Electron: A power budget manager

To Do:

• Create metrics for each task launched [Time to schedule, run time, power used]
• Have calibration phase?
• Add ability to use constraints
• Running average calculations https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
• Make parameters corresponding to each scheduler configurable (possible to have a config template for each scheduler?)
• TODO : Adding type of scheduler to be used, to be picked from a config file, along with it's configurable parameters.
• Write test code for each scheduler (This should be after the design change)
• Some of the constants in constants/constants.go can vary based on the environment.
  Possible to setup the constants at runtime based on the environment?
• Log fix for declining offer -- different reason when insufficient resources as compared to when there are no longer any tasks to schedule.
• Have a centralised logFile that can be filtered by identifier. All electron logs should go into this file.
• Make def.Task an interface for further modularization and flexibility.
• Convert def#WattsToConsider(...) to be a receiver of def.Task and change the name of it to Watts(...).
• Have a generic sorter for task resources instead of having one for each kind of resource.
• Critical -- Add software requirements to the README.md (Mesos version, RAPL version, PCP version, Go version...)
• Retrofit to use Go 1.8 sorting techniques. Use def/taskUtils.go for reference.
• Retrofit TopHeavy and BottomHeavy schedulers to use the clustering utility for tasks.

Requires Performance Co-Pilot tool pmdumptext to be installed on the machine on which electron is launched for logging to work and PCP collector agents installed on the Mesos Agents

How to run (Use the --help option to get information about other command-line options):

./electron -workload <workload json>

To run electron with ignoreWatts, run the following command,

./electron -workload <workload json> -ignoreWatts

Workload schema:

[
   {
      "name": "minife",
      "cpu": 3.0,
      "ram": 4096,
      "watts": 50,
      "image": "gouravr/minife:v5",
      "cmd": "cd src && mpirun -np 1 miniFE.x -nx 100 -ny 100 -nz 100",
      "inst": 9,
      "class_to_watts" : {
          "A": 30.2475289996,
          "B": 35.6491229228,
          "C": 24.0476734352
       }

   },
   {
      "name": "dgemm",
      "cpu": 3.0,
      "ram": 4096,
      "watts": 50,
      "image": "gouravr/dgemm:v2",
      "cmd": "/./mt-dgemm 1024",
      "inst": 9,
      "class_to_watts" : {
          "A": 35.2475289996,
          "B": 25.6491229228,
          "C": 29.0476734352
       }
   }
]