Collaborative power sharing between computing devices

A system for managing power at a datacenter, comprising:

• a power management point to manage a total power budget shared by a plurality of server operating systems, wherein the total power budget includes an available power budget of power not assigned to the plurality of server operating systems;
• and
• the plurality of server operating systems each communicatively coupled to the power management point, each server operating system configured to operate within a power budget assigned by the power management point,
• the power management point configured:
• to approve an additional power request having a power increase amount from a first server operating system of the plurality of server operating systems when the first server operating system has priority over a second server operating system of the plurality of server operating systems, wherein the power increase amount is more than the available power budget by an over-budget amount;
• to tell the second server operating system to decrease its power budget by the over-budget amount;
• and
• to decrease the available power budget by the power increase amount.

A method, comprising:

• determining, by a power management point, if a request to increase a first power budget by a power increase amount exceeds an available power budget,
• the first power budget for a first power consumer,
• the first power budget associated with a virtual machine environment,
• the virtual machine environment comprising at least two virtual machines,
• the at least two virtual machines supported by a hypervisor,
• the power management point managing a total power budget, the total power budget including two or more allocated power budgets and the available power budget,
• the available power budget not including the allocated power budgets;
• and
• when the request does not exceed the available power budget,
• approving the increase to the first power budget.