Mark C Farrell

US Patent:

8276151, Sep 25, 2012

Filed:

Sep 6, 2006

Appl. No.:

11/470487

Inventors:

Greg A. Dyck - Morgan Hill CA, US
Mark S. Farrell - Pleasant Valley NY, US
Charles W. Gainey - Poughkeepsie NY, US
Jeffrey P. Kubala - Poughquag NY, US
Robert R. Rogers - Beacon NY, US
Mark A. Wisniewski - Wappingers Falls NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46
G06F 13/00

US Classification:

718104, 718105, 711150, 711151, 711152

Abstract:

A method is provided for a first logical processor to determine a running status of a target logical processor of an information processing system. In such method, an instruction is issued by the first logical processor running on the information processing system for determining whether the target logical processor is running. In response to issuing the instruction, a state descriptor belonging to the target logical processor is queried to determine whether the target logical processor is currently running. A result is then returned to the first logical processor, the result indicating whether or not the target logical processor is currently running.

US Patent:

20130014123, Jan 10, 2013

Filed:

Sep 14, 2012

Appl. No.:

13/619400

Inventors:

Greg A. Dyck - Morgan Hill CA, US
Mark S. Farrell - Pleasant Valley NY, US
Charles W. Gainey - Poughkeepsie NY, US
Jeffrey P. Kubala - Poughquag NY, US
Robert R. Rogers - Beacon NY, US
Mark A. Wisniewski - Wappingers Falls NY, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 9/46

US Classification:

718104

Abstract:

An embodiment provides for operating an information processing system. An aspect of the invention includes allocating an execution interval to a first logical processor of a plurality of logical processors of the information processing system. The execution interval is allocated for use by the first logical processor in executing instructions on a physical processor of the information processing system. The first logical processor determines that a resource required for execution by the first logical processor is locked by another one of the other logical processors. An instruction is issued by the first logical processor to determine whether a lock-holding logical processor is currently running. The lock-holding logical processor waits to release the lock if it is currently running. A command is issued by the first logical processor to a super-privileged process for relinquishing the allocated execution interval by the first logical processor if the locking holding processor is not running.