Controlling Operating Voltage Of A Processor

A non-transitory machine-readable medium having stored thereon instructions, which if performed by a machine cause the machine to perform a method comprising:

• receiving, in a power controller of a processor, a performance state change request to increase a performance state of a first core;
• communicating an operating voltage increase request to a first voltage regulator coupled to the processor to request the first voltage regulator to increase an operating voltage provided to the processor from a first voltage level to an interim voltage level;
• and
• after the operating voltage reaches the interim voltage level, enabling a second core of the processor to exit from an inactive state to an active state before enabling the first core to effect an operating frequency increase.

A system comprising:

• a multicore processor including:
• a plurality of cores;
• one or more graphics processing units;
• a power control unit to cause an operating voltage to be updated, according to a multi-level operating voltage ramp profile, to a second level sufficient to support at least one core at a turbo mode frequency;
• a coherent fabric to coupled to the plurality of cores and the one or more graphics processing units;
• a non-coherent fabric coupled to the coherent fabric;
• and
• one or more devices to couple to the non-coherent fabric;
• a voltage regulator coupled to the multicore processor to provide the operating voltage to the multicore processor;
• wherein the power control unit is to send a plurality of requests to the voltage regulator to cause the voltage regulator to update the operating voltage to the second level according to the multi-level operating voltage ramp profile;
• and
• a dynamic random access memory (DRAM) coupled to the multicore processor.