Granted Patent B1

US 9,800,524 · App. 14/864,323 · Granted Oct 24, 2017

Abstract

Claims (42)

1. A machine implemented method, comprising:

receiving a network packet at a first network interface card (NIC) operationally coupled to a computing device;

identifying a second NIC as a destination for the network packet;

placing the network packet by the first NIC at a host memory location, without utilizing resources of a processor of the computing device;

notifying the second NIC that the network packet has been placed at the host memory location;

retrieving the network packet by the second NIC from the host memory location;

transmitting the network packet by the second NIC to another destination;

notifying the first NIC by the second NIC that the packet has been transmitted by the second NIC; and

freeing the host memory location by the first NIC.

2. The method of claim 1 , further comprising:

freeing up space at a send queue used for notifying the second NIC that the network packet has been placed at the host memory.

3. The method of claim 1 , wherein the first NIC and the second NIC are coupled to the computing device using a PCI-Express link.

4. The method of claim 1 , wherein the first NIC and the second NIC use an Ethernet based networking protocol for network communication.

5. The method of claim 1 , wherein the first NIC and the second NIC are converged network adapters that can process both network and storage traffic.

6. The method of claim 1 , wherein the first NIC maintains a data structure to determine that the second NIC is the destination for the network packet.

7. The method of claim 1 , wherein the computing device processes the network packet when a flow associated with the network packet is not offloaded to the first NIC.

8. A non-transitory, machine readable storage medium having stored thereon instructions for performing a method, comprising machine executable code which when executed by at least one machine, causes the machine to:

receive a network packet at a first network interface card (NIC) operationally coupled to a computing device;

identify a second NIC as a destination for the network packet;

place the network packet by the first NIC at a host memory location, without utilizing resources of a processor of the computing device;

notify the second NIC that the network packet has been placed at the host memory location;

retrieve the network packet by the second NIC from the host memory location;

transmit the network packet by the second NIC to another destination;

notify the first NIC by the second NIC that the packet has been transmitted by the second NIC; and

free the host memory location by the first NIC.

9. The non-transitory, storage medium of claim 8 , further causing the machine to:

free up space at a send queue used for notifying the second NIC that the network packet has been placed at the host memory.

10. The non-transitory, storage medium of claim 8 , wherein the first NIC and the second NIC are coupled to the computing device using a PCI-Express link.

11. The non-transitory, storage medium of claim 8 , wherein the first NIC and the second NIC use an Ethernet based networking protocol for network communication.

12. The non-transitory, storage medium of claim 8 , wherein the first NIC and the second NIC are converged network adapters that can process both network and storage traffic.

13. The non-transitory, storage medium of claim 8 , wherein the first NIC maintains a data structure to determine that the second NIC is the destination for the network packet.

14. The non-transitory, storage medium of claim 8 , wherein the computing device processes the network packet when a flow associated with the network packet is not offloaded to the first NIC.

15. A system comprising:

a computing device having a processor for executing instructions out of a host memory device and coupled to a first network interface card (NIC) and a second NIC;

wherein the first NIC receives a network packet at the first network interface card (NIC) operationally coupled to a computing device; identifies the second NIC as a destination for the network packet; places the network packet at a host memory location, without utilizing resources of the processor of the computing device; and notifies the second NIC that the network packet has been placed at the host memory location; and

wherein the second NIC retrieves the network packet from the host memory location; transmits the network packet to another destination; notifies the first NIC that the packet has been transmitted by the second NIC; and the first NIC frees the host memory location.

16. The system of claim 15 , wherein the first NIC frees up space at a send queue used for notifying the second NIC that the network packet has been placed at the host memory.

17. The system of claim 15 , wherein the first NIC and the second NIC are coupled to the computing device using a PCI-Express link.

18. The system of claim 15 , wherein the first NIC and the second NIC use an Ethernet based networking protocol for network communication.

19. The system of claim 15 , wherein the first NIC and the second NIC are converged network adapters that can process both network and storage traffic.

20. The system of claim 15 , wherein the first NIC maintains a data structure to determine that the second NIC is the destination for the network packet for network communication.

21. The system of claim 15 , wherein the computing device processes the network packet when a flow associated with the network packet is not offloaded to the first NIC.

Assignments (7)