Selective packet sequence acceleration in a network environment

Patent metadata

Field	Value
Publication number	US-9166921-B2
Application number	US-201414257131-A
Country	US
Kind code	B2
Filing date	Apr 21, 2014
Priority date	Jun 14, 2011
Publication date	Oct 20, 2015
Grant date	Oct 20, 2015

Abstract

At least one first frame of a first data flow is inspected by a general processing unit to at least determine whether a subsequent portion of the first data flow can be delegated to a network processing unit for accelerated processing. A deceleration trigger is defined for the first data flow from the inspection of the first frame. A first subsequent portion of the first data flow is delegated to a network processing unit for accelerated processing based, at least in part, on the defining of the first deceleration trigger. The first deceleration trigger defines at least one first condition that, when met during accelerated processing of the first data flow, prompts returning processing of the first data flow from the network processing unit to the general processing unit for further inspection of subsequent packets.

First claim

What is claimed is:

1. A method, comprising:
receiving, from a general processing unit, acceleration instructions defining one or more conditions for accelerated processing of at least a portion of a data flow by a network processing unit, wherein the acceleration instructions are attached to the at least one frame and the one or more conditions comprise at least a particular condition for returning processing of the data flow to the general processing unit;
receiving at least one frame of the portion of the data flow;
processing the at least one frame according to the instructions;
identifying the particular condition to end the accelerated processing; and
causing the data flow to be processed by the general processing unit based on identification of the particular condition.

2. The method of claim 1 , wherein the network processing unit strips the acceleration instructions from the first frame prior to processing the at least one frame.

3. The method of claim 1 , wherein processing the at least one frame comprises forwarding the frame to a remote computing device.

4. The method of claim 1 , wherein the particular condition comprises a deceleration trigger condition.

5. The method of claim 4 , wherein a particular data flow is determined to be ineligible for acceleration using the network processing unit based on a determination that no deceleration triggers are available for the particular data flow.

6. The method of claim 5 , wherein the particular data flow is to be processed entirely using the general processing unit in response to the determination that the particular data flow is ineligible for acceleration.

7. The method of claim 1 , wherein causing the data flow to be processed by the general processing unit comprises forwarding frames to the general processing unit for processing following identification of the particular condition.

8. The method of claim 7 , further comprising receiving another particular frame in the data flow forwarded to the general processing unit in response to the particular condition, wherein the particular frame includes acceleration instructions for further accelerated processing of the data stream by the network processing unit.

9. The method of claim 8 , wherein the general processing unit determines that the data flow can be further accelerated using the network processing unit.

10. The method of claim 1 , wherein the general processing unit determines the particular condition.

11. The method of claim 1 , wherein accelerated processing of at least a particular portion of the data flow comprises:
receiving each frame in the particular portion at the network processing unit; and
forwarding each frame in the particular portion to at least one remote computing device using the network processing unit, wherein each frame in the particular portion is forwarded by the network processing unit without processing by the general processing unit.

12. The method of claim 1 , wherein the particular condition comprises a time-based trigger.

13. The method of claim 1 , wherein the particular condition comprises a data volume-based trigger.

14. The method of claim 1 , wherein each frame in the data flow is received from a remote computing device via the network processing unit.

15. The method of claim 1 , wherein each frame in the data flow is forwarded to another, remote computing device, via the network processing unit.

16. Logic encoded in non-transitory media that includes code for execution and when executed by a processor is operable to perform operations comprising:
receiving, from a general processing unit, acceleration instructions defining one or more conditions for accelerated processing of at least a portion of a data flow by a network processing unit, wherein the acceleration instructions are attached to the at least one frame and the one or more conditions comprise at least a particular condition for returning processing of the data flow to the general processing unit;
receiving at least one frame of the portion of the data flow;
processing the at least one frame according to the instructions;
identifying the particular condition to end the accelerated processing; and
causing the data flow to be processed by the general processing unit based on identification of the particular condition.

17. A system comprising:
at least one memory element for storing data;
at least one network processor to:
receive, from a general processing unit, acceleration instructions defining one or more conditions for accelerated processing of at least a portion of a data flow by a network processing unit, wherein the acceleration instructions are attached to the at least one frame and the one or more conditions comprise at least a particular condition for returning processing of the data flow to the general processing unit;
receive at least one frame of the portion of the data flow;
process the at least one frame according to the instructions;
identify the particular condition to end the accelerated processing; and
cause the data flow to be processed by the general processing unit based on identification of the particular condition; and

the general processing unit.

18. The system of claim 17 , wherein the system comprises a gateway router for a network.

19. The system of claim 17 , further comprising:
an in-band communication link between the network processor and the general processor; and
an out-of-band communication link between the network processor and the general processor.

Assignees

• Cisco Tech Inc

Inventors

• Janarthanan Bhagatram Yaugand
• Mackie Robert A
• Tsang Tzu-Ming
• Dixon Walter

Classifications

• H04L47/31 Primary

  by tagging of packets, e.g. using discard eligibility [DE] bits · CPC title

• H04L45/38 Primary

  Flow based routing · CPC title

• H04L47/29

  using a combination of thresholds · CPC title

• H04L45/22

  Alternate routing · CPC title