33 results about "HyperTransport" patented technology

A packetized I/O link such as the HyperTransport protocol is adapted to transport memory coherency transactions over the link to support cache coherency in distributed shared memory systems. The I/O link protocol is adapted to include additional virtual channels that can carry command packets for coherency transactions over the link in a format that is acceptable to the I/O protocol. The coherency transactions support cache coherency between processing nodes interconnected by the link. Each processing node may include processing resources that themselves share memory, such as symmetrical multiprocessor configuration. In this case, coherency will have to be maintained both at the intranode level as well as the internode level. A remote line directory is maintained by each processing node so that it can track the state and location of all of the lines from its local memory that have been provided to other remote nodes. A node controller initiates transactions over the link in response to local transactions initiated within itself, and initiates transactions over the link based on local transactions initiated within itself. Flow control is provided for each of the coherency virtual channels either by software through credits or through a buffer free command packet that is sent to a source node by a target node indicating the availability of virtual channel buffering for that channel.

A data path protocol eliminates most of the conventional read transactions required to transfer data between devices interconnected by a split transaction bus, such as a HyperTransport (HPT) bus. To that end, each device is configured to manage its own set of buffer descriptors, unlike previous data path protocols in which only one device managed all the buffer descriptors. As such, neither device has to perform a read transaction to retrieve a “free” buffer descriptor from the other device. As a result, only write transactions are performed for transferring descriptors across the HPT bus, thereby decreasing the amount of traffic over the bus and eliminating conventional latencies associated with read transactions. In addition, because descriptors are separately managed in each device, the data path protocol also conserves processing bandwidth that is traditionally consumed by managing ownership of the buffer descriptors within a single device.

A technique and mechanism for reducing memory latency asymmetry in a multiprocessor system by replacing one (or more) processors with a bypass or pass-through device. Using the pass-through mechanism, the reduced number of processors in the system enables all of the remaining processors to connect to each other directly using the interconnect links. The reduction in processor count improves symmetry and reduces overall latency thereby potentially improving performance of certain applications despite having fewer processors. In one specific implementation, the pass through device is used to connect two HyperTransport links together where each of the links is connected to a processor at the other end.

The present invention provides a technique for ordering responses received over a split transaction bus, such as a HyperTransport bus (HPT). When multiple non-posted requests are sequentially issued over the split transaction bus, control logic is used to assign each request an identifying (ID) number, e.g. up to a maximum number of outstanding requests. Similarly, each response received over the split transaction bus is assigned the same ID number as its corresponding request. Accordingly, a “response memory” comprises a unique memory block for every possible ID number, and the control logic directs a received response to its corresponding memory block. The responses are extracted from blocks of response memory in accordance with a predetermined set of ordering rules. For example, the responses may be accessed in the same order the corresponding non-posted requests were issued.

A dual mode digital interface supports the HyperTransport Standard and at least one other interface standard. The dual mode digital interface includes a physical interface, a plurality of data line amplifiers, a clock line amplifier, a plurality of data line deskew/sampling blocks, a data group deskew module, and an enablement control module. The plurality of data line deskew/sampling blocks deskew and sample incoming data on respective data lines based upon a clock signal to produce deskewed data. The data group deskew module receives deskewed data from each of the plurality of data line deskew/sampling blocks and removes inter data line skew from the deskewed data to produce received data. The plurality of data line deskew/sampling blocks and the data group deskew module may be set based upon a training sequence received from a link partner. The training sequence may received during startup or reset, immediately after startup or reset completes, or may be received periodically during training intervals.

Disclosed are a data processing system and a method of isolating a plurality of input/output adapter units of that system. The data processing system comprises, in addition to the input/output adapter units, a set of processors, a host bridge, and a system bus connecting the set of processors and the host bridge. Each of the input/output adapter units has a respective identifier; and the set of processors send commands to the host bridge, said commands including one or more of the identifiers of the input/output adapter units. In the preferred embodiment, these identifiers are HyperTransport defined Unit IDs, and the commands issued by the set of processors include a Unit ID field including one or more of the Unit IDs of input/output adapters.

A multi-socket circuit board chip bridging device is proposed, which is designed for use in conjunction with a multi-socket circuit board having multiple sockets and utilizing a special type of bus architecture, such as the HT (HyperTransport) bus architecture, for use to be mounted on a selected one of the sockets for the purpose of connecting one chip mounted on a first socket to another chip mounted on a second socket on the multi-socket circuit board. This feature allows manufacturer to utilize just one kind of circuit board for the implementation of a variety of multi-processor computer motherboards or hardware platforms having different number of processors, without having to design different types of multi-processor computer motherboards, thus representing a more cost-effective solution to the manufacture of multi-processor computer motherboards than prior art.

The invention discloses a message passing interface framework for supporting bus communication, which comprises a byte transfer layer (BTL) in a basic framework of Open MPI open source software, a byte management layer (BML), a point-to-point messaging layer (PML), an MPI application program interface (MPI API), a memory pool (Mpool) and a registration cache (Rcache). The framework also comprises an HT bus communication module (HT BTL) added based on the framework and a called corresponding memory pool (Mpool) in an Open MPI architecture; and communication can be performed in the same or different operating systems of a main board and between different main boards by collocating the priority of an HT BTL module. A Hypertransport bus communication protocol is integrated into the Open MPI architecture by combining a system calling interface provided by the Hypertransport bus communication protocol according to a standard interface provided by the Open MPI open source software. Meanwhile, during MPI process communication, a network using the Hypertransport bus communication protocol has higher priority than other networks. The message passing interface framework for supporting bus communication is innovated based on the conventional mature technology, is simple and convenient to implement, and has good use and development prospect.

An indicator pin of an input/output controller is used to identifying whether a processor or a bridge is configured in a processor. When a predetermined voltage level of the indicator pin is confirmed, a base input/output system of the computer system renews a coherent/non-coherent HyperTransport link table. Then an initialization procedure is performed in accordance with the renewed coherent/non-coherent HyperTransport link table.

A system for synchronizing configuration information in a plurality of data processing devices using a common system interconnect bus. The present invention provides a method and apparatus for enforcing automatic updates to the configuration registers in various agents in the data processing system. The interface agent are not required to have target/response logic to respond to internal and external configuration accesses. In and embodiment of the present invention, a node controller, which may comprise a configuration block, is operably connected to a system interconnect bus and a switch. A plurality of interface agents are connected to the switch, with each of the interface agents comprising a configuration space register, a configuration space shadow register and a control and status register (CSR). A token ring connected to the node controller is operable to transmit data from the node controller to a plurality of interface agents connected to the token ring, thereby providing a system for updating the various configuration registers in each of the agents. A transaction from an interface agent is transferred to the node controller which transfers the transaction onto the system interconnect bus. The transaction on the system interconnected bus is detected by the configuration block of the node controller and is then transmitted on the token ring to each of the agents connected thereto. The information transmitted on the token ring is used to update the information in the configuration space registers and configuration space shadow registers of each of the agents connected to the token ring. In an embodiment of the invention the interface agents are configured in accordance with the Hypertransport protocol. In this embodiment, the configuration comprises a HT configuration space register and the configuration space shadow register comprise a HT configuration space shadow register.

In accordance with the present invention a system for detecting transaction errors in a system comprising a plurality of data processing devices using a common system interconnect bus, comprises a node controller operably connected to said system interconnect bus and a plurality of interface agents communicatively coupled to said node controller. Error corresponding to transactions between said interface agents and other processing modules in said system are directed to said node controller; and wherein transaction errors that would not normally be communicated to said system interconnect bus are communicated by said node controller to said system interconnect bus to be available for detection. In an embodiment of the present invention, the interface agents operate in accordance with the hypertransport protocol. A system control and debug unit and a trace cache operably connected to the system bus can be used to diagnose and store errors conditions.

Methods, apparatus, and computer program products are described for resetting a HyperTransport link in a blade server, including reassigning, by a blade management module, a gate signal from enabling a transceiver to signaling a HyperTransport link reset; sending, by the blade management module to a reset sync module on an out-of-band bus, the gate signal; and in response to the gate signal, sending, by the reset sync module to the blade processor, HyperTransport reset signals. The HyperTransport link includes a bidirectional, serial/parallel, high-bandwidth, low-latency, point to point data communications link. The blade server includes the blade processor, the reset sync module, and the baseboard management controller. The blade server is installed in the blade center. The blade center includes the blade management module. The blade management module is coupled to the baseboard management controller by the blade communication bus.

An interconnect structure between HyperTransport bus interface boards, for interconnecting corresponding HyperTransport bus interfaces disposed on different Printed Circuit Boards (PCBs) via a connector. The connector cuts across a HyperTransport bus, and terminals of two HyperTransport bus interfaces on different PCBs connected via the connector are connected with each other correspondingly via connecting lines sequentially distributed, so as to avoid the intercross of the connecting lines. The present invention may solve the problem of intercrossing of signals on the HyperTransport bus between processors or other chips during inter-board connecting without the increase of PCB layer number or the degradation of signal quality and the additional cost.

A computer system comprises a main board equipped with a HT device. The HT interface comprises a first connector and a riser card. The first connector is compatible with HT Device-Under-Test (HT-DUT) specifications and electrically connected onto the main board. The riser card, inserted onto the main board, includes a second connector compatible with HT-DUT specifications and a third connector compatible with HT expansion (HTX) specifications. The first connector and the second connector are electrically connected for data transmission. Therefore, the main board equipped with both the HT-DUT connector and the HTX connector achieves smaller on-board space and fewer on-board connection interfaces.

Systems and methods are provided for a hardware access tool to access a computer input/output (I/O) device coupled to a standard I/O bus on a host computer system. Upon receiving a standard I/O bus command, the hardware access tool translates the bus command on-the-fly for operation on a selected I/O device. The hardware access tool includes a bootable operating system for use when operating the invention, thus avoiding possible corruption of any existing host operating system. Accessing an input/output device may be for testing, debugging, developing, programming, configuring, or any other reason for accessing an I/O device. The hardware access tool may operate with standard I/O bus architectures such as PCI, CompactPCI, PMC, PCI-X, PCI Express, InfiniBand, HyperTransport, PC CardBus, PCMCIA, AGP, USB, ExpressCard, and IEEE 1394.

A design structure embodied in a machine readable storage medium for designing, manufacturing, and/or testing a design is described for resetting a HyperTransport link in a blade server, including reassigning, by a blade management module, a gate signal from enabling a transceiver to signaling a HyperTransport link reset; sending, by the blade management module to a reset sync module on an out-of-band bus, the gate signal; and in response to the gate signal, sending, by the reset sync module to the blade processor, HyperTransport reset signals. The HyperTransport link includes a bidirectional, serial/parallel, high-bandwidth, low-latency, point to point data communications link. The blade server includes the blade processor, the reset sync module, and the baseboard management controller. The blade server is installed in the blade center. The blade center includes the blade management module. The blade management module is coupled to the baseboard management controller by the blade communication bus.

The invention provides a transmission method and device of high-speed cache consistency information. The method comprises the steps that according to a HyperTransport protocol, reading orders used in high-speed cache consistency information transmission of a NONPOST channel of the HyperTransport protocol are determined, a POST channel is used for transmitting writing orders in the high-speed cache consistency information, a RESPONSE channel is used for transmitting reading responses in the high-speed cache consistency information, and a newly-added BRESPONSE channel is used for transmitting writing responses in the high-speed cache consistency information; and at least one kind of the reading orders, the writing orders, the reading responses and the writing responses are transmitted on a corresponding channel of the HyperTransport protocol. According to the technical scheme, blocking of the reading responses and the writing responses on a transmission channel is avoided, and the transmission efficiency of the reading responses and the writing responses is improved.

The invention discloses an E-plane bending rectangular waveguide adjustable filter based on a hypertransport membrane. The adjustable filter mainly solves the problem of small adjustment quantity of passband bandwidth of the existing waveguide adjustable filter. The adjustable filter comprises rectangular waveguides (1) and the hypertransport membrane (2), wherein the rectangular waveguides (1) are in E-plane bending structures; two rectangular flange plates are arranged at bending parts; two strip-type through holes (21) and (22) which are parallel are formed in upper and lower positions of the hypertransport membrane (2); a C-shaped gap (23) is arranged in the middle of the hypertransport membrane (2); an opening of the C-shaped gap (23) faces towards inner bending sides of the waveguides; and the hypertransport membrane (2) is fixed between the two rectangular flange plates of the rectangular waveguides (1), and slides along inner and outer bending sides of the waveguides in the two strip-type through holes (21) and (22) to adjust a position of the C-shaped gap (23) and realize continuous adjustment of passband bandwidth. The adjustable filter has the advantages of large adjustment quantity of the passband bandwidth and simple structure, and can be used in the field of microwave communication.