Abstract: A computer system having a main unit and an expansion unit connected by an interface arrangement. The expansion unit includes at least one connector for receiving an input/output component, so that additional input/output components can be added to the computer system. The interface arrangement includes at least one cache controller and at least one cache memory for monitoring and predicting requests exchanged between the main unit and the expansion unit. A method of caching and processing input/output requests and a storage medium is also provided.

Abstract: The present invention provides a method and system for providing multi-level memory protection. The method includes defining a hierarchy of one or more parent process and their respective child processes. The method further includes building a data structure for defining access rights of each of the parent process and their respective child processes in the defined hierarchy.

Abstract: Decompressing a matrix having a plurality of redundant matrix rows by reading selected matrix rows including at least all non-redundant matrix rows of the matrix from a memory and computing remaining matrix rows of the matrix from the read matrix rows, wherein several matrix rows are computed simultaneously. The read and the computed remaining matrix rows are provided as the decompressed matrix to an output matrix register.

Abstract: A method for monitoring data congestion in a computer network with multiple nodes and for controlling data transmission in the computer network. The method includes generating a congestion notification by the node which detects a data congestion and transmitting the congestion notification to the data source which is involved in the data congestion. The method also includes generating in the data source a congestion value which indicates how severe the data congestion is, and storing in a worst case array of the data source those congestion values which indicate the most severe data congestions.

Abstract: A method for monitoring data congestion in a computer network with multiple nodes and for controlling data transmission in the computer network. The method includes generating a congestion notification by the node which detects a data congestion and transmitting the congestion notification to the data source which is involved in the data congestion. The method also includes generating in the data source a congestion value which indicates how severe the data congestion is, and storing in a worst case array of the data source those congestion values which indicate the most severe data congestions.

Abstract: A computer system having a main unit and an expansion unit connected by an interface arrangement. The expansion unit includes at least one connector for receiving an input/output component, so that additional input/output components can be added to the computer system. The interface arrangement includes at least one cache controller and at least one cache memory for monitoring and predicting requests exchanged between the main unit and the expansion unit. A method of caching and processing input/output requests and a storage medium is also provided.

Abstract: A method and system for managing flow of a plurality of packets in a lossless communication network interconnected by a plurality of switching-nodes is provided. The method includes creating a plurality of virtual-queues. Each virtual-queue corresponds to an output port of a switching-node. Thereafter, each packet is assigned to a virtual-queue. A packet is assigned to a virtual-queue based on information stored in a header of the packet.

Abstract: The present invention provides a method and system for providing multi-level memory protection. The method includes defining a hierarchy of one or more parent process and their respective child processes. The method further includes building a data structure for defining access rights of each of the parent process and their respective child processes in the defined hierarchy.