公开(公告)号：US09166687B2

公开(公告)日：2015-10-20

申请号：US13852964

申请日：2013-03-28

Applicant: Cisco Technology, Inc.

Inventor： Rajesh L G ,  Deepak Srinivas Mayya ,  Lalit Kumar

IPC: G01R31/08 ,  H04B10/25 ,  H04B10/077

CPC classification number: H04B10/25 ,  H04B10/077

Abstract: Various systems and methods for using credits to determine cable length are described herein. A number of available credits is determined at a transmitter, the credits being received at the transmitter from a receiver, and each of the credits being used for the transmitter to transmit a packet to the receiver. An average number of credits for a period is determined. The cable length between the transmitter and the receiver is determined based on the average number of credits for the period.

Abstract translation: 这里描述了用于使用信用来确定电缆长度的各种系统和方法。 在发射机处确定多个可用的信用，信号在发射机处从接收机接收，并且每个信用被用于发射机将数据包发射到接收机。 确定一段期间的平均信用额。 发射机和接收机之间的电缆长度是根据该周期的平均信用数确定的。

公开(公告)号：US11036649B2

公开(公告)日：2021-06-15

申请号：US16374952

申请日：2019-04-04

Applicant: Cisco Technology, Inc.

Inventor： Ravikiran Kaidala Lakshman ,  Tanjore K. Suresh ,  Deepak Srinivas Mayya ,  Sagar Borikar

IPC: G06F12/1081 ,  H04L12/879 ,  G06F12/1036 ,  H04L12/861

Abstract: Presented herein are techniques enable existing hardware input/output resources, such as the hardware queues (queue control registers), of a network interface card to be shared with different hosts (i.e., each queue mapped to many hosts) by logically segregating the hardware I/O resources using assignable interfaces each associated with a distinct Process Address Space Identifier (PASID). That is, different assignable interfaces are created and associated with different PASIDs, and these assignable interfaces each correspond to a different host (i.e., there is a mapping between a host, an assignable interface, a PASID, and a partition of a hardware queue). The result is that that the hosts can use the assignable interface to directly access the hardware queue partition that corresponds thereto.

公开(公告)号：US10908841B2

公开(公告)日：2021-02-02

申请号：US16139264

申请日：2018-09-24

Applicant: Cisco Technology, Inc.

Inventor： Ravikiran Kaidala Lakshman ,  Deepak Srinivas Mayya ,  Tanjore K. Suresh ,  David S. Walker ,  Sagar Borikar ,  Shrikant Vaidya

IPC: G06F3/06 ,  G06F15/173 ,  H04L29/06

Abstract: Presented herein are methodologies for increasing effective throughput on a network. A method includes receiving a command request via a communication bus, the command request including a command ID, determining, based on the command ID, whether data in the command request is to be joined with data from other command requests having the same command ID, when it is determined, based on the command ID, that the data in the command request is to be joined with other data from other command requests having the same command ID, writing the data to a selected buffer in which the other data is already stored, and causing the data and the other data in the buffer to be sent as a payload of a single packet across a communications fabric.

公开(公告)号：US20200274829A1

公开(公告)日：2020-08-27

申请号：US16284900

申请日：2019-02-25

Applicant: Cisco Technology, Inc.

Inventor： Tanjore K Suresh ,  Ravikiran Kaidala Lakshman ,  Deepak Srinivas Mayya

IPC: H04L12/861 ,  H04L12/863 ,  H04L12/939

Abstract: The disclosed technology relates to a process for general-purpose ring buffer handling in a network controller. Specifically, general purpose ring buffers are used in software queue on both the host domain and the network controller to carry out user-defined protocols. The protocols define the relationship of the ring buffers in the host domain and the network controller domain (e.g. how data is moved and processed). The protocols minimize interruptions to the network controller. Furthermore, the implementation of ring buffers in the network controller domain also provides additional resources to the host domain for carrying out the user-defined protocols.

公开(公告)号：US20200097212A1

公开(公告)日：2020-03-26

申请号：US16139264

申请日：2018-09-24

Applicant: Cisco Technology, Inc.

Inventor： Ravikiran Kaidala Lakshman ,  Deepak Srinivas Mayya ,  Tanjore K. Suresh ,  David S. Walker ,  Sagar Borikar ,  Shrikant Vaidya

IPC: G06F3/06 ,  G06F15/173 ,  H04L29/06

Abstract: Presented herein are methodologies for increasing effective throughput on a network. A method includes receiving a command request via a communication bus, the command request including a command ID, determining, based on the command ID, whether data in the command request is to be joined with data from other command requests having the same command ID, when it is determined, based on the command ID, that the data in the command request is to be joined with other data from other command requests having the same command ID, writing the data to a selected buffer in which the other data is already stored, and causing the data and the other data in the buffer to be sent as a payload of a single packet across a communications fabric.

公开(公告)号：US10958597B2

公开(公告)日：2021-03-23

申请号：US16284900

申请日：2019-02-25

Applicant: Cisco Technology, Inc.

Inventor： Tanjore K Suresh ,  Ravikiran Kaidala Lakshman ,  Deepak Srinivas Mayya

IPC: H04L12/861 ,  H04L12/939 ,  H04L12/863

Abstract: The disclosed technology relates to a process for general-purpose ring buffer handling in a network controller. Specifically, general purpose ring buffers are used in software queue on both the host domain and the network controller to carry out user-defined protocols. The protocols define the relationship of the ring buffers in the host domain and the network controller domain (e.g. how data is moved and processed). The protocols minimize interruptions to the network controller. Furthermore, the implementation of ring buffers in the network controller domain also provides additional resources to the host domain for carrying out the user-defined protocols.

公开(公告)号：US20200320017A1

公开(公告)日：2020-10-08

申请号：US16374952

申请日：2019-04-04

Applicant: Cisco Technology, Inc.

Inventor： Ravikiran Kaidala Lakshman ,  Tanjore K. Suresh ,  Deepak Srinivas Mayya ,  Sagar Borikar

IPC: G06F12/1081 ,  H04L12/861 ,  G06F12/1036 ,  H04L12/879

Abstract: Presented herein are techniques enable existing hardware input/output resources, such as the hardware queues (queue control registers), of a network interface card to be shared with different hosts (i.e., each queue mapped to many hosts) by logically segregating the hardware I/O resources using assignable interfaces each associated with a distinct Process Address Space Identifier (PASID). That is, different assignable interfaces are created and associated with different PASIDs, and these assignable interfaces each correspond to a different host (i.e., there is a mapping between a host, an assignable interface, a PASID, and a partition of a hardware queue). The result is that that the hosts can use the assignable interface to directly access the hardware queue partition that corresponds thereto.