129 results about "Interprocessor communication" patented technology

A communications passthrough mechanism for high availability network communications between a shared system resource and clients of the system resource. The system resource includes a control/processing sub-system including multiple peer blade processors. A port of each blade processor is connected to each client/server network path and each client is connected to a corresponding port of each blade processor. Each blade processor includes a network fault detector exchanging beacon transmissions with other blade processors through corresponding blade processor ports and network paths. Each blade processor includes response generator responsive to a failure to receive a beacon transmission from a failed port of an other blade processor for redirecting the client communications to the failed port on the other blade processor to the corresponding port of the blade processor. A path manager in the blade processor is responsive to operation of the response generator for modifying the communications routing table to correspond with the redirection message to route the client communications to the failed port of the other blade processor to the other blade processor through the inter-processor communications link. Each blade processor may also include an inter-blade communications monitor for detecting a failure in the inter-processor communications link between the blade processor and another blade processor, reading the communications routing table to select a functional network communications path to a port of the other blade processor, and modifying the communications routing table to redirect inter-processor communications to the selected functional network communications path.

A device and a method are provided for increasing processing speed and for ensuring system security when an application or a driver is added. The device includes a first CPU group 10A that executes software 20A composed of basic processing 22 and an OS 21A; a second CPU group 10B that executes software 20B composed of additional processing 23 and OS 21B corresponding to the additional processing, inter-processor communication means 40, and 402 used for communication between the first CPU 10A and the second CPU 10B, and access control means 30 that controls access made by the second CPU 10B to a memory 50 and/or an input/output device 60.

A message based power management approach is utilized to provide power management for a multi-processor system. A power management message is received at one processor of the multi-processor system over an input/output communication link that provides input/output access for the processors of the multi-processor system. The power management message includes a power management field encoding a power management state for processors of the multi-processor system. The processor that received the power management message over the input/output communication link sends a power management message to other processors in the multi-processor system over one or more inter-processor communication links encoding the power management state.

A portable electronic device (110) is capable of secure inter-processor communications (160) between processors (120, 130). The processors have unique and unalterable device identifiers used to encrypt session key data using shared secrets. A first processor device identifier is encrypted by a first processor (120) and decrypted by a second processor (130) and compared against a known device identifier to verify authenticity. Then the second processor (130) likewise encrypts and the first processor (120) likewise decrypts and likewise compares device identity to verify authenticity.

In a data processing system of the type having multiple processor units coupled to one another by a bus means for interprocessor communications there is provided a fiber optic interconnection system to interconnect the bus means of multiple processor sections to one another, thereby allowing groups of the processor units to be physically spaced from one another. The fiber optic interconnect system includes, for each multiprocessor unit section functions to receive messages communicated on the interprocessor bus of that section for receipt by a destination processor of the other section, format the message for fiber optic transmission, and transmit the message; and circuitry for receiving messages on the fiber optic link, scheduling the message for transmission to the destination processor, and maintaining that scheduling in the face of receipt of another message for the same processor unit. The fiber optic interconnect system includes means for configuring the system to identify which processor units are in which section and, when more than two sections are interconnected by the fiber optic link, provide information as to the shortest route to the destination processor from a section.

A multi-processor arrangement having an interprocessor communication path between each of every possible pair of processors, in addition to I/O paths to and from the arrangement, having signal processing functions configurably embedded in series with the communication paths and/or the I/O paths. Each processor is provided with a local memory which can be accessed by the local processor as well as by the other processors via the communications paths. This allows for efficient data movement from one processor's local memory to another processor's local memory, such as commonly done during signal processing corner turning operations. The configurable signal processing logic may be configured to host one or more signal processing functions to allow data to be processed prior to its deposit into local memory.

A fault-tolerant RAID system is disclosed. The system includes redundant RAID controllers coupled by a PCI-Express link. When a PCI-Express controller of one of the RAID controllers receives a PCI-Express memory write request transaction layer packet (TLP), it interprets a predetermined bit in the header as an interrupt request flag, rather than as its standard function specified by the PCI-Express specification. If the flag is set, the PCI-Express controller interrupts the processor after storing the message in the payload at the specified memory location. In one embodiment, an unused upper address bit in the header is used as the interrupt request flag. Additionally, unused predetermined bits in the TLP header are used as a message tag to indicate one of a plurality of message buffers on the receiving RAID controller into which the message has been written. The PCI-Express controller sets a corresponding bit in a register to indicate which message buffer was written.

Methods and apparatus for an inter-processor communication (IPC) link between two (or more) independently operable processors. In one aspect, the IPC protocol is based on a “shared” memory interface for run-time processing (i.e., the independently operable processors each share (either virtually or physically) a common memory interface). In another aspect, the IPC communication link is configured to support a host driven boot protocol used during a boot sequence to establish a basic communication path between the peripheral and the host processors. Various other embodiments described herein include sleep procedures (as defined separately for the host and peripheral processors), and error handling.

An integrated circuit with selectable input/output includes a first processor configured to execute instructions, an input/output interface configured to receive and transmit standard input/output communications, an inter-processor interface configured to process interprocessor communications with a second processor, and selection circuitry coupled to both the input/output interface and the inter-processor interface and configured to select between the input/output interface and the inter-processor interface.

To facilitate inter-processor communication between multiple processors in a computer system and to enable the accessing of a dual port memory, or other system resources, without requiring the memory or the data/address bus to be locked, the present invention provides a semaphore unit that preferably incorporates a shared mailbox architecture that, in combination with a set of hardware semaphore registers, enables inter-process communication among the multi-processors. Cooperative multitasking may be accomplished through the use of shared mailbox communication protocols while a preemptive multitasking may be accomplished through the use of hardware semaphore registers.

Processing within a multiprocessor computer system is facilitated by: setting, in association with invalidate page table entry processing, a storage key at a matching location in central storage of a multiprocessor computer system to a predefined value; and subsequently executing a request to update the storage key to a new storage key, the subsequently executing including determining whether the predefined value is an allowed stale value, and if so, replacing in central storage the storage key of predefined value with the new storage key without requiring purging or updating of the storage key in any local processor cache of the multiprocessor computer system, thus minimizing interprocessor communication pursuant to processing of the request to update the storage key to the new storage key.

A storage includes: host interface units; file control processors which receives a file input/output request and translates the file input/output request into a data input/output request; file control memories which store translation control data; groups of disk drives; disk control processors; disk interface units which connect the groups of disk drives and the disk control processors; cache memories; and inter-processor communication units. The storage logically partitions these devices to cause the partitioned devices to operate as two or more virtual NASs.

Certain embodiments of the present invention arc directed to providing efficient and easily-applied mechanisms for inter-core and inter-processor communications and inter-core and inter-processor signaling within multi-core microprocessors and certain multi-processor systems. In one embodiment of the present invention, local advanced programmable interrupt controllers within, or associated with, cores of a multi-core microprocessor and/or processors of a multi-processor system are enhanced so that the local advanced programmable interrupt controllers can be configured to automatically generate inter-core and inter-processor interrupts when WRITE operations are directed to particular regions of shared memory.

On a parallel processing system by an OS for single processors which operates, on a multiprocessor, an OS for single processors and an existing application to realize parallel processing by the multiprocessor with respect to the application, each processor includes a communication proxy unit which transfers data between tasks spreading over the processors by proxy and the communication proxy unit on a processor in which a task on a transmission side operates holds information about an address, on a processor, of a task on a reception side to receive data transferred from the task on the transmission side as proxy for the task on the reception side.

An external memory based FIFO (xFIFO) apparatus coupled to an external memory and a register bus is disclosed. The xFIFO apparatus includes an xFIFO engine, a wDMA engine, an rDMA engine, a first virtual FIFO, and a second virtual FIFO. The xFIFO engine receives a FIFO command from the register bus and generates a writing DMA command and a reading DMA command. The wDMA engine receives the writing DMA command from the xFIFO engine and forwards an incoming data to the external memory. The rDMA engine receives the reading DMA command from the xFIFO engine and pre-fetches a FIFO data from the external memory. The wDMA engine and the rDMA engine synchronize with each other via the first virtual FIFO and the second virtual FIFO.

Processing within a multiprocessor computer system is facilitated by: deciding by a processor, pursuant to processing of a request to update a previous storage key to a new storage key, whether to purge the previous storage key from, or update the previous storage key in, local processor cache of the multiprocessor computer system. The deciding includes comparing a bit value(s) of one or more required components of the previous storage key to respective predefined allowed stale value(s) for the required component(s), and leaving the previous storage key in local processor cache if the bit value(s) of the required component(s) in the previous storage key equals the respective predefined allowed stale value(s) for the required component(s). By selectively leaving the previous storage key in local processor cache, interprocessor communication pursuant to processing of the request to update the previous storage key to the new storage key is minimized.

An apparatus and method for a redundancy control in duplex switch boards in a high speed network system are provided. The apparatus includes: a switching unit for switching data inputted one of the duplex switch boards to a destination line card; a state controlling unit for controlling a clock state of an opponent switch board between the duplex switch boards; an IPC controlling unit for controlling an inter processor communication (IPC) of a platform of the communication network system; a processing unit for controlling the IPC controlling unit and the state controlling unit of the duplex switch boards; and a clock controlling unit for synchronizing a clock between the duplex switch boards.

Systems and methods automatically design a system's architecture by modeling the architectural complexity of large-scale distributed systems to drive a partitioning and allocation algorithm. The result is a configuration based on the structure of the software tasks and data access, and the capacities of the hardware. Coupling and cohesion are relative, dependent on the ratio of load to capacity, and not independent software characteristics. The partitioning and allocation algorithm includes tradeoffs between processor utilization, memory utilization, inter-processor communication, and peripheral contention. The systems and methods take into account both precedence constraints and the directional flow of data. Further aspects include interleaving the decisions of database segmentation and software distribution. This approach is demonstrated with a simplified example of a real distributed system.

In shared-memory computer systems, threads may communicate with one another using shared memory. A receiving thread may poll a message target location repeatedly to detect the delivery of a message. Such polling may cause excessive cache coherency traffic and/or congestion on various system buses and/or other interconnects. A method for inter-processor communication may reduce such bus traffic by reducing the number of reads performed and/or the number of cache coherency messages necessary to pass messages. The method may include a thread reading the value of a message target location once, and determining that this value has been modified by detecting inter-processor messages, such as cache coherence messages, indicative of such modification. In systems that support transactional memory, a thread may use transactional memory primitives to detect the cache coherence messages. This may be done by starting a transaction, reading the target memory location, and spinning until the transaction is aborted.