Downstream device service latency reporting for power management

Patent metadata

Field	Value
Publication number	US-9838967-B2
Application number	US-201514595085-A
Country	US
Kind code	B2
Filing date	Jan 12, 2015
Priority date	Dec 31, 2008
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An apparatus is provided that includes a transceiver to transmit and receive data between an upstream device and the apparatus, and further includes service latency reporting logic coupled to the transceiver to provide a service latency tolerance value of the apparatus to the upstream device, the service latency tolerance value corresponding to an activity state of the apparatus. The service latency tolerance value for an idle activity state can be greater than the service latency tolerance value for an active activity state.

First claim

What is claimed is:

1. An apparatus comprising:
a transceiver to transmit and receive data between an upstream device and the apparatus;
service latency reporting logic coupled to the transceiver to determine a latency tolerance value of the apparatus and generate latency tolerance reporting data to report the latency tolerance value to the upstream device, wherein the latency tolerance value comprises a time value of latency corresponding to an activity state of the apparatus and the latency tolerance reporting data identifies the time value;
wherein the latency tolerance value for an idle activity state is greater than the latency tolerance value for an active activity state.

2. The apparatus of claim 1 , wherein the apparatus is a peripheral component interconnect express (PCIe) endpoint device.

3. The apparatus of claim 1 , wherein the service latency reporting logic comprises a memory to store the latency tolerance value.

4. The apparatus of claim 3 , wherein the memory is a register.

5. The apparatus of claim 1 , wherein the service latency reporting logic is to provide the latency tolerance value in response to a change in the activity state of the apparatus.

Assignees

• Intel Corp

Inventors

• Jeyaseelan Jaya L
• Walsh Jim
• Gough Robert E
• Cooper Barnes
• Songer Neil W

Classifications

• G06F1/3203

  Power management, i.e. event-based initiation of a power-saving mode · CPC title

• H04W52/0225 Primary

  using monitoring of external events, e.g. the presence of a signal · CPC title

• H04L43/0858

  One way delays · CPC title

• Y02B60/50

  Cross-Sectional Technologies · mapped topic

• G06F1/32 Primary

  Means for saving power · CPC title