Using Scaphandre 1.0.0 on Windows 10

[skonet]

Hello,

I installed Scaphandre 1.0.0 on my laptop with Windows 10. My CPU is Intel Core i7-10610U @1.8GHz (Skylake).
It is really a good initiative to have made RAPL usable from Windows!
I started to play around and tried to understand metrics collected.

Here are some remarks / questions I noticed, note that I may have missed or misunderstood some aspects ;-)

1 - Windows sensor: when launching scaphandre with no sensor specified, I get some metrics. I tried to understand which sensors are available on Windows (found no option to list them). From documentation, I thought it was "msr_rapl" but testing it failed. Finally I had to read source code to discover the Windows "msr" sensor. Is that the default one used when specifying no sensor in command line?

2 - Power metrics: it is not clear to me if power metrics are instantaneous values or averaged values for the time interval specified. For instance, using "scaphandre stdout -t 60 -s 5", are displayed power metrics instant values or averaged values for the 5-second interval?

3 - Host power metric: 'host' is not clear to me; should be the full system, so host power should be higher than socket0 package power. However, in my tests, host powers are always lower than socket0 package powers. Example:

Host:   2.560504 W from powercap_rapl_psys
        package         dram            core            uncore
Socket0 4.103986 W |    0.90218 W       ------

4 - Core (PP0) power metric: i never get any value for this one (example above), why? Same question for uncore (PP1), but I understood it may depend on my CPU model.

5 - Raw metrics: scaph_process_power_consumption_microwatts has wrong comment ("Total data read on disk by the process, in bytes"). Same question as before: instant value or averaged value?

6 - Raw metrics: metrics *_energy_microjoules look like cumulative metrics, is that right?

Regards,
Stéphane.