A communications device that includes a requester and a responder may support multiple transaction classes, including an ordered transaction class, while maintaining a bifurcated requester/responder architecture. Before a responder has a non-posted transaction response to transmit on an interconnect, it receives an indication from the requester that there is not a pending posted transaction on the interconnect.

The present invention is directed to data communication systems and techniques thereof. In a specific embodiment, the present invention provides a network connector that includes an interface for connecting to a host. The interface includes a circuit for utilizing two data paths for the host. The circuit is configured to transform the host address to different addresses based on the data path being used. There are other embodiments as well.

Embodiments of the present disclosure are directed to protocol state transition and/or resource state transition tracker configured to monitor, e.g., via filters, for certain protocol state transitions/changes or host hardware resource transitions/changes when a host processor in the control plane that performs such monitoring functions is unavailable or overloaded. The filters, in some embodiments, are pre-computed/computed by the host processor and transmitted to the protocol state transition and/or resource state transition tracker. The protocol state transition and/or resource state transition tracker may be used to implement a fast upgrade operation as well as load sharing and or load balancing operation with control plane associated components.

Technologies for adaptive network packet egress scheduling include a switch configured to configure an eligibility table for a plurality of ports of the switch, wherein the eligibility table includes a plurality of rounds. The switch is further configured to retrieve an eligible mask corresponding to a round of a plurality of rounds of the eligibility table presently being scheduled and determine a ready mask that indicates a ready status of each port. The switch is further configured to determine, for each port, whether the eligible status and the ready status indicate that port is both eligible and ready, and schedule, in response to a determination that at least one port has been determined to be both eligible and ready, each of the at least one port that has been determined to be both eligible and ready. Additional embodiments are described herein.

A transmission device (10) includes a flow table (11) that stores identification information about an uninterruptible target flow; a transmission-side identification unit (12) that identifies whether a received packet is from the target flow or a non-target flow based on whether the received packet matches the identification information about the target flow stored in the flow table (11); a tag application unit (13) that applies, to packets from the target flow, an uninterruptible identifier indicating that the packets are from the target flow and a sequence number for distinguishing the packets from other packets; and a branch unit (14) that branches the packets from the target flow processed by the tag application unit (13) into packets to be transferred to an active path (41) among redundant routes and packets to be transferred to a backup path (42) among the redundant routes.

An interconnection network for a processing unit having an array of cores. The interconnection network includes routers and adaptable links that selectively connect routers in the interconnection network. For example, each router may be electrically connected to one or more of the adaptable links via one or more multiplexers and a link controller may control the multiplexers to selectively connect routers via the adaptable links. In another example, adaptable links may be formed as part of an interposer and the link controller selectively connect routers via the adaptable links in the interposer using interposer switches. The adaptable links enable the interconnection network to be dynamically partitioned. Each of those partitions may be dynamically reconfigured to form a topology.

A network switch is capable of supporting cut-through switching and interface channelization with enhanced system performance. The network switch includes a plurality of ingress tiles, each tile including a virtual output queue (VOQ) scheduler operable to submit schedule requests to a fabric scheduler. Data is requested in unit of quantum, which may aggregate multiple packets, and which reduces schedule latency. Each request is associated with a start-of-quantum (SoR) state or a middle-of-quantum (MoR) state to support cut-through. The fabric scheduler performs a multi-stage scheduling process to progressively narrow the selection of requests, including stages of arbitration in virtual output port level, virtual output port group level, tile level, egress port level, and port group level. Each tile receives the grants for its requests and accordingly sends request data to a switch fabric for transmission to the destination egress ports.

Example techniques and computing devices are disclosed. An example computing device includes a first non-uniform memory access (NUMA) node and a second NUMA nod. The first NUMA node includes a first network interface card, a first virtual router for one or more virtual networks, the first virtual router comprising first processing circuitry and configured with a first virtual host interface having a first Internet Protocol (IP) address, and a first workload executing on the first NUMA node. The second NUMA node includes a second network interface card, a second virtual router for the one or more virtual networks, the second virtual router comprising second processing circuitry and configured with a second virtual host interface having a second IP address, and a second workload executing on the second NUMA node.

A storage apparatus includes: a plurality of storage controllers including controller interfaces including a plurality of interface ports for connection to the plurality of switches having switch ports, a plurality of virtual networks configured by one of the switch ports is configured in the switch, and the storage controller sends a first packet for specifying the switch port to which the interface port is to be connected from the interface port to the plurality of virtual networks, and determines an address of the interface port used for data transfer between the storage controllers based on a switch number of the switch and a switch port number of the switch port in a case where a second packet including information for specifying the switch number of the switch and the switch port number of the switch port to which the interface port is to be connected is received.

A switch is provided for routing packets in an interconnection network. The switch includes egress ports to transmit packets, and ingress ports to receive packets. The switch also includes a buffer capacity circuit configured to obtain local buffer capacity for buffers configured to buffer packets transmitted via the switch. The switch also includes a telemetry circuit configured to receive telemetry flow control units from next switches coupled to the switch. Each telemetry flow control unit corresponds to buffer capacity at a respective next switch. The switch also includes a network capacity circuit configured to compute network capacity for transmitting packets to a destination based on the telemetry flow control units and the local buffer capacity. The switch also includes a routing circuit configured to receive packets via the ingress ports, and route the packets to the destination, via the egress ports, with bandwidth proportional to the network capacity.