Abstract:
Verfahren und Vorrichtung zur Operandenverarbeitung in einer Prozessoreinheit mit wenigstens zwei Ausführungseinheiten, welche in einem vorgebbaren Takt betreibbar sind, wobei die Ausführungseinheiten mit Steuersignalen zur Verarbeitung der Operanden angesteuert werden und zwischen einem ersten Betriebsmodus und einem zweiten Betriebsmodus umgeschaltet werden kann, dadurch gekennzeichnet, dass in dem ersten Betriebsmodus beiden Ausführungseinheiten gleiche Operanden zugeführt werden und in dem zweiten Betriebsmodus beiden Ausführungseinheiten unterschiedliche Operanden zugeführt werden und in dem ersten Betriebsmodus beide Ausführungseinheiten mit gleichen Steuersignalen zur Verarbeitung der Operanden angesteuert werden und im zweiten Betriebsmodus beide Ausführungseinheiten mit unterschiedlichen Steuersignalen zur Verarbeitung der Operanden angesteuert werden.
Abstract:
Prozessor mit mehreren RechenwerkenEin Prozessor umfaßt ein erstes Rechenwerk (2), ein zweites Rechenwerk (4) und eine Steuereinrichtung (6) zum Ansteuern der beiden Rechenwerke (2, 4) derart, daß diese wahlweise in einer komplementäre Daten verarbeitenden Hochsicherheitsbetriebsart oder in einer unabhängige Daten verarbeitenden Parallelbetriebsart oder in einer gleiche Daten verarbeitenden Sicherheitsbetriebsart arbeiten oder sich in einer Leistungssparbetriebsart befinden, in der eines der Rechenwerke (2, 4) abgeschaltet ist.
Abstract:
A bridge for a multi-processor system provides interfaces to an I/O bus of a first processing set, an I/O bus of a second processing set and a device bus. A bridge control mechanism arbitrates between the first and the second processing sets for access to each others I/O bus and to the device bus in a first, split, mode, an monitors lockstep operation of the first and second processing sets in a second, combined, mode. On detecting a lockstep error in the combined mode, the bridge transfers to an error mode. The bridge control mechanism buffers write accesses in a posted write buffer in the error mode pending resolution of the error.
Abstract:
A bridge for multi-processor system includes bus interfaces for connection to an I/O bus of a first processing set, an I/O bus of a second processing set and a device bus. A bridge control mechanism is operable to permit direct memory access to memory of the processing sets by a device on the device bus, to arbitrate between the first and the second processing sets for access to the bridge in a first, split, mode, and to monitor lockstep operation of the first and second processing sets in a second, combined, mode. The dirty RAM mechanism defines a dirty indicator (e.g., a bit) for each of a plurality of regions of processing set memory, a dirty indicator being set to a predetermined value when the region of memory has been written to by a DMA access. One of the processing sets can be operable in the split mode as a primary processing set to copy the content of its memory to the other processing set(s) and to recopy regions which become identified by the dirty RAM mechanism as having been written to by virtue of the corresponding dirty indication being set. In response to a synchronization reset operation from the primary processing set, on completion of copying the content of the memory regions identified in the dirty RAM mechanism with no further regions having being so identified, the bridge can transfer from the split mode to the combined mode.
Abstract:
System and method for transferring data between a host system and a data storage system is provided. The system includes an interface that uses a file based protocol to transfer data between the data storage system and the host system, wherein the data storage system includes a first mass storage device and a second mass storage device; wherein the first mass storage device is a solid state non-volatile memory device and the second mass storage device is a non-solid state memory device. The first mass storage device is a flash memory device that operates as a primary storage device that stores data on a file by file basis. The second mass storage device is a magnetic disk drive that operates as secondary storage device and stores data received via a logical interface.
Abstract:
The invention relates to a method and a device for generating a signal in a computer system comprising a plurality of components including at least two execution units and a switching means. It is possible to switch between at least two operating modes in said computer system, a first operating mode corresponding to a comparison mode and a second operating mode corresponding to a performance mode. The invention is characterised in that a mode signal indicating the current operating mode and/or changes in the mode signal are generated in one of the components of the computer system, and at least the changes in the mode signal and/or the mode signal itself are provided outside the component.
Abstract:
The invention relates to a method and to a device for synchronising in a multi-processor system comprising at least two processors and switching means which can be switched between at least two operational modes. The inventive device is embodied is such a manner that synchronisation is carried out by a stop signal which stops an advancing processor in order to synchronise the stop signal with the at least two processors.
Abstract:
The invention relates to a method and device for delaying accesses to data and/or commands of a multiprocessor system comprising a first and a second processor to both of which a memory unit is assigned. The second processor operates with a clock pulse offset, and the device is designed in such a manner that the first processor accesses the memory unit, and the second processor, with a clock pulse offset, receives the data and/or commands.
Abstract:
The invention relates to a method and a device for switching in a computer system comprising at least two execution units, switching means being provided for switching between at least two operating modes, a first operating mode corresponding to a comparison mode and a second operating mode corresponding to a performance mode. The invention is characterised by the fact that an interruption controller and at least three memory regions are provided, the access to the memory regions being carried out in such a way that a first memory region is associated with at least one first execution unit, a second memory region is associated with at least one second execution unit, and at least one third memory region can be associated with the at least two execution units.