DISPATCHING MULTIPLE THREADS IN A COMPUTER

摘要

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.