CPU
Characteristics
| Name | Unit | Default value | Description | Example |
|---|---|---|---|---|
| units | None | 1 | CPU quantity | 2 |
| usage | None | See Usage | See usage | .. |
| core_units | None | 24 | Number of core on one CPU | 12 |
| die_size | cm2 | None | Size of the die | 2900 |
| manufacturer | None | Intel | Name of the CPU manufacturer | AMD |
| die_size_per_core | cm2 | 0.245 | Size of the die divided by the number of core | 0.245 |
| model_range | None | Xeon Platinum | Name of the cpu range or brand | i7 |
| family | None | Skylake | Name of the architectural family (Generation) | Naple |
| name | None | None | Complete commercial name of the CPU | Intel Core i7-1065 |
| TDP | Watt | None | Thermal Design Point | 250 |
Complete
The following variables can be completed
die_size_per_core and core_units
if die_size and core_units are given :
Otherwise, if family or/and core_units are given, die_size_per_core can be retrieved from a fuzzy matching on our cpu repository.
If several cpu matches the given family and/or core_units the maximizing value is given (in terms of impacts).
If no cpu is found either because the cpu is unknown or not enough data have been given by the user the default data are used.
model_range and family
if name is given, model_range and family can be retrieved from a fuzzy matching on our cpu name repository.
Manufacture impact
For one CPU the manufacture impact is:
with:
| Constant | Units | Value |
|---|---|---|
| \(\text{CPU}_\text{manufacture_die}^{\text{gwp}}\) | kgCO2eq/cm2 | 1.97 |
| \(\text{CPU}_\text{manufacture_die}^{\text{adp}}\) | kgSbeq/cm2 | 5.80E-07 |
| \(\text{CPU}_\text{manufacture_die}^{\text{pe}}\) | MJ/cm2 | 26.50 |
| \(\text{CPU}_\text{manufacture_base}^{\text{gwp}}\) | kgCO2eq | 9.14 |
| \(\text{CPU}_\text{manufacture_base}^{\text{adp}}\) | kgSbeq | 2.04E-02 |
| \(\text{CPU}_\text{manufacture_base}^{\text{pe}}\) | MJ | 156.00 |
Note: If there are more than 1 CPU we multiply \(\text{CPU}_\text{manufacture}^\text{criteria}\) by the number of CPU given in units.
Usage impact
Both power consumption and consumption profile are implemented.
Consumption profile
The CPU consumption profile is of the form : consumption_profile(workload) = a*ln(b+(workload*c))+d
Determining the parameters
From model range
If model_range is given or is completed from the cpu_name, we use the averaged parameter for the specific model range.
| manufacturer | model_range | a | b | c | d |
|---|---|---|---|---|---|
| Intel | xeon platinum | 342.3624349628362 | 0.034750819765533035 | 36.89522616719806 | -16.402219089443307 |
| Intel | xeon gold | 71.13767381183924 | 0.2280562153242743 | 9.66939980437224 | 6.266004455550223 |
| Intel | xeon silver | 41.55884200277906 | 0.2805828410398358 | 8.424085900547572 | 4.764407035404158 |
| Intel | xeon e5 | 97.83350026272564 | 0.10296318761911205 | 15.726228837967518 | -1.8588498922070307 |
| Intel | xeon e3 | 342.3624349628362 | 0.034750819765533035 | 36.89522616719806 | -16.402219089443307 |
| Intel | xeon e | 55.65014194649273 | 0.04666041377084888 | 20.41458697644834 | 4.243652609400892 |
By default, we use the consumption profile of Intel Xeon Platinum
Model adaptation from punctual measurement
In case punctual power measurement (load;power_consumption) are given by a user, we adapt the selected consumption profile to match the given point.
Model adaptation from TDP
If the TDP is given we use the average power consumption per unit of TDP (given by TEADS) multiplied by the given TDP as power measurement and compute a model adaptation as describe above.
| 0% | 10% | 50% | 100% |
|---|---|---|---|
| 0.12 | 0.32 | 0.75 | 1.02 |
| Average power consumption per unit of TDP |