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:
Jun. 22, 1993
Filed:
Aug. 29, 1991
Norman C Chou, Poughkeepsie, NY (US);
Peter H Gum, Poughkeepsie, NY (US);
Roger E Hough, Highland, NY (US);
Moon J Kim, Fishkill, NY (US);
James C Mazurowski, Poughkeepsie, NY (US);
Donald W McCauley, Pleasant Valley, NY (US);
Casper A Scalzi, Poughkeepsie, NY (US);
John F Scanlon, Hyde Park, NY (US);
Leslie W Wyman, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A CPU interface recognizing a large very number of I/O interruption queues in a logically partitioned data processing system. Different partitions may contain different guest operating systems. The CPU interface controls how plural CPUs respond to I/O interruptions put on numerous hardware-controlled queues. A host hypervisor program dispatches the guest operating systems. The guests use the I/O interruptions in controlling the dispatching of their programs on the CPUs in a system. The invention allows the number of guest partitions in the system to exceed the number of I/O interruption subclasses (ISCs) architected in the system, and enables the dispatching controls of each guest operating system to be sensitive to different priorities for plural programs operating under a respective guest. The invention provides CPU controls that support alerting the host to enabled I/O interruptions, and provides CPU controlled pass-through for enabling direct guest handling of the guests I/O interruptions.