performance monitoring and enables the operating system to be directly monitored by the facility.