Abstract: A method for processing data in a computer system using two main concepts for addressing this situation, from which numerous other implementations is achieved using a first and second main concept. The first is a method of managing a common data path among a plethora of facilities with a decentralized distributed management scheme. The second concept is a method for managing a shared data buffer or group of buffers between multitudes of facilities. By employing the concepts discussed in this invention, one can contemplate a complex dataflow consisting of a multiplicity of resources and data paths, whereby virtually any combination of sharing is possible. A single data path can be shared among multiple sources or sinks.

Abstract: A modular multiprocessor computer system having a plurality of nodes each being in communication with each other via communication links. The plurality of nodes each have local memory and local cache accessible by the other nodes. The plurality of nodes each also having a cache directory, one or more processing units, and a memory coherent directory to keep track of the scope of ownership of data within the modular multiprocessing computer system. The local memory and the local cache contain configurable regions of storage, wherein memory coherency traffic on the communication links between the nodes is controlled through the use of the memory coherent directory during a data request.

Abstract: A modular multiprocessor computer system having a plurality of nodes each being in communication with each other via communication links. The plurality of nodes each have local memory and local cache accessible by the other nodes. The plurality of nodes each also having a cache directory, one or more processing units, and a memory coherent directory to keep track of the scope of ownership of data within the modular multiprocessing computer system. The local memory and the local cache contain configurable regions of storage, wherein memory coherency traffic on the communication links between the nodes is controlled through the use of the memory coherent directory during a data request.

Abstract: A method for processing data in a computer system using two main concepts for addressing this situation, from which numerous other implementations is achieved using a first and second main concept. The first is a method of managing a common data path among a plethora of facilities with a decentralized distributed management scheme. The second concept is a method for managing a shared data buffer or group of buffers between multitudes of facilities. By employing the concepts discussed in this invention, one can contemplate a complex dataflow consisting of a multiplicity of resources and data paths, whereby virtually any combination of sharing is possible. A single data path can be shared among multiple sources or sinks.

Abstract: A method and an apparatus are disclosed for converting error syndromes of an error-correcting code to pointers which identify the positions of the erroneous bits. Each syndrome is converted by a plurality of hashing functions into a plurality of hash words, which in turn are used to address a plurality of read-only stores. The outputs of the read-only stores are logically combined to obtain the respective error pointer. A preferred embodiment uses three hashing functions (41, 43, 45) and three read-only stores (53, 55, 57) and combines their outputs by an Exclusive-Or function (59). The storage capacity and the processing time required for syndrome-to-error pointer conversion are reduced by the disclosed scheme.