Graphcore Limited

Kabushiki Kaisha Toshiba

Toshiba Memory Corporation

Hachem Yassine

Graham Bernard Cunningham

Simon Christian Knowles

Daniel John Pelham Wilkinson

Richard Luke Southwell Osborne

Lars Paul Huse

Justin Coon

Daniel Wilkinson

A network comprising interconnected first and second processors, each processor comprising one or more of: multiple processing units arranged on a chip configured to execute program code; an on-chip interconnect comprising groups of exchange paths connected to receive data from corresponding groups of the processing units; external interfaces configured to communicate data off-chip as packets, each having a destination address, external interfaces of the first and second processors being connected by an external link; multiple exchange blocks, each connected to groups of the exchange paths; a routing bus configured to route packets between the exchange blocks and the external interfaces. Processing units of the first processor generate off-chip packets such that the group of processing units serviced by the first exchange block on the first processor address off-chip packets to the group of processing units on the second processor serviced by the corresponding first exchange block of the second processor.

Networked computer with multiple embedded rings

A hardware module comprises at least a first ingress buffer and a second ingress buffer, where the second ingress buffer holds data packets from a plurality of source components. To ensure fairness between one or more sources providing data to the first ingress buffer and the plurality of sources providing data to the second ingress buffer, processing circuitry examines source identifiers in packets held in the second ingress buffer and selects between the buffers so as to arbitrate between the sources. In some embodiments, the examination of the source identifiers provides statistics for a weighted round robin between the ingress buffers. In other embodiments, the source identifier of whichever packet is currently at the head of the second ingress buffer is used to perform a simple round robin between the sources.

Fair arbitration between multiple sources targeting a destination

A processor in a network has a plurality of processing units arranged on a chip. An on-chip interconnect enables data to be exchanged between the processing units. A plurality of external interfaces are configured to communicate data off chip in the form of packets, each packet having a destination address identifying a destination of the packet. The external interfaces are connected to respective additional connected processors. A routing bus routes packets between the processing units and the external interfaces. A routing register defines a routing domain for the processor, the routing domain comprising one or more of the additional processor, and at least a subset of further additional processors of the network, wherein the additional processors of the subset are directly or indirectly connected to the processor. The routing domain can be modified by changing the contents of the routing register as a sliding window domain.

Routing in a network of processors

A processor comprises a plurality of processing units on an integrated circuit interconnected by an exchange. The exchange has a group of exchange paths extending between first and second portions of the integrated circuit. Each group has a first exchange block in the first portion and a second exchange block in the second portion. The processor has a first external interface in the first portion a second external interface in the second portion and a routing bus which routes packets between the external interfaces and the exchange blocks. The first external interface exchanges packets between the integrated circuit and a host. The second interface exchanges packets between the integrated circuit and another integrated circuit. Errors may be trapped when packets are wrongly addressed. A network of such processors is also provided.

Host connected computer network

A method performed in a computing device. The computing device is configured to store data and retrieve stored data from storage. The computing device further stores parameters for use in soft decoding stored data. The method comprises retrieving data from storage using soft decoding based on the stored soft decoding parameters, using retrieved, soft decoded data to estimate updates of one or more of the parameters for soft decoding and storing the updates.

Joint soft boundaries and LLRS update for flash memory

There is provided a memory device comprising a plurality of memory cells and a controller configured to receive data to be stored in a set of memory cells and map a first portion of the data to a selection of memory cells to be programmed from the set of memory cells, wherein the number of cells to be programmed k is less than number of cells in the set n. The controller is further configured to map a second portion of the data to a plurality of voltage levels to be programmed into the memory cells to be programmed and store the first and second portions of the data in the set of memory cells by programming each memory cell of the selection of memory cells to be programmed to a respective voltage level of the plurality of voltage levels.

Growing community of inventors

Bristol, United Kingdom

Hachem Yassine