Patent Number: 7,103,636

Title: Methods and apparatus for speculative probing of a remote cluster

Abstract: According to the present invention, methods and apparatus are provided for increasing the efficiency of data access in a multiple processor, multiple cluster system. Techniques are provided for speculatively probing a remote cluster from either a request cluster or a home cluster. A speculative probe associated with a particular memory line is transmitted to the remote cluster before the cache access request associated with the memory line is serialized at a home cluster. When a non-speculative probe is received at a remote cluster, the information associated with the response to the speculative probe is used to provide a response to the non-speculative probe.

Inventors: Glasco; David B. (Austin, TX)

Assignee: Newisys, Inc.

International Classification: G06F 13/14 (20060101); G06F 12/16 (20060101)

Expiration Date: 9/05/02018