osjitter | Measure how much the OS interrupts programs

osjitter is a C library. osjitter has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This repository contains OSjitter, Pingpong and ptp-clock-offset. OSjitter is a tool for measuring how much the operating system interrupts programs. Such interruptions increase the latency of a program while the variation in latency is called jitter. This tool can be used to quickly measure a lower bound for the latency of a given system configuration. Note that the OS jitter depends on the kind of load a real-time program is applying to a system. Thus, one still needs to execute a domain specific test-suite to the real-time program of interest after a tool like OSjitter shows good results. The Pingong utility measures the overhead of several thread notification mechanisms such as spinning on a atomic variable (with/without pauses), POSIX condition variables, semaphores, pipes and raw Linux futexes. The ptp-clock-offset utility is a small program for checking the availability of different PTP offset ioctls and how they perform. Rule of thumb: using any PTP offset ioctl is better than having to use clock_gettime() and smaller delays are better. 2019, Georg Sauthoff mail@gms.tf, GPLv3+.