Hypervisor Dynamic Virtual Processor Withdrawal
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Solution Overview
Problem
Virtualized computer systems face inefficiencies in resource allocation and performance optimization, as existing technologies lack dynamic mechanisms to adjust virtual processor allocation based on system load conditions, leading to suboptimal utilization of resources across virtual machines.
Innovation Solution
A hypervisor-based system that monitors system load and dynamically withdraws virtual processors from virtual machines when load thresholds are met, allowing for reallocation of resources to improve performance across other virtual machines without requiring shutdowns or restarts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If virtual processors are statically allocated to virtual machines, then system stability and simplicity are improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic virtual processor allocation by allowing the hypervisor to hot-plug virtual processors into and out of virtual machines during runtime. This dynamic adjustment mechanism enables the system to adapt resource allocation to changing workload demands, improving resource utilization efficiency while maintaining system stability through controlled hot-plugging operations that do not require VM shutdowns.
Solution Approach 2:
The patent changes the allocation parameters of virtual processors dynamically based on system load conditions. The hypervisor monitors system state and adjusts the number of active virtual processors assigned to each virtual machine, transforming the static allocation model into a flexible parameter-adjustable model that optimizes resource utilization without compromising system reliability.
2Productivity
If virtual processor allocation is dynamically adjusted, then resource utilization efficiency is improved, but system complexity and risk of instability increase
Solution Approach 1:
The hypervisor serves as an intermediary layer between the physical hardware and virtual machines, managing the complexity of dynamic virtual processor allocation. It handles the hot-plugging operations, updates device trees, and coordinates resource allocation, thereby isolating the complexity from both the VMs and the underlying hardware while enabling efficient resource utilization.
Solution Approach 2:
The system implements feedback mechanisms where the hypervisor continuously monitors system load and performance metrics, then adjusts virtual processor allocation accordingly. This closed-loop control approach enables dynamic optimization of resource utilization while maintaining system stability through responsive adjustments based on actual system state.
3Productivity
If virtual processors are removed from virtual machines, then resource allocation efficiency is improved, but virtual machine functionality may deteriorate
Solution Approach 1:
The patent enables dynamic adjustment of virtual processor allocation where the hypervisor can hot-unplug virtual processors from virtual machines when resources need reallocation. This dynamic mechanism allows temporary reduction of VM functionality during resource transitions while ensuring the VM can be restored or reassigned, ultimately improving overall resource allocation efficiency across the virtualized environment.
Data Source
AI summary
A system and method for withdrawing virtual processors from virtual machines (VMs) are disclosed. A hypervisor executed by a physical processor detects a measure of system load pertaining to a virtual processor of a virtual machine and withdraws the virtual processor from the virtual machine in view of the measure of system load.