Via Technologies, Inc.

Wei-Long Chen

Jiin Lai

Wayne Tseng

A DSM system includes a local node, a first remote node, and a second remote nodes. The data access method for a remote node to access a local node in the DSM system includes the steps of directly receiving data of a local memory line from a local memory of the local node, and transmitting the data to the first remote node when the local memory line is in HOME-N or SHARED status; directly receiving data of the local memory line from the second remote node, and transmitting the data to the first remote node when the local memory line is in a GONE status; and asserting a transaction to a system bus to read data of the local memory line, receiving the data via the system bus, and transmitting the data to the first remote node when the local memory line is in HOME-M status.

Remote node accessing local memory by using distributed shared memory

A distributed shared memory (DSM) system includes a first and a second nodes. The first node includes a first system bus; at least one first processor electrically connected to the first system bus; a first memory control chip electrically connected to the at least one first processor via the first system bus; a first local memory electrically connected to the first memory control chip and including a plurality of first local memory lines for separately storing data; and a first DSM controller electrically connected to the first system bus and the first memory control chip, and directly coupled to a second DSM controller of the second node via a bus line.

Distributed shared memory system and data-maintenance method of same

A distributed shared memory (DSM) system includes at least a first and a second nodes. The first node includes an external cache for storing a data from a local memory of the second node and at least two processors optionally accessing the data from the external cache. Whether the data has been modified into a modified data by a first certain one of the at least two processors is first determined. If positive, whether a second certain one of the at least two processors is allowed to share the modified data is further determined. If the second certain processor is allowed to share the modified data, it may directly request the modified data from the first certain processor via a bus inside the first node.

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Rochester, MN, United States of America

Wei-Long Chen