This change adds 4 new CPU related metrics:
* process_mperf_total
* processor_rtc_total
* processor_utility_total
* processor_privileged_utility_total
and renames the existing process_performance to
processor_performance_total, since it was previously misunderstood and
was unlikely to be have been useful without the above new metrics
The data sources for these are not particularly well understood, and the
examples show that in some cases, arbitrary scaling factors are required
to actually make them useful, but in my testing on hundreds of systems
with a broad range of CPUs and operating systems from 2012r2 through to
2019 has proved out that we can use them to accurately display actual
CPU frequencies and CPU utilisation as it is represented in taskmgr.
Things I don't particularly like and would like input on:
* I would have preferred to do the scaling of processor_mperf_total in
the code, but there isn't an elegant way of doing this right now.
* Maybe processor_mperf_total should be called
processor_mperformance_total.
See #787 for discussion.
Signed-off-by: Steffen Higel <higels@valvesoftware.com>
