公开(公告)号：US11323390B2

公开(公告)日：2022-05-03

申请号：US16946162

申请日：2020-06-08

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nicholas George McDonald ,  Darel Neal Emmot

IPC: H04L12/911 ,  H04L12/863 ,  H04L47/70 ,  H04L47/62 ,  H04L47/625

Abstract: Example implementations relate to hybrid arbitration of requests for access to a shared pool of resources. An example implementation includes receiving a set of requests for access to the shared pool of resources. The requests may each be from any number of traffic classes. A traffic class may be selected according to turn-based arbitration logic. Additionally, a request from each traffic class of a subset of received requests may be selected. A request selected by the age-based arbitration logic and of the selected traffic class may be granted access to the shared pool of resources.

公开(公告)号：US10476780B2

公开(公告)日：2019-11-12

申请号：US15719928

申请日：2017-09-29

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nicholas George McDonald ,  Michael Isaev

IPC: H04L12/707 ,  H04L12/733 ,  H04L12/801

Abstract: Examples relate to routing packets based on the actual congestion sensed in the minimal and the non-minimal candidate routes between a source network device and a destination network device. A packet is received at a network device in a network and all possible minimal and non-minimal candidate routes for the packet to be routed to the destination network device are determined. An adaptive weight is assigned to the non-minimal candidate routes, wherein the adaptive weight is a function of congestion of the minimal candidate routes and the non-minimal candidate routes. An optimal route is selected among the plurality of candidate routes and the packet is routed to the destination device using the optimal route.

公开(公告)号：US10972394B2

公开(公告)日：2021-04-06

申请号：US15939532

申请日：2018-03-29

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Gregg B. Lesartre ,  Derek Alan Sherlock ,  Nicholas George McDonald

IPC: G01R31/08 ,  H04L12/26 ,  H04L12/835 ,  H04L12/801 ,  H04L12/825

Abstract: Example implementations relate to congestion management across a network fabric. An example implementation includes setting an uncongested sequence length threshold to a first value. A completed transaction received count may also be set to an initial value. The completed transaction received count may be incremented in response to a completion of a transaction request. In response to a detected congestion event, the injection rate may be decreased. A second value for the uncongested sequence length threshold may be determined from the CTR count, and the uncongested sequence length threshold may be set to the second value. Furthermore, in response to the CTR count being greater than or equal to the uncongested sequence length threshold, the injection rate may be increased.

公开(公告)号：US10757038B2

公开(公告)日：2020-08-25

申请号：US16029442

申请日：2018-07-06

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Nicholas George McDonald ,  Darel Neal Emmot

IPC: H04L12/933 ,  H04L12/911 ,  H04L5/00

Abstract: Examples relate to switching devices comprising a switch controller and a plurality of interconnected sub-switches forming an internal network of the switching device. A packet is received at a first sub-switch of the plurality of interconnected sub-switches. The packet is to be routed to a particular external output port of a second sub-switch of the plurality of interconnected sub-switches. Upon reception of the packet, the switch controller reserves a space for the packet in a queue associated to the particular external output port. Then, the switch controller routes the packet on the internal network to the particular external output to occupy the reserved space for the packet.

公开(公告)号：US10693808B2

公开(公告)日：2020-06-23

申请号：US15883911

申请日：2018-01-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nicholas George McDonald ,  Darel N. Emmot

IPC: G06F15/173 ,  H04L12/911 ,  H04L12/863

Abstract: Example implementations relate to hybrid arbitration of requests for access to a shared pool of resources. An example implementation includes receiving a set of requests for access to the shared pool of resources. The requests may each be from any number of traffic classes. A traffic class may be selected according to turn-based arbitration logic. Additionally, a request from each traffic class of a subset of received requests may be selected. A request selected by the age-based arbitration logic and of the selected traffic class may be granted access to the shared pool of resources.

公开(公告)号：US20180367444A1

公开(公告)日：2018-12-20

申请号：US15626983

申请日：2017-06-19

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Gregg B. Lesartre ,  Derek Alan Sherlock ,  Gary Gostin ,  Nicholas George McDonald ,  Alan Davis ,  Darel N. Emmot ,  John Kim

IPC: H04L12/733 ,  H04L12/26

CPC classification number: H04L45/20 ,  H04L43/0864 ,  H04L43/106 ,  H04L45/26 ,  H04L47/286 ,  H04L47/32 ,  H04L67/325

Abstract: Example implementations relate to calculating a time to live (TTL). An example implementation includes receiving a transaction request containing a first time to live (TTL) from a requester. A second TTL for a transaction response may be computed, and a transaction response containing the second TTL may be transmitted.

公开(公告)号：US20180343210A1

公开(公告)日：2018-11-29

申请号：US15606402

申请日：2017-05-26

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nicholas George McDonald ,  Gary Gostin ,  Darel N. Emmot ,  Gregg B. Lesartre ,  Al Davis ,  Derek Alan Sherlock

IPC: H04L12/935

Abstract: Examples relate to virtual channel routing in networks considering VC actions to be performed by the packets while routed through the network. A packet is received at an input port of a network device of a network and an output port and a VC action is determined from a routing table associated to the input port based on a packet's destination network device. A VC mask is determined from a Virtual Channel Action Table (VCAT), associated to the routing table, based on a packet's ingress VC and the VC action. A particular VC among the set of VCs defined in the VC mask is selected and the packet is routed to the destination network device using the output port and the particular VC.

公开(公告)号：US20210258252A1

公开(公告)日：2021-08-19

申请号：US17247473

申请日：2020-12-11

Applicant: Hewlett Packard Enterprise Development LP

Inventor： David Olson ,  Darel Neal Emmot ,  Nicholas George McDonald ,  John Kim

IPC: H04L12/721 ,  H04L12/707 ,  H04L12/717 ,  H04L12/873 ,  H04L12/803 ,  H04L12/801

Abstract: A switch includes a plurality of ingress ports, a plurality of egress ports, and a plurality of buffers comprising a buffer coupled to each ingress port, egress port pair. An ingress port is to determine a plurality of potential egress ports for a packet. The ingress port is to select an egress port of the plurality of potential egress ports based on congestion of the corresponding buffers coupled to the ingress port and to each of the plurality of potential egress ports. The ingress port is to place the packet into the corresponding buffer coupled to the ingress port and the selected egress port.

公开(公告)号：US10938751B2

公开(公告)日：2021-03-02

申请号：US15956206

申请日：2018-04-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Nicholas George McDonald ,  Darel N Emmot

IPC: H04L12/861 ,  H04L12/933 ,  H04L12/947 ,  H04L12/751

Abstract: Examples relate to hierarchical switching devices comprising a plurality of sub-switches forming a fully interconnected all-to-all network. The sub-switches comprise internal input ports and internal output ports to exchange packets with other sub-switches within the fully interconnected all-to-all network. The internal input ports of the sub-switches have exclusive access to a queue partition for each external output port of the respective sub-switch. A switch controller receives a packet at a first sub-switch of the plurality of sub-switches that is to be routed to a particular external output port of a second sub-switch of the plurality of sub-switches. The switch controller routes the packet directly from the first sub-switch to the second sub-switch using an internal output port of the first sub-switch and a queue partition of the second sub-switch that is for the particular external output port of the second sub-switch.

公开(公告)号：US20200076742A1

公开(公告)日：2020-03-05

申请号：US16115121

申请日：2018-08-28

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nicholas George McDonald ,  Darel Neal Emmot

IPC: H04L12/801 ,  H04L12/835 ,  H04L12/851 ,  H04L12/925 ,  H04L12/915 ,  H04L12/861

Abstract: Examples relate to methods for sending data between a senders and receivers coupled by a link. These methods comprise allocating a plurality of credit pools in a buffer on the receiver. These credits represent a portion of memory space in the buffer to store data received from the sender. Then, the sender allocates a number of credits from a plurality of credits to each virtual channel. A number of virtual channels from the plurality of virtual channels is mapped to the credit pools. The sender sends a data block to the receiver through a particular virtual channel when there are enough credits available in at least one of the particular virtual channel and the data pool to which the particular virtual channel is mapped. The sender decrements a credit counter associated with the corresponding at least one of the particular virtual channel and the data pool.