weavy-co2-emission-app

This application will calculate CO2 emission per process. Clone this repo then change into the repo's directory to play around.

Pre-requisites:

I am assuming you have Node.js 10 or higher installed. It should work for Node.js 8 but, alas, I haven't tested it.

Installation:

Clone the repo, cd into the directory, and run npm install. Now you are all set!

Basic usage

By default it works something like this:

$ node .

pid     cpu    electricity_usage_kw      co2_emission_lbs
1       0      0                         0
31912   3      0.0013499999999999999     0.0019574999999999996
32020   3.3    0.001485                  0.0021532499999999998

Output format

The app currently supports the following output formats: json for JSON, csv for CSV and term for basic terminal listing, similar to ps. By default the result is output in the basic terminal listing format. In order to specify the format you must pass the output option with one of the supported formats specified above.

For example, for JSON:

$ node . --output=json

For CSV:

$ node . --output=csv

And for basic terminal listing, which is redundant since it is the default anyway:

$ node . --output=term

Total CO2 emission

If you want the total CO2 emission data, you may specify the --total option:

$ node . --total

cpu                  electricity_usage_kw   co2_emission_lbs
42.400000000000006   0.019079999999999996   0.02766599999999999

Filtering out columns

If you want to select specific columns, you may want to use the --columns option and specify the comma-separated list of names of columns that interest you. Currently, the names of the supported columns are: pid, cpu, electricity_usage_kw and co2_emission_lbs.

For example:

$ node . --columns=pid,co2_emission_lbs

pid     co2_emission_lbs
15750   0.011484
8501    0.0025447499999999997
32020   0.0020879999999999996

Sorting

You may sort the columns in both the ascending and descending order. For example, to sort by the PID in the ascending order:

$ node . --sort-by=pid

To sort by the CO2 emission in the descending order:

$ node  --sort-by=co2_emission_lbs:desc

To sort by multiple columns:

$ node  --sort-by=pid:asc,co2_emission_lbs:desc

If you omit the order (asc or desc), it is assumed the ascending order is specified:

$ node  --sort-by=pid,co2_emission_lbs:desc