This is the Ross 154 release, which is a major upgrade of prmon.

Highlight Changes

A logging infrastructure has been introduced, using the spdlog backend. Logging can be adjusted globally or on a per-monitor basis
using the --level argument (#190)
Monitored values that are known to be monotonic increasing are now protected from race conditions that might cause them to drop in
value (#196) (this relies in a major reworking of how values are stored internally to prmon)
Unit tests are introduced to check that monitors behave correctly when faced with unexpected readings from the system (e.g., monotonic value decreases) (#197), this relies on the GoogleTest framework
Tests are also introduced to ensure that all expected monitored values are present in the text and JSON output files (#205)
Python2 support is dropped in all supporting scripts
A script to compress prmon's output files is now properly shipped in the release (prmon_compress_output.py) (#207)

Added logging functionality (spdlog) by @quantum-shift in #190
Fix: cpumon doesn't reset values each iteration by @quantum-shift in #194
Added command line switches to control logging level of monitors by @quantum-shift in #193
Integrate GoogleTest framework for unit tests by @quantum-shift in #197
Added new montored value class by @graeme-a-stewart in #196
Precooked tests for monitors by @quantum-shift in #195
Relocated benchmark.cpp to package/benchmarks by @quantum-shift in #198
Fixed netmon initialisation bug #199 by @quantum-shift in #200
Drop python2 support and remove u18 from the supported platforms by @amete in #203
Update Python scripts to Python3 by @graeme-a-stewart in #204
Fix wallclock units by @graeme-a-stewart in #206
Add tests against missing fields in prmon txt and json outputs by @quantum-shift in #205
Start installing prmon_compress_output.py by default by @amete in #207

Full Changelog: v2.2.1...v3.0.0

Two more assets are added:

v3.0.0.tar.gz containing the source code including spdlog,
prmon_3.0.0_aarch64-static-gnu85-opt.tar.gz containing the static build on aarch64.