Freeing transmit memory on a network interface device prior to receiving an acknowledgment that transmit data has been received by a remote device
DC CAFCFirst Claim
1. A method for communication involving a computer, a network, and a network interface device of the computer, the network interface device being coupled to the network, the method comprising:
- receiving, by the network interface device from the computer, a command to transmit application data from the computer to the network;
sending, by the network interface device to the network, data corresponding to the command, including prepending a transport layer header to at least some of the data;
sending, by the network interface device to the computer, a response to the command indicating that the data has been sent from the network interface device to the network, prior to receiving, by the network interface device from the network, an acknowledgement (ACK) that all the data corresponding to the command has been received; and
maintaining, by the network interface device, a Transport Control Protocol (TCP) connection that the command, the data and the ACK correspond to.
3 Assignments
Litigations
3 Petitions
Accused Products
Abstract
A transmit offload engine (TOE) such as an intelligent network interface device (INIC), video controller or host bus adapter (HBA) that can communicate data over transport protocols such as Transport Control Protocol (TCP) for a host. Such a device can send and receive data for the host to and from a remote host, over a TCP connection maintained by the device. For sending data, the device can indicate to the host that data has been transmitted from the device to a network, prior to receiving, by the device from the network, an acknowledgement (ACK) for all the data, accelerating data transmission. The greatest sequence number for which all previous bytes have been ACKed can be provided with a response to a subsequent command, with the host maintaining a table of ACK values to complete commands when appropriate.
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Citations
24 Claims
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1. A method for communication involving a computer, a network, and a network interface device of the computer, the network interface device being coupled to the network, the method comprising:
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receiving, by the network interface device from the computer, a command to transmit application data from the computer to the network; sending, by the network interface device to the network, data corresponding to the command, including prepending a transport layer header to at least some of the data; sending, by the network interface device to the computer, a response to the command indicating that the data has been sent from the network interface device to the network, prior to receiving, by the network interface device from the network, an acknowledgement (ACK) that all the data corresponding to the command has been received; and maintaining, by the network interface device, a Transport Control Protocol (TCP) connection that the command, the data and the ACK correspond to. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for communication involving a computer, a network, and a network interface device of the computer, the network interface device being coupled to the network, the method comprising:
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receiving, by the network interface device from the computer, a pointer to a command to transmit data from the computer to the network; sending, by the network interface device to the network, data corresponding to the command; sending, by the network interface device to the computer, a response to the command indicating that the data has been sent from the device to the network, prior to receiving, by the network interface device from the network, an acknowledgement (ACK) that all the data has been received; and maintaining, by the network interface device, a Transport Control Protocol (TCP) connection that the command, the data and the ACK correspond to. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 24)
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21. A method for communication involving a computer, a network, and a network interface device of the computer, the network interface device being coupled to the network, the method comprising:
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receiving, by the device from the computer, a series of commands to transmit application data from the computer to the network; sending, by the device to the network, data corresponding to the commands, including prepending a transport layer header to at least some of the data; and sending, by the device to the computer, a response to the commands, each response including a SND_UNA value; wherein data corresponding to one of the commands is sent by the device to the network prior to receiving an ACK for data corresponding to a prior one of the commands.
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22. A system for communication involving a computer, a network, and a network interface device of the computer, the network interface device being coupled to the network, the system comprising:
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means for receiving, by the network interface device from the computer, a command to transmit data from the computer to the network; means for sending, by the network interface device to the network, data corresponding to the command, including means for prepending a transport layer header to at least some of the data; and means for sending, by the network interface device to the computer, an indication that the data has been sent from the network interface device to the network, prior to receiving, by the network interface device from the network, an acknowledgement (ACK) that the data has been received.
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23. A non-transitory computer readable medium storing a data structure for use with a host that is connected to a network by a network interface device, the data structure comprising:
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instructions to receive, by the network interface device from the host, a command to transmit data from the host to the network; instructions to send, by the device to the network, data corresponding to the command, including instructions for prepending transport layer header to at least some of the data; and instructions to send, by the network interface device to the host, an indication that the data has been sent from the network interface device to the network, prior to receiving, by the network interface device from the network, an acknowledgement (ACK) that the data has been received.
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Specification