Better RAM estimation

[LuisBlanche]

• Assess current method and limitations

• Research solutions for better measurement on different platforms
  Implement solutions and test them :

• Add RAPL support for RAM measures

• Add PowerMetrics support for RAM Measures

• Add solution (TBD) for Windows RAM Measures

• Formulate and implement calibration tests

[LuisBlanche]

See #439

[LuisBlanche]

#629

[benoit-cty]

See also #751

[benoit-cty]

Looking to better understand RAPL I find out a way to read DRAM consumption with RAPL : https://github.com/mlco2/codecarbon/blob/use-cpu-load/examples/intel_rapl_show.py

It doesn't work with every CPU supported by RAPL, only some of them.

On a multi-CPU computer there is two DRAM counter despite memory is shared accros the two CPU, so we need to investigate what it mean.

Here is the output with a dual Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz:

Domain 'intel-rapl:1/package-1' as a power consumption of 7.33 Watts
Domain 'intel-rapl:0:0/dram' as a power consumption of 1.19 Watts
Domain 'intel-rapl:0/package-0' as a power consumption of 8.72 Watts
Domain 'intel-rapl:1:0/dram' as a power consumption of 1.23 Watts

Useful doc : https://hubblo-org.github.io/scaphandre-documentation/explanations/rapl-domains.html