Mellanox Technologies, Ltd.

Mellanox Technologies Tlv Ltd.

Niv Aibester

Liron Mula

Gil Levy

Barak Gafni

Aviv Kfir

George Elias

Eyal Srebro

Itamar Rabenstein

Benny Koren

Amir Roitshtein

Yuval Shpigelman

Sagi Kuks

Amit Kazimirsky

Idan Burstein

Lion Levi

Idan Matari

Nir Monovich

Amir Mizrahi

Shmuel Shichrur

Methods, systems, and computer program products to modulate telemetry data as a function to represent the performance of a network and/or individual devices connected to the network. In embodiments, the method includes receiving telemetry data that has been sampled at a given point of time, wherein the telemetry data is associated with a performance metric of a device; processing the telemetry data as a function representing performance of the network device, wherein processing the telemetry data comprises modulating the telemetry data at the given point of time to previously sampled telemetry data based on the function; and demodulating the modulated telemetry data. In embodiments, the method also includes transferring the modulated telemetry data for reporting.

Method and system to modulate telemetry data

A network device includes a memory and a memory management circuit. The memory is to store a shared buffer. The memory management circuit is to estimate respective bandwidth measures for one or more queues used in processing packets in the network device, and to allocate and deallocate segments of the shared buffer to at least one of the queues based on the bandwidth measures.

Queue bandwidth estimation for management of shared buffers and allowing visibility of shared buffer status

A networking device and system are described, among other things. An illustrative system is disclosed to include a shared buffer and at least a flow controller. In some embodiments, the system and/or flow controller may be configured to measure a packet flow's bandwidth consumption of the shared buffer, assign a flow-type attribute to the packet flow based on the packet flow's bandwidth consumption of the shared buffer, select a shared buffer schema for the packet flow based on the flow-type attribute assigned to the packet flow, and apply the selected shared buffer schema to the packet flow. For example, the flow-type attribute assigned to the packet flow may comprise a mice flow state or an elephant flow state, and a reserve attribute may be assigned to the flow based on the packet flow being assigned the mice flow state or the elephant flow state.

Mice-elephant aware shared buffer schema

A network device includes multiple ports, a Shared Buffer (SB) and a SB controller. The ports to connect to a communication network. The SB to temporarily store packets received from the communication network via the ports, the packets belonging to multiple flows. The SB controller to allocate one or more flow-specific storage regions in the SB, a given flow-specific storage region being allocated to store the packets that (i) belong to respective one or more of the flows and (ii) are to be transmitted via a respective egress queue. In response to detecting that an occupancy level in the given flow-specific storage region exceeds a specified occupancy threshold, the SB controller to report the flows in the given flow-specific storage region as congested.

Flow-based congestion control

A device includes one or more ports, one or more bandwidth shapers, and processing logic. The one or more ports are to connect to a communication network. A given bandwidth shaper is to: (i) when disabled, output traffic at an available full data rate, and (ii) when enabled, output the traffic at a specified shaper data rate lower than the available full data rate. The processing logic is to receive or generate notifications, which are indicative of average power that is consumed by the network device while outputting traffic through the one or more bandwidth shapers via the one or more ports, and based on at least some of the notifications, toggle at least one of the one or more bandwidth shapers between being enabled and disabled, to retain the average power consumed below a specified power budget.

Power consumption control by toggling bandwidth shapers

Apparatus for global policing of a bandwidth of a flow, the apparatus including a network device including a local policer configured to perform bandwidth policing on the flow within the network device, and a communications module configured to: send local policer state information from the local policer to a remote global policer, and receive policer state information from the remote global policer and update the local policer state information based on the remote global policer state information. Related apparatus and methods are also provided.

Global policers

A network device, a network interface controller, and a switch are provided. In one example, a shared buffer includes a plurality of cells of memory, one or more ports read data from the shared buffer and write data to the shared buffer, and a controller circuit selectively enables and disables cells of memory of the shared buffer based on an amount of data stored in the shared buffer. Power consumption of the shared buffer is in proportion to a number of enabled cells of memory.

Power-optimized and shared buffer

A device includes ports, a packet processor, and a memory management circuit. The ports communicate packets over a network. The packet processor processes the packets using queues. The memory management circuit maintains a shared buffer in a memory and adaptively allocates memory resources from the shared buffer to the queues, maintains in the memory, in addition to the shared buffer, a shared-reserve memory pool for use by the queues, identifies, among the queues, a queue that requires additional memory resources, the queue having an occupancy that is (i) above a current value of a dynamic threshold, rendering the queue ineligible for additional allocation from the shared buffer, and (ii) no more than a defined margin above the current value of the dynamic threshold, rendering the queue eligible for allocation from the shared-reserve memory pool, and allocates memory resources to the identified queue from the shared-reserve memory pool.

Allocation of shared reserve memory

A network device includes one or more ports, a packet processor, and a memory management circuit. The one or more ports are to communicate packets over a network. The packet processor is to process the packets using a plurality of queues. The memory management circuit is to maintain a shared buffer in a memory and adaptively allocate memory resources from the shared buffer to the queues, to maintain in the memory, in addition to the shared buffer, a shared-reserve memory pool for use by a defined subset of the queues, to identify in the subset a queue that (i) requires additional memory resources, (ii) is not eligible for additional allocation from the shared buffer, and (iii) meets an eligibility condition for the shared-reserve memory pool, and to allocate memory resources to the identified queue from the shared-reserve memory pool.

Allocation of shared reserve memory to queues in a network device

A network-connected device includes at least one communication port, packet processing circuitry and Diagnostics Direct Memory Access (DMA) Circuitry (DDC). The at least one communication port is configured to communicate packets over a network. The packet processing circuitry is configured to receive, buffer, process and transmit the packets. The DDC is configured to receive a definition of (i) one or more diagnostic events, and (ii) for each diagnostic event, a corresponding list of diagnostic data that is generated in the packet processing circuitry and that pertains to the diagnostic event, and, responsively to occurrence of a diagnostic event, to gather the corresponding list of diagnostic data from the packet processing circuitry.

Direct memory access (DMA) engine for diagnostic data

A network element includes circuitry and multiple ports. The multiple ports are configured to connect to a communication network. The circuitry is configured to receive via one of the ports a packet that originated from a source node and is destined to a destination node, the packet including a mark that is indicative of a cumulative state derived from at least bandwidth utilization conditions of output ports that were traversed by the packet along a path, from the source node up to the network element, to select a port for forwarding the packet toward the destination node, to update the mark of the packet based at least on a value of the mark in the received packet and on a local bandwidth utilization condition of the selected port, and to transmit the packet having the updated mark to the destination node via the selected port.

Explicit notification of operative conditions along a network path

A network device includes multiple ports, multiple buffer slices, a controller, and buffer control circuitry. The multiple ports are configured to communicate packets over a network. The multiple buffer slices are linked respectively to the multiple ports. The controller is configured to allocate a group of two or more of the buffer slices to a selected port among the ports. The buffer control circuitry is configured to buffer the packets, communicated via the selected port, in the group of the buffer slices, using zero-copy buffering.

Zero-copy buffering of traffic of long-haul links

Apparatus for global policing of a bandwidth of a flow, the apparatus including a network device including a local policer configured to perform bandwidth policing on the flow within the network device, and a communications module configured to: send local policer state information from the local policer to a remote global policer, and receive policer state information from the remote global policer and update the local policer state information based on the remote global policer state information, Related apparatus and methods are also provided.

A network element includes multiple ports configured to communicate over a network, a buffer memory, a snapshot memory, and circuitry. The circuitry is configured to forward packets between the ports, to temporarily store information associated with the packets in the buffer memory, to continuously write at least part of the information to the snapshot memory concurrently with storage of the information in the buffer memory, and, in response to at least one predefined diagnostic event, to stop writing of the information to the snapshot memory, so as to create in the snapshot memory a coherent snapshot corresponding to a time of the diagnostic event.

Coherent capturing of shared-buffer status

A parsing apparatus includes an interface, a first parser, a second parser and a controller. The interface is configured to receive packets belonging to a plurality of predefined packet types. The first parser is configured to identify any of the packet types. The second parser is configured to identify only a partial subset of the packet types. The controller is configured to receive a packet via the interface, to attempt identifying a packet type of the received packet using the second parser, and in response to detecting that identifying the packet type using the second parser fails, to revert to identify the packet type of the received packet using the first parser.

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Herzliya, Israel

Niv Aibester