Thread context restoration in a multithreading computer system

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 9389862
SERIAL NO

14226911

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Abstract

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Embodiments relate to thread context restoration. One aspect is a multithreading computer system including a configuration with a core configurable between a single thread (ST) mode and a multithreading (MT) mode. The ST mode addresses a primary thread and the MT mode addresses the primary thread and one or more secondary threads on shared resources of the core. A multithreading facility is configured to control utilization of the configuration to perform a method including disabling one or more secondary threads based on switching from MT mode to ST mode. A thread context of secondary threads is made unavailable to programs. Based on a last-set program-specified maximum thread-id indicating MT, the thread context is obtained by a) executing a set MT instruction to resume the MT mode, and b) based on being in the resumed MT mode, accessing the thread context.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bradbury, Jonathan D Poughkeepsie, US 270 2075
Busaba, Fadi Y Poughkeepsie, US 218 1676
Farrell, Mark S Pleasant Valley, US 139 2390
Gainey,, Jr Charles W Poughkeepsie, US 140 2328
Greiner, Dan F San Jose, US 272 4306
Heller, Lisa Cranton Rhinebeck, US 70 891
Kubala, Jeffrey P Poughquag, US 82 2075
Osisek, Damian L Vestal, US 153 5128
Schmidt, Donald W Stone Ridge, US 173 2707
Slegel, Timothy J Staatsburg, US 400 5854

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