Dispatching multiple threads in a computer
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United States of America Patent
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Nov 24, 2015
Grant Date -
Oct 1, 2015
app pub date -
Mar 27, 2014
filing date -
Mar 27, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
According to one aspect, a computer system includes a configuration with a machine enabled to operate in a single thread (ST) mode and a multithreading (MT) mode. In addition, the machine includes physical threads. The machine is configured to perform a method that includes issuing a start-virtual-execution (start-VE) instruction to dispatch a guest entity having multiple logical threads on the core. The guest entity includes all or a part of a guest virtual machine (VM), and issuing is performed by a host running on one of the physical threads on the core in the ST mode. The executing of the start-VE instruction by the machine includes mapping each of the logical threads to a corresponding one of the physical threads, initializing each of the mapped physical threads with a state of the corresponding logical thread, and starting execution of the guest entity on the core in MT mode.
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