Thread sparing between cores in a multi-threaded processor

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United States of America Patent

PATENT NO 9164854
APP PUB NO 20140089732A1
SERIAL NO

13783797

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Abstract

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Embodiments relate to thread sparing between cores in a processor. An aspect includes determining that a number of recovery attempts made by a first thread on the first core has exceeded a recovery attempt threshold, and sending a request to transfer the first thread. Another aspect includes, selecting a second core from a plurality of cores to receive the first thread from the first core, wherein the second core is selected based on the second core having an idle thread. Another aspect includes transferring a last good architected state of the first thread from the first core to the second core. Another aspect includes loading the last good architected state of the first thread by the idle thread on the second core. Yet another aspect includes resuming execution of the first thread on the second core from the last good architected state of the first thread by the idle thread.

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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
Busaba, Fadi Y Poughkeepsie, US 218 1676
Carlough, Steven R Poughkeepsie, US 160 823
Krygowski, Christopher A Lagrangeville, US 64 569
Prasky, Brian R Wappingers Falls, US 154 1163
Shum, Chung-Lung K Wappingers Falls, US 315 2136

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