Homepage: https://01.org/msr-tools, https://github.com/01org/msr-tools
Open Source: yes
MSR Tools project provides utilities to access the processor MSRs and CPU ID directly.
This project is composed of three different user space console applications.
rdmsr – read MSR from any CPU or all CPUs wrmsr – write values to MSR on any CPU or all CPUs cpuid – show identification and feature information of any CPU
Who It’s For
This project is for system developers, testers, debuggers, and other contributors creating or customizing any device based on IA processor.
This is a small open source project distributed under the GPL v2 open source license. With a mature and established codebase containing about 700 lines of code begun in 2000 on zytor.com, it is now housed on 01.org. MSR Tools is written only in C.
Not sure how many people would use this/find this useful (other distros like ubuntu in fedora have it in their repos though). In my case I need it to workaround an annoying known issue related to the dell bios/intel pstate driver where my xps 13 can get stuck at minimum cpu frequency after resuming from suspend.