REDUCED WAKE UP DELAY FOR ON-DIE ROUTERS

摘要

Techniques for power gating. A first on-die router has an output port to receive data from a switching fabric. The output port is placed in a power-gated state if there is no activity in the output port for a current cycle and no messages are to be received by the output port during a subsequent cycle. A second on-die router has an input port coupled with the output port of the first on-die router. The input port is placed in a power-gated state if an input port buffer is empty and the output port is not active. Power-gating of the input port and the output port are independent of each other.

主权项

1. An apparatus comprising:
a first on-die router having an output port coupled to receive data from a switching fabric, wherein the output port is to be placed in a power-gated state in response to no activity in the output port for a current cycle and no messages are to be received by the output port during a subsequent cycle; a second on-die router having an input port coupled with the output port of the first on-die router, wherein the input port is to be placed in a power-gated state in response to an input port buffer being empty and the output port being not active; wherein power-gating of the input port and the output port are independent of each other.