HMC 10.3.1060.0 introduces a new environmental dashboard to view the sustainability metrics of a system. This panel is similar to the Performance and Capacity Monitoring (PCM) functionality, so the panels look similar to those of PCM panels. They can be launched from anywhere PCM can be launched from. A menu to launch the environmental dashboard is usually found next to the launch PCM menu.

 Note: For High end systems, you need FW level 1030.20 for Power10 and FW level 950.80 for the Power9 as the minimum required versions for the system to be capable of energy monitoring. Energy monitoring capability is available in earlier firmware levels for scale-out and mid-range systems.

Current usage details:

The current usage details display the average consumption data over the last five minutes. This data automatically refreshes every five minutes if the panel is left open. The refresh button can be used to refresh the data manually.

Metrics: 

Power usage: It shows the average power consumption over the last five minutes.

Core usage (%): It shows the percentage of utilized proc units in total configurable proc units.

Carbon footprint: Carbon footprint is calculated from the power reading in the HMC. Calculation details are discussed in detail below.

Energy mode: Energy mode is the power-saving mode available in the HMC. Changing the energy mode setting at the HMC level affects the power and temperature readings.

Inlet temperature: The inlet temperature indicates the heat that is generated at the power inlet.

Trends: 

The trends display the historical trend of the above metrics. The default view displays data for the last 4 hours. This can be changed to view metrics up to last year. The graph is a dual-axis line graph where power consumption is plotted on the left axis and the metric on the right axis can be changed using the right axis dropdown.

The right axis drop-down consists of all the above metrics, in addition, it provides the option of selecting the unit of inlet air temperature between Celsius and Fahrenheit.

The two fields above the graph display the energy consumption and carbon emissions over the selected period. (i.e. last four hours in the default view). 

The carbon emissions dropdown above the graph provides an option to switch between units of carbon emissions. This unit change would be applied to the carbon footprint metric in the graph as well.

Carbon footprint computation:

The carbon footprint is calculated using below formula.

Carbon Footprint(gm/hr) = Power Consumption(watts) * [Power Usage Effectiveness(PUE) * Carbon Intensity (g/Wh)]

Power usage effectiveness and carbon intensity are constants and can vary depending on the data center and region. By default, the values are 1.5 and 0.25g/Wh respectively. These values can be changed using HMC CLI command chpcm.

chpcm command: 

chpcm command can be used to change the values of PUE and carbon intensity as below. 

chpcm -o s -t energy -a "pue=2,carbon_intensity=0.5"

Please note that the chpcm command always accepts carbon intensity in g/Wh unit.

lspcm command: 

lspcm command can be used to list the values of PUE and carbon intensity. 

lspcm -t energy

The carbon intensity value listed would be in g/Wh unit.

Export:

The export panel can be used to download the historical metrics data in either Json format or csv format.

In Summary, the new environmental dashboard provides a simplified experience to view the power usage, thermal metrics and carbon footprint and ability to export data for sustainability metrics reporting. 

Partition level sustainability metrics:

HMC 10.1.1110.0 version introduces an enhanced version of environmental dashboard which includes sustainability metrics on a partition level and also provides historical data for the power mode. 

Power mode: 

The tooltip inn the graph now includes the power saving mode set in the HMC allowing users to co-relate changes in environmental metrics with changes in power mode set during that time frame. 

Partition level metrics: 

The table below the graph lists all the partitions and vios with their corresponding environmental metrics. 

Power usage trends : Power usage trend of the partition for the selected period of time. The time frame picked for the graph would be applicable to this trend as well. 

OS type : OS type of the partition. 

Current energy usage (watt-hour) : Total energy usage of the partition for the past 5 minutes. 

Total energy usage (watt-hour) : Total energy usage of the partition for the selected time frame. By default this would be last 4 hours.

Current carbon footprint (gms CO2e/hr) :  Average Carbon foot print over the last 5 minutes. 

Total carbon emissions(gms CO2e) : Total carbon emissions for the selected time frame, by default, the last 4 hours. 

Computation :

To compute the partition level power usage, the system level power usage is split among all the partitions proportionate to their respective core usage. So the formula would be as below. 

Power usage of partition = (total power * utilized proc units of partition)/(system level utilized proc units).

The rest of the metrics use the same computation formulae as mentioned above but using the partition level power usage. 

In Summary, HMC 1110 version environmental dashboard provides users with more granular data by adding the partition level metrics and also enables users to co-relate the sustainability metrics with any change of power mode.

Contacting the PowerVM Team

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