dos33fsprogs/asoft_presenter/presenter_demo/slide_12_rapl_works

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2012-05-11 03:59:02 +00:00
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%c%How RAPL Works
* RAPL is not an analog power meter
* RAPL uses a software power model,
running on a helper controller
on the main chip package
* Energy is estimated using various
hardware performance counters,
temperature, leakage models and I/O
* The model is used for CPU throttling
and turbo-boost, but the values are
also exposed to users via a
model-specific register (MSR)