Dynamic energy-saving method and apparatus for PCIE device, and communication system thereof

  • US 9,563,257 B2
  • Filed: 09/03/2013
  • Issued: 02/07/2017
  • Est. Priority Date: 04/18/2012
  • Status: Active Grant
First Claim
Patent Images

1. An energy-saving method for a PCIE (Peripheral Component Interconnect-Express) device, the method comprising:

  • obtaining a system energy-saving policy; and

    using a PCIE energy-saving module to control a PCIE device and a PCIE link to enter a corresponding linkage energy-saving state based on the obtained system energy-saving policy, wherein the linkage energy-saving state comprises P0, P0_L0s, P0_L1, P1, P2, or P3, wherein;

    when the state is P0, the PCIE device is in a normal working state D0, and the PCIE link is in a fully active state L0,when the state is P0_L0s, the PCIE device is in the normal working state D0, and the PCIE link is in a standby state L0s,when the state is P0_L1, the PCIE device is in the normal working state D0, and the PCIE link is in a low-power-consumption standby state L1,when the state is P1, the PCIE device is in a lowly dormant state D1, and the PCIE link is in the low-power-consumption standby state L1,when the state is P2, the PCIE device is in a deep dormant state D2, and the PCIE link is in the low-power-consumption standby state L1, andwhen the state is P3, the PCIE device is in a hot power-off state D3hot, and the PCIE link is in the low-power-consumption standby state L1 or a power-off stage L2/L3 ready;

    wherein entering the P3 state comprises;

    controlling, if the PCIE device supports the P1 state, the PICE device and the PCIE link to enter the P1 state and keep steady, and then controlling them to enter the P3 state,controlling, if the PCIE device supports the P2 state, the PICE device and the PCIE link to enter the P2 state and keep steady, and then controlling them to enter the P3 state, andcontrolling the PCIE device and the PCIE link to enter the P3 state directly if the PCIE device supports neither the P1 nor the P2 state.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×