The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 1990
Filed:
Jul. 21, 1988
J Kent Peacock, San Jose, CA (US);
Counterpoint Computers, Inc., San Jose, CA (US);
Abstract
A multiple processor (CPU) computer system, each CPU having a separate, local, random access memory means to which it has direct access. An interprocessor bus couples the CPUs to memories of all the CPUs, so that each CPU can access both its own local memory means and the local memories of the other CPUs. A run queue data structure holds a separate run queue for each of the CPUs. Whenever a new process is created, one of the CPUs is assigned as its home site and the new process is installed in the local memory for the home site. When a specified process needs to be transferred from its home site to another CPU, typically for performing a task which cannot be performed on the home site, the system executes a cross processor call, which performs the steps of: (a) placing the specified process on the run queue of the other CPU; (b) continuing the execution of the specified process on the other CPU, using the local memory for the specified process's home site as the resident memory for the process and using the interprocessor bus to couple the other CPU to the home site's local memory, until a predefined set of tasks has been completed; and then (c) placing the specified process on the run queue of the specified process's home site, so that execution of the process will resume on the process's home site.