Node Identification for Distributed Shared Memory System
First Claim
1. A method, comprising:
- receiving, at a distributed shared memory circuit of a first node in a distributed shared memory system, a message from a second node in the distributed shared memory system comprising a plurality of nodes each having a unique logical unit identifier, wherein the message indicates a memory operation related to a local memory of the first node and identifies a memory address;
if a first plurality of contiguous bits of the memory address equal a logical node identifier of the first node, changing the first plurality of contiguous bits to a predetermined value;
if the first plurality of contiguous bits of the memory address equal the predetermined value, changing the first plurality of contiguous bits to the logical node identifier of the first node;
forwarding the message to a processor of the first node for processing.
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Accused Products
Abstract
An example embodiment of the present invention provides processes relating to a connection/communication protocol and a memory-addressing scheme for a distributed shared memory system. In the example embodiment, a logical node identifier comprises bits in the physical memory addresses used by the distributed shared memory system. Processes in the embodiment include logical node identifiers in packets which conform to the protocol and which are stored in a connection control block in local memory. By matching the logical node identifiers in a packet against the logical node identifiers in the connection control block, the processes ensure reliable delivery of packet data. Further, in the example embodiment, the. logical node identifiers are used to create a virtual server consisting of multiple nodes in. the distributed shared memory system.
30 Citations
21 Claims
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1. A method, comprising:
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receiving, at a distributed shared memory circuit of a first node in a distributed shared memory system, a message from a second node in the distributed shared memory system comprising a plurality of nodes each having a unique logical unit identifier, wherein the message indicates a memory operation related to a local memory of the first node and identifies a memory address; if a first plurality of contiguous bits of the memory address equal a logical node identifier of the first node, changing the first plurality of contiguous bits to a predetermined value; if the first plurality of contiguous bits of the memory address equal the predetermined value, changing the first plurality of contiguous bits to the logical node identifier of the first node; forwarding the message to a processor of the first node for processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising
receiving, at a distributed shared memory circuit of a first node in a distributed shared memory system, a message from a processor of the first node identifying a memory operation related to a local memory of a second node in the distributed shared memory system comprising a plurality of nodes each having a unique logical unit identifier, wherein the message identifies a memory address; -
if a first plurality of contiguous bits of the memory address equal a logical node identifier of the first node, changing the first plurality of contiguous bits to a predetermined value; if the first plurality of contiguous bits of the memory address equal the predetermined value, changing the first plurality of contiguous bits to the logical node identifier of the first node; forwarding the message to the second node for processing. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A distributed shared memory system, comprising:
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a plurality of interconnected nodes, wherein each node has a logical node identifier comprising a plurality of contiguous bits;
wherein each of the nodes comprises one or more processors and a local memory; and
wherein each of the nodes further comprises a distributed memory logic circuit operative to share the local memory of a respective node in a distributed shared memory system to create a shared memory in connection with other nodes of the plurality of nodes accessible using binary addresses comprising a plurality of bits, wherein a first set of contiguous bits of the binary addresses of the shared memory correspond to a logical node identifier of a node in the plurality of nodes, andwherein the one or more processors of each of the nodes are operative to access the local memory of its own node having the first set of contiguous bits of the binary addresses set to a uniform predetermined value; and wherein the distributed memory logic circuit is further operative to map the uniform predetermined value to the logical node identifier of the local node in memory management traffic transmitted between the nodes that include binary addresses of the shared memory. - View Dependent Claims (18, 19, 20, 21)
if the first plurality of contiguous bits of the memory address equal the predetermined value, change the first plurality of contiguous bits to the logical node identifier of the node.
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Specification