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US 9,286,131 B2Granted
Processor unplug in virtualized computer system
AssigneeRed Hat Israel, Ltd.
InventorsMichael Tsirkin, Dor Laor
Life of this patent
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Abstract
A system and method for withdrawing virtual processors from virtual machines (VMs) are disclosed. In accordance with one embodiment, a hypervisor executed by a computer system detects when a measure of system load for a virtual machine falls below a threshold. In response, the hypervisor withdraws a virtual processor from the virtual machine.
Claims20
A method comprising:
- detecting, by a hypervisor executed by a physical processor, when a measure of system load for a virtual machine falls below a threshold, wherein the measure of system load being in view of a context switch of a thread executed by a virtual processor of the virtual machine;
- and
- withdrawing by the hypervisor, in response to the detection, the virtual processor from the virtual machine.
An apparatus comprising:
- a memory to store a virtual machine;
- and
- a physical processor operatively coupled to the memory, the physical processor to:
- execute the virtual machine;
- execute a hypervisor;
- detect, via the hypervisor, when a measure of system load for the virtual machine falls below a threshold, wherein the measure of system load being in view of a context switch of a thread executed by a virtual processor of the virtual machine;
- and
- in response to the detection, withdraw, via the hypervisor, the virtual processor from the virtual machine.
5 more elements
A non-transitory computer readable storage medium, comprising instructions stored therein, which when executed, cause a physical processor to:
- detect, by a hypervisor executed by the physical processor, when a measure of system load for a virtual machine falls below a threshold, the measure of system load being in view of a context switch of a thread executed by a virtual processor of the virtual machine;
- and
- withdraw by the hypervisor, in response to the detection, the virtual processor from the virtual machine.
Dependencies are inferred from the claim text.