Reducing network latency

• US 10,425,512 B2
• Filed: 01/25/2018
• Issued: 09/24/2019
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Original Assignee: SolarFlare Communications Incorporated (Advanced Micro Devices, Inc.)
• Inventors: Pope, Steven Leslie, Riddoch, David James, Mansley, Kieran
• Primary Examiner(s): Eskandarnia, Arvin
• Application Number:
  US15/879,909
• Publication Number:
  US 20180152546A1
• Time in Patent Office: 607 Days
• CPC Class Codes: H04L 47/2475 for supporting traffic characterised by the type of applications
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/166 IP fragmentation; TCP segmentation
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

A method of transmitting data for use at a data processing system and network interface device, the data processing system being coupled to a network by the network interface device, the method comprising: forming a message template in accordance with a predetermined set of network protocols, the message template including at least in part one or more protocol headers; forming an application layer message in one or more parts; updating the message template with the parts of the application layer message; processing the message template in accordance with the predetermined set of network protocols so as to complete the protocol headers; and causing the network interface device to transmit the completed message over the network.

Claims

1. A method for minimising execution latency of a communication process provided for execution at a data processing system, the data processing system being coupled to a network and supporting a software interface, an application and a network protocol stack providing a communication process, and the method comprising the application periodically making a call to a dummy communication function of the software interface so as to cause the network protocol stack to perform the communication process without communicating data over the network.

2. A method for minimising execution latency as claimed in claim 1, wherein the software interface provides a communication function corresponding to the dummy communication function and the method further comprises the application subsequently making a call to the communication function in respect of a network message so as to cause the network protocol stack to perform the communication process and communicate the network message over the network.

3. A method for minimising execution latency as claimed in claim 2, wherein the dummy communication function and the corresponding communication function are one and the same, and the dummy communication function is identified by means of a flag of the communication function.

4. A method for minimising execution latency as claimed in claim 1, wherein the communication process is a transmit process and the step of periodically making a call to a dummy communication function comprises the application periodically making a call to a dummy transmit function of the software interface so as to cause the network protocol stack to perform the transmit process without transmitting data over the network.

5. A method for minimising execution latency as claimed in claim 4, wherein the dummy transmit function is called in respect of a partial message held at a transmit buffer of the data processing system.

6. A method for minimising execution latency as claimed in claim 1, wherein the communication process is a receive process and the step of periodically making a call to a dummy communication function comprises the application periodically making a call to a dummy receive function of the software interface so as to cause the network protocol stack to perform the receive process of the network protocol stack without receiving data over the network.

7. A data processing system coupled to a network by a network interface device and comprising:

a software interface providing a dummy communication function;

a network protocol stack providing a communication process; and

an application configured to periodically make a call to the dummy communication function so as to cause the network protocol stack to perform the communication process without communicating data over the network.

8. A data processing system as claimed in claim 7, wherein the software interface provides a communication function corresponding to the dummy communication function and the application is configured to subsequently make a call to the communication function in respect of a network message so as to cause the network protocol stack to perform the communication process and communicate the network message over the network.

9. A data processing system as claimed in claim 8, wherein the dummy communication function and the corresponding communication function are one and the same, and the dummy communication function is identified by means of a flag of the communication function.

10. A data processing system as claimed in claim 7, wherein the communication process is a transmit process and the application is configured to periodically make a call to a dummy transmit function of the software interface so as to cause the network protocol stack to perform the transmit process without transmitting data over the network.

11. A data processing system as claimed in claim 10, wherein the application is configured to call the dummy transmit function in respect of a partial message held at a transmit buffer of the data processing system.

12. A data processing system as claimed in claim 7, wherein the communication process is a receive process and the application is configured to periodically make a call to a dummy receive function of the software interface so as to cause the network protocol stack to perform the receive process of the network protocol stack without receiving data over the network.