Real time multiprocessor system having a write only data link connected to one of the ports of the memory of each of the processor nodes
First Claim
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1. A real time data processing system comprising:
- a plurality of processing nodes; and
write only reflective data link means for transferring memory writes only between the plurality of processing nodes, including a memory coupling bus connected to each of said plurality of processing nodes,each of said nodes having (1) a local bus, (2) a processor coupled to the bus, (3) a memory having at least two means for transferring information to and from the memory so that a first means of said two means couples the memory to the local bus and a second means of said two means couples the memory to the data link means to transfer a memory write from another node to the memory without intervention of said processor, and (4) sensing means connected to the local bus for sensing a write to the memory and then transmitting said write to the memory coupling bus for broadcast to other nodes,at least one of said nodes further including a VMEbus connected to a third means for transferring information to and from the memory of said at least one node and adapted for inputting to and outputting from said memory of said at least one of the nodes via said third means, said VMEbus primarily serving to receive input and to provide output for said at least one node.
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Abstract
A real time data processing system consisting of a plurality of processing nodes and a write only reflective data link for transferring information containing writes only between the plurality or processing nodes. All the nodes include a bus, a processor coupled to the bus, a memory having at least two ports with one port connected to the bus and the other port connected to the data link and a sensor for sensing a write to the memory. At least one node has a VMEbus as the bus and serves as an I/O connected to one port of the memory. Further a local bus included for inputting and outputting from the memory. The local bus is connected to a third port of the memory.
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10 Claims
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1. A real time data processing system comprising:
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a plurality of processing nodes; and write only reflective data link means for transferring memory writes only between the plurality of processing nodes, including a memory coupling bus connected to each of said plurality of processing nodes, each of said nodes having (1) a local bus, (2) a processor coupled to the bus, (3) a memory having at least two means for transferring information to and from the memory so that a first means of said two means couples the memory to the local bus and a second means of said two means couples the memory to the data link means to transfer a memory write from another node to the memory without intervention of said processor, and (4) sensing means connected to the local bus for sensing a write to the memory and then transmitting said write to the memory coupling bus for broadcast to other nodes, at least one of said nodes further including a VMEbus connected to a third means for transferring information to and from the memory of said at least one node and adapted for inputting to and outputting from said memory of said at least one of the nodes via said third means, said VMEbus primarily serving to receive input and to provide output for said at least one node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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Current AssigneeSun Microsystems Incorporated (Oracle Corporation)
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Original AssigneeEncore Computer Corp. (Transdigm Group Incorporated)
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InventorsGupta, Anil, Nixon, Walter T., Humphreys, Hugh M.
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Primary Examiner(s)Black, Thomas G.
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Assistant Examiner(s)Harrity, Paul
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Application NumberUS08/402,763Time in Patent Office274 DaysField of Search395/800, 395/200, 395/325, 395/250, 395/425, 395/200.07, 395/284, 395/475, 395/476, 340/825.05US Class Current712/29CPC Class CodesG06F 15/17 using an input/output type ...
