Abstract: An apparatus and method for managing a frequency of a computer processor. The apparatus includes a power control unit (PCU) to manage power in a computer processor. The PCU includes a data collection module to obtain transaction rate data from a plurality of communication ports in the computer processor and a frequency control logic module coupled to the data collection module, the frequency control logic to calculate a minimum processor interconnect frequency for the plurality of communication ports to handle traffic without significant added latency and to override the processor interconnect frequency to meet the calculated minimum processor interconnect frequency.

Abstract: Methods and apparatus relating to directory based coherency to improve input/output write bandwidth in scalable systems are described. In one embodiment, a first agent receives a request to write data from a second agent via a link and logic causes the first agent to write the directory state to an Input/Output Directory Cache (IODC) of the first agent. Additionally, the logic causes the second agent to send data from a modified state to an exclusive state using write back to the first agent, while allowing the data to remain cached exclusively in the second agent and also enabling the deallocation of the IODC entry in the first agent. Other embodiments are also disclosed.

Abstract: An apparatus and method for managing a frequency of a computer processor. The apparatus includes a power control unit (PCU) to manage power in a computer processor. The PCU includes a data collection module to obtain transaction rate data from a plurality of communication ports in the computer processor and a frequency control logic module coupled to the data collection module, the frequency control logic to calculate a minimum processor interconnect frequency for the plurality of communication ports to handle traffic without significant added latency and to override the processor interconnect frequency to meet the calculated minimum processor interconnect frequency.