Multiprocessor system with multiple concurrent modes of execution
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United States of America Patent
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Nov 22, 2016
Grant Date -
Jul 24, 2014
app pub date -
Dec 30, 2013
filing date -
Jan 15, 2010
priority date (Note) -
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Abstract
A multiprocessor system supports multiple concurrent modes of speculative execution. Speculation identification numbers (IDs) are allocated to speculative threads from a pool of available numbers. The pool is divided into domains, with each domain being assigned to a mode of speculation. Modes of speculation include TM, TLS, and rollback. Allocation of the IDs is carried out with respect to a central state table and using hardware pointers. The IDs are used for writing different versions of speculative results in different ways of a set in a cache memory.
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