Mangosoft Corporation

Silicon Graphics, Incorporated

University of Utah Research Foundation

John B Carter

Steven J Frank

Scott H Davis

Daniel J Dietterich

Robert S Phillips

Hsin H Lee

Lixin Zhang

David G Porter

Randal Steven Passint

William Abraham

Donglai Dai

Liqun Cheng

Naveen Muralimanohar

Steven C Miller

Martin M Deneroff

Gregory Michael Thorson

Rajeev Balasubramonian

Curt F Schimmel

Thomas G Hansen

John Woods

Karthik Ramani

Zhen Fang

Michael Parker

A method for utilizing heterogeneous interconnects comprising wires of varying latency, bandwidth and energy characteristics to improve performance and reduce energy consumption by dynamically routing traffic in a processor environment.

Microarchitectural wire management for performance and power in partitioned architectures

A method and apparatus for controlling access by a set of accessing nodes to memory of a home node (in a multimode computer system) determines that each node in the set of nodes has accessed the memory, and forwards a completion message to each node in the set of nodes after it is determined that each node has accessed the memory. The completion message has data indicating that each node in the set of nodes has accessed the memory of the home node.

Node synchronization for multi-processor computer systems

An apparatus and method of controlling data sharing in a shared memory computer system transfers control of a cache coherency directory (entry) to a node having control of the data. Specifically, the plurality of nodes includes a home node and a second node. The home node has given data in a cache line in its memory, and also has a directory identifying the state of the cache line. The method and apparatus thus detect a request for ownership of the cache line from the second node, and enable the second node to control the directory after receipt of the request.

Apparatus and method of controlling data sharing on a shared memory computer system

An address translation unit generates a physical address for access to a memory from a virtual address using either a translation lookaside buffer or a segmentation buffer. If the virtual address falls within a predetermined range, the address translation unit will use the segmentation buffer to generate the physical address. Upon generation of the physical address, the memory will either receive data from or provide data to a processor in accordance with the instructions being processed by the processor.

System and method for performing address translation in a computer system

In a network of computer nodes, a directory service provides both the physical location of directory information around the network and the directory information itself in a single data structure. This single data structure is distributed throughout the network, and continuously redistributed, so as to create a directory service that is both more flexible, and more robust, than prior art directory services.

Dynamic directory service

Distributed shared memory systems and processes that can connect into each node of a computer network to encapsulate the memory management operations of the connected nodes and to provide thereby an abstraction of a shared virtual memory that can span across each node of the network and that optionally spans across each memory device connected to the computer network. Accordingly, each node on the network having the distributed shared memory system of the invention can access the shared memory.

Shared memory computer networks

A shared client-side Web cache is provided by implementing a file system shared between nodes. Each browser application stores cached data in files stored in a globally addressable data store. Since the file system is a shared one, the client-side Web caches are also shared.

Shared client-side web caching using globally addressable memory

A computer system employs a globally addressable storage environment that allows a plurality of networked computers to access data by addressing even when the data is stored on a persistent storage device such as a computer hard disk and other traditionally non-addressable data storage devices. The computers can be located on a single computer network or on a plurality of interconnected computer networks such as two local area networks (LANs) coupled by a wide area network (WAN). The globally addressable storage environment allows data to be accessed and shared by and among the various computers on the plurality of networks.

Remote access and geographically distributed computers in a globally

In a network of computer nodes, a structured storage system interfaces to a globally addressable memory system that provides persistent storage of data. The globally addressable memory system may be a distributed shared memory (DSM) system. A control program resident on each network node can direct the memory system to map file and directory data into the shared memory space. The memory system can include functionality to share data, coherently replicate data, and create log-based transaction data to allow for recovery. In one embodiment, the memory system provides memory device services to the data control program. These services can include read, write, allocate, flush, or any other similar or additional service suitable for providing low level control of a memory storage device. The data control program employs these memory system services to allocate and access portions of the shared memory space for creating and manipulating a structured store of data such as a file system, a database system, or a Web page system for storing, retrieving, and delivering objects such as files, database records or information, and Web pages.

Structured data storage using globally addressable memory

A network of computer node interface to globally addressable memory system that provides persistent storage of data exchange periodic connectivity information. The exchanged connectivity information provides information regarding node failure to other nodes in the system, and the surviving nodes use the information to determine which node, if any, has ceased functioning. Various processes are used to recover the portion of the global address space for which the failed node was responsible, including RAM directory, disk directory, or file system information. Additionally, nodes may be subdivided into groups and connectivity information is exchanged between nodes belonging to a group. Each group then exchanges group-wise connectivity information and failures may be recovered.

Growing community of inventors

Salt Lake City, UT, United States of America

John B Carter