Predictive power capping and power allocation to computing nodes in a rack-based information handling system

An information handling system (IHS) comprising:

• one or more blocks, the blocks having at least one block controller and each of the blocks having one or more functional components including one or more processing nodes, the block controllers each controlling block-level operations of the processing nodes within a corresponding block;
• a rack-level management controller having a processor and a memory coupled to the processor, the rack-level management controller communicatively coupled to the block controllers and the processing nodes via the block controllers;
• a power subsystem communicatively coupled to the rack-level management controller and providing power distribution to a plurality of the functional component of the IHS;
• a plurality of power supply units (PSU) each capable of providing a pre-determinable amount of power for use by the components of the IHS and each coupled to and controlled by a power controller;
• and
• the rack-level management controller having firmware executing thereon to enable rack level predictive power allocation in a rack-configured IHS, wherein the firmware configures the rack-level management controller to:
• receive a plurality of node-level power-usage data and settings from a plurality of block controllers, including a current power consumption and an initial power budget, for each processing node within the IHS, wherein the processing nodes are arranged within blocks, each having a block controller that handles block-level power allocation and control for processing nodes within a corresponding block, wherein the rack-level management controller is communicatively coupled to each block controller, and each block controller is communicatively coupled to each processing node with a corresponding block;
• generate a power consumption profile based on the power-usage data for each of the processing nodes;
• identify a total available system power from all power modules supplying power to the IHS;
• determine a system power cap for the IHS based on the power consumption profiles and the total available system power;
• determine a current power budget for each of the processing nodes based on an analysis of at least one of the power consumption profile, the initial power budget, the current power consumption, the system power cap, and the total available system power;
• trigger the power subsystem of the IHS to regulate an amount of power budgeted and supplied to each of the processing nodes of the IHS based on the power consumption profiles and the system power cap;
• and
• in response to a failure of one or more of the PSUs reducing a total amount of the available power to below the system power cap, automatically reduce the system power cap and concurrently reduce one or more allocated power budgets based on an analysis of historical usage per processing node and other factors, wherein to automatically reduce the system power cap in response to a failure of one or more of the PSUs, the rack-level management controller:
• triggers generation of a signal on a global throttle wire allocated within each Ethernet cable directly connecting each of the block controllers within the IHS with an infrastructure manager (IM), wherein the IM is also communicatively connected to the management controller via another Ethernet cable having a global throttle wire, the global throttle wire being at least one wire in each Ethernet cable that is assigned to provide communication of a global throttle power reduction (GTPR) signal from the rack-level management controller to the IM controller and from the IM controller to each block controller, wherein the block controllers within the IHS are pre-programmed to respond to an assertion of the GTPR signal on the global throttle wire by immediately reducing the current power consumption of one or more processing nodes within a respective block being controlled by the block controller.