Patent application number | Description | Published |
20110058571 | DATA SWITCH WITH SHARED PORT BUFFERS - A communication apparatus includes a plurality of switch ports, each switch port including one or more port buffers for buffering data that traverses the switch port. A switch fabric is coupled to transfer the data between the switch ports. A switch control unit is configured to reassign at least one port buffer of a given switch port to buffer a part of the data that does not enter or exit the apparatus via the given switch port, and to cause the switch fabric to forward the part of the data to a destination switch port via the at least one reassigned port buffer. | 03-10-2011 |
20110096668 | HIGH-PERFORMANCE ADAPTIVE ROUTING - A method for communication includes routing a first packet, which belongs to a given packet flow, over a first routing path through a communication network. A second packet, which follows the first packet in the given packet flow, is routed using a time-bounded Adaptive Routing (AR) mode, by evaluating a time gap between the first and second packets, routing the second packet over the first routing path if the time gap does not exceed a predefined threshold, and, if the time gap exceeds the predefined threshold, selecting a second routing path through the communication network that is potentially different from the first routing path, and routing the second packet over the second routing path. | 04-28-2011 |
20110119673 | CROSS-CHANNEL NETWORK OPERATION OFFLOADING FOR COLLECTIVE OPERATIONS - A Network Interface (NI) includes a host interface, which is configured to receive from a host processor of a node one or more cross-channel work requests that are derived from an operation to be executed by the node. The NI includes a plurality of work queues for carrying out transport channels to one or more peer nodes over a network. The NI further includes control circuitry, which is configured to accept the cross-channel work requests via the host interface, and to execute the cross-channel work requests using the work queues by controlling an advance of at least a given work queue according to an advancing condition, which depends on a completion status of one or more other work queues, so as to carry out the operation. | 05-19-2011 |
20120082164 | Cell-Based Link-Level Retry Scheme - A method for communication includes receiving a packet at a first node for transmission over a link to a second node. The data in the packet is divided into a sequence of cells of a predetermined data size. The cells have respective sequence numbers. The cells are transmitted in sequence over the link, while storing the transmitted cells in a buffer at the first node. The first node receives acknowledgments indicating the respective sequence numbers of the transmitted cells that were received at the second node. Upon receiving an indication at the first node that a transmitted cell having a given sequence number was not properly received at the second node, the stored cells are retransmitted from the buffer starting from the cell with the given sequence number. | 04-05-2012 |
20130077489 | CREDIT-BASED FLOW CONTROL FOR ETHERNET - A method for communication includes sending a pause frame from a first node to a second node over a communication link between the nodes. In response to the pause frame, one or more data frames are immediately transmitted from the second node to the first node upon receipt of the pause frame at the second node. | 03-28-2013 |
20130142039 | Configurable Access Control Lists Using TCAM - A communication apparatus includes a Content-Addressable Memory (CAM) and packet processing circuitry. The packet processing circuitry is configured to store in respective regions of the CAM multiple Access Control Lists (ACLs) that are defined for respective packet types, to classify an input packet to a respective packet type selected from the packet types, to identify a region holding an ACL defined for the selected packet type, and to process the input packet in accordance with the ACL stored in the identified region. | 06-06-2013 |
20140169170 | MAINTAINING CONSISTENT QUALITY OF SERVICE BETWEEN SUBNETS - Network apparatus includes a plurality of interfaces, which are coupled to a network so as to receive and transmit data packets having respective link-layer headers and network-layer headers. Each link-layer header includes respective source and destination link-layer addresses and a link-layer priority value. Switching and routing logic is configured, responsively to the network-layer headers, to transfer each data packet from a respective ingress interface to a respective egress interface and to modify the source and destination link-layer addresses of the transferred data packet while copying the link-layer priority value from the ingress interface to the egress interface without modification. | 06-19-2014 |
20140211631 | ADAPTIVE ROUTING USING INTER-SWITCH NOTIFICATIONS - A method includes receiving in a network switch of a communication network communication traffic that originates from a source node and arrives over a route through the communication network traversing one or more preceding network switches, for forwarding to a destination node. In response to detecting in the network switch a compromised ability to forward the communication traffic to the destination node, a notification is sent to the preceding network switches. The notification is to be consumed by the preceding network switches and requests the preceding network switches to modify the route so as not to traverse the network switch. | 07-31-2014 |
20140324939 | CROSS-CHANNEL NETWORK OPERATION OFFLOADING FOR COLLECTIVE OPERATIONS - A Network Interface (NI) includes a host interface, which is configured to receive from a host processor of a node one or more cross-channel work requests that are derived from an operation to be executed by the node. The NI includes a plurality of work queues for carrying out transport channels to one or more peer nodes over a network. The NI further includes control circuitry, which is configured to accept the cross-channel work requests via the host interface, and to execute the cross-channel work requests using the work queues by controlling an advance of at least a given work queue according to an advancing condition, which depends on a completion status of one or more other work queues, so as to carry out the operation. | 10-30-2014 |
Patent application number | Description | Published |
20110010557 | CONTROL MESSAGE SIGNATURE FOR DEVICE CONTROL - A method of controlling a peripheral device includes generating, in a host processor, a control message for transmission to the peripheral device, and calculating a signature for the control message. The control message and the signature are written to an address in a system memory of the host processor, and the peripheral device is notified of the address, so as to cause the device to read the control message and the signature from the system memory. | 01-13-2011 |
20110083064 | PROCESSING OF BLOCK AND TRANSACTION SIGNATURES - A network communication device includes a host interface, which is coupled to communicate with a host processor, having a host memory, so as to receive a work request to execute a transaction in which a plurality of data blocks are to be transferred over a packet network. Processing circuitry is configured to process multiple data packets so as to execute the transaction, each data packet in the transaction containing a portion of the data blocks, and the multiple data packets including at least first and last packets, which respectively contain the first and last data blocks of the transaction. The processing circuitry is configured to compute a transaction signature over the data blocks while processing the data packets so that at least the first data block passes out of the network communication device through one of the interfaces before computation of the transaction signature is completed. | 04-07-2011 |
20110116512 | Dynamically-Connected Transport Service - A method of communication includes receiving, in a network interface device, first and second requests from an initiator process running on an initiator host to transmit, respectively, first and second data to first and second target processes running on one or more target nodes, via a packet network. A single dynamically-connected initiator context is allocated for serving both the first and second requests. A first connect packet referencing the dynamically-connected (DC) initiator context is directed to the first target process so as to open a first dynamic connection with the first target process, followed by transmission of the first data over the first dynamic connection. The first dynamic connection is closed after the transmission of the first data, and a second connect packet is transmitted so as to open a second dynamic connection with the second target process, followed by transmission of the second data. | 05-19-2011 |
20110119673 | CROSS-CHANNEL NETWORK OPERATION OFFLOADING FOR COLLECTIVE OPERATIONS - A Network Interface (NI) includes a host interface, which is configured to receive from a host processor of a node one or more cross-channel work requests that are derived from an operation to be executed by the node. The NI includes a plurality of work queues for carrying out transport channels to one or more peer nodes over a network. The NI further includes control circuitry, which is configured to accept the cross-channel work requests via the host interface, and to execute the cross-channel work requests using the work queues by controlling an advance of at least a given work queue according to an advancing condition, which depends on a completion status of one or more other work queues, so as to carry out the operation. | 05-19-2011 |
20120246535 | PROCESSING OF BLOCK AND TRANSACTION SIGNATURES - A network communication device includes a host interface, which is coupled to communicate with a host processor, having a host memory, so as to receive a work request to execute a transaction in which a plurality of data blocks are to be transferred over a packet network. Processing circuitry is configured to process multiple data packets so as to execute the transaction, each data packet in the transaction containing a portion of the data blocks, and the multiple data packets including at least first and last packets, which respectively contain the first and last data blocks of the transaction. The processing circuitry is configured to compute a transaction signature over the data blocks while processing the data packets so that at least the first data block passes out of the network communication device through one of the interfaces before computation of the transaction signature is completed. | 09-27-2012 |
20130067193 | NETWORK INTERFACE CONTROLLER WITH FLEXIBLE MEMORY HANDLING - An input/output (I/O) device includes a host interface for connection to a host device having a memory, and a network interface, which is configured to transmit and receive, over a network, data packets associated with I/O operations directed to specified virtual addresses in the memory. Processing circuitry is configured to translate the virtual addresses into physical addresses using memory keys provided in conjunction with the I/O operations and to perform the I/O operations by accessing the physical addresses in the memory. At least one of the memory keys is an indirect memory key, which points to multiple direct memory keys, corresponding to multiple respective ranges of the virtual addresses, such that an I/O operation referencing the indirect memory key can cause the processing circuitry to access the memory in at least two of the multiple respective ranges. | 03-14-2013 |
20130114599 | PACKET STEERING - A method for steering packets, including receiving a packet and determining parameters to be used in steering the packet to a specific destination, in one or more initial steering stages, based on one or more packet specific attributes. The method further includes determining an identity of the specific destination of the packet in one or more subsequent steering stages, governed by the parameters determined in the one or more initial stages and one or more packet specific attributes, and forwarding the packet to the determined specific destination. | 05-09-2013 |
20130135999 | DESTINATION-BASED CONGESTION CONTROL - A method for communication includes sending communication packets over a network from a first network interface. A notification, which originates from a second network interface and indicates a network congestion encountered by one or more of the packets, is received in the first network interface. A network address of the second network interface is identified based on the notification. A transmission rate of subsequent packets addressed to the network address is regulated responsively to the notification, irrespective of a transport service instance on which the subsequent packets are sent from the first network interface. | 05-30-2013 |
20130166793 | HOST CHANNEL ADAPTER WITH PATTERN-TYPE DMA - An input/output (I/O) device includes a memory buffer and off-loading hardware. The off-loading hardware is configured to accept from a host a scatter/gather list including one or more entries. The entries include at least a pattern-type entry that specifies a period of a periodic pattern of addresses that are to be accessed in a memory of the host. The off-loading hardware is configured to transfer data between the memory buffer of the I/O device and the memory of the host by accessing the addresses in the memory of the host in accordance with the periodic pattern at intervals indicated in the period. | 06-27-2013 |
20130315237 | Prioritized Handling of Incoming Packets by a Network Interface Controller - A network interface controller includes a host interface, which is configured to be coupled to a host processor having a host memory. A network interface is configured to receive data packets from a network, each data packet including a header, which includes header fields, and a payload including data. Packet processing circuitry is configured to process one or more of the header fields and at least a part of the data and to select, responsively at least to the one or more of the header fields, a location in the host memory. The circuitry writes the data to the selected location and upon determining that the processed data satisfies a predefined criterion, asserts an interrupt on the host processor so as to cause the host processor to read the data from the selected location in the host memory. | 11-28-2013 |
20140003441 | Responding to dynamically-connected transport requests | 01-02-2014 |
20140089450 | Look-Ahead Handling of Page Faults in I/O Operations - A method for data transfer includes receiving in an input/output (I/O) operation a first segment of data to be written to a specified virtual address in a host memory. Upon receiving the first segment of the data, it is detected that a first page that contains the specified virtual address is swapped out of the host memory. At least one second page of the host memory is identified, to which a second segment of the data is expected to be written. Responsively to detecting that the first page is swapped out and to identifying the at least one second page, at least the first and second pages are swapped into the host memory. After swapping at least the first and second pages into the host memory, the data are written to the first and second pages. | 03-27-2014 |
20140089451 | Application-assisted handling of page faults in I/O operations - A method for data transfer includes receiving in an operating system of a host computer an instruction initiated by a user application running on the host processor identifying a page of virtual memory of the host computer that is to be used in receiving data in a message that is to be transmitted over a network to the host computer but has not yet been received by the host computer. In response to the instruction, the page is loaded into the memory, and upon receiving the message, the data are written to the loaded page. | 03-27-2014 |
20140089528 | Use of free pages in handling of page faults - A method for data transfer includes receiving in an input/output (I/O) operation data to be written to a specified virtual address in a host memory. Upon receiving the data, it is detected that a first page that contains the specified virtual address is swapped out of the host memory. Responsively to detecting that the first page is swapped out, the received data are written to a second, free page in the host memory, and the specified virtual address is remapped to the free page. | 03-27-2014 |
20140115206 | METHODS AND SYSTEMS FOR RUNNING NETWORK PROTOCOLS OVER PERIPHERAL COMPONENT INTERCONNECT EXPRESS - Methods and devices for running network protocols over Peripheral Component Interconnect Express are disclosed. The methods and devices may receive an electronic signal comprising data. The methods and devices may also determine the data corresponds to a protocol selected from a set comprising a PCIe protocol and a network protocol. In addition, the methods and devices may also configure a CPU based on the determined protocol. The methods and devices may also receive a second electronic signal comprising second data at a pin or land of the CPU, wherein the pin or land is connected to a PCIe lane and wherein the second data is formatted in accordance with determined protocol. In addition, the methods and devices may process the second data in accordance with the determined protocol. | 04-24-2014 |
20140122828 | Sharing address translation between CPU and peripheral devices - A method for memory access includes maintaining in a host memory, under control of a host operating system running on a central processing unit (CPU), respective address translation tables for multiple processes executed by the CPU. Upon receiving, in a peripheral device, a work item that is associated with a given process, having a respective address translation table in the host memory, and specifies a virtual memory address, the peripheral device translates the virtual memory address into a physical memory address by accessing the respective address translation table of the given process in the host memory. The work item is executed in the peripheral device by accessing data at the physical memory address in the host memory. | 05-01-2014 |
20140129741 | PCI-EXPRESS DEVICE SERVING MULTIPLE HOSTS - A method includes establishing in a peripheral device at least first and second communication links with respective first and second hosts. The first communication link is presented to the first host as the only communication link with the peripheral device, and the second communication link is presented to the second host as the only communication link with the peripheral device. The first and second hosts are served simultaneously by the peripheral device over the respective first and second communication links. | 05-08-2014 |
20140143454 | Reducing size of completion notifications - A computer peripheral device includes a host interface, which is configured to communicate over a bus with a host processor and with a system memory of the host processor. Processing circuitry in the peripheral device is configured to receive and execute work items submitted to the peripheral device by client processes running on the host processor, and responsively to completing execution of the work items, to write completion reports to the system memory, including first completion reports of a first data size and second completion reports of a second data size, which is smaller than the first data size. | 05-22-2014 |
20140143455 | Efficient delivery of completion notifications - A computer peripheral device includes a host interface, which is configured to communicate over a bus with a host processor and with a system memory of the host processor. Processing circuitry in the peripheral device is configured to receive and execute work items submitted to the peripheral device by client processes running on the host processor, and responsively to completing execution of the work items, to generate completion reports and to write a plurality of the completion reports to the system memory via the bus together in a single bus transaction. | 05-22-2014 |
20140185616 | Network interface controller supporting network virtualization - A network interface device includes a host interface for connection to a host processor having a memory. A network interface is configured to transmit and receive data packets over a data network, which supports multiple tenant networks overlaid on the data network. Processing circuitry is configured to receive, via the host interface, a work item submitted by a virtual machine running on the host processor, and to identify, responsively to the work item, a tenant network over which the virtual machine is authorized to communicate, wherein the work item specifies a message to be sent to a tenant destination address. The processing circuitry generates, in response to the work item, a data packet containing an encapsulation header that is associated with the tenant network, and to transmit the data packet over the data network to at least one data network address corresponding to the specified tenant destination address. | 07-03-2014 |
20140247832 | Responding to dynamically-connected transport requests - A method for communication, includes allocating, in a network interface controller (NIC) a single dynamically-connected (DC) initiator context for serving requests from an initiator process running on the initiator host to transmit data to multiple target processes running on one or more target nodes. The NIC transmits a first connect packet directed to a first target process and referencing the DC initiator context so as to open a first dynamic connection with the first target process. The NIC receives over the packet network, in response to the first connect packet, a first acknowledgment packet containing a first session identifier (ID). Following receipt of the first acknowledgment packet, the NIC transmits one or more first data packets containing the first session ID over the first dynamic connection from the NIC to the first target process. Dynamic connections with other target processes may subsequently be handled in similar fashion. | 09-04-2014 |
20140324939 | CROSS-CHANNEL NETWORK OPERATION OFFLOADING FOR COLLECTIVE OPERATIONS - A Network Interface (NI) includes a host interface, which is configured to receive from a host processor of a node one or more cross-channel work requests that are derived from an operation to be executed by the node. The NI includes a plurality of work queues for carrying out transport channels to one or more peer nodes over a network. The NI further includes control circuitry, which is configured to accept the cross-channel work requests via the host interface, and to execute the cross-channel work requests using the work queues by controlling an advance of at least a given work queue according to an advancing condition, which depends on a completion status of one or more other work queues, so as to carry out the operation. | 10-30-2014 |
20140379836 | OFFLOADING NODE CPU IN DISTRIBUTED REDUNDANT STORAGE SYSTEMS - A network interface includes a host interface for communicating with a node, and circuitry which is configured to communicate with one or more other nodes over a communication network so as to carry out, jointly with one or more other nodes, a redundant storage operation that includes a redundancy calculation, including performing the redundancy calculation on behalf of the node. | 12-25-2014 |
20150029853 | CONGESTION CONTROL ENFORCEMENT IN A VIRTUALIZED ENVIRONMENT - In a data network congestion control in a virtualized environment is enforced in packet flows to and from virtual machines in a host. A hypervisor and network interface hardware in the host are trusted components. Enforcement comprises estimating congestion states in the data network attributable to respective packet flows, recognizing a new packet that belongs to one of the data packet flows, and using one or more of the trusted components and to make a determination based on the congestion states that the new packet belongs to a congestion-producing packet flow. A congestion-control policy is applied by one or more of the trusted components to the new packet responsively to the determination. | 01-29-2015 |