Virtual Machine CPU Load Calculation via Direct NIC Detection
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Solution Overview
Problem
In information processing systems with virtual machines, estimating CPU load accurately is challenging due to increased I/O data transmission and the ability of virtual machines to perform direct data transmission via physical NICs without hypervisors, complicating network configuration management across multiple hypervisors.
Innovation Solution
A load calculation program that acquires processor usage and data transmission information, detects virtual network interfaces not routing through the hypervisor, and calculates CPU loads based on network configurations to estimate CPU usage for each virtual machine with high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If virtual machines perform direct data transmission via physical NIC without hypervisor involvement, then I/O data transmission capability is improved, but CPU load estimation accuracy deteriorates
Solution Approach 1:
The patent segments virtual network interfaces into two categories: those that route through the hypervisor and those that perform direct transmission via physical NIC. By detecting and distinguishing between these two types of interfaces, the system can separately calculate CPU loads for each category, thereby maintaining accurate CPU load estimation even when some virtual machines use direct transmission paths that bypass the hypervisor.
2Adaptability or versatility
If multiple different hypervisors are mounted on physical machines, then system versatility is improved, but network configuration management complexity increases
Solution Approach 1:
The patent implements a universal detection mechanism that can identify virtual network interface characteristics across multiple different hypervisor types. The detection method focuses on observable behavior (whether data transmission routes through the hypervisor) rather than hypervisor-specific configurations, enabling the system to adapt to various hypervisor implementations without requiring separate management approaches for each type.
3Adaptability or versatility
If manual management of virtual NIC network configurations is performed, then configuration flexibility is improved, but management time and effort increase
Solution Approach 1:
The patent implements an automated detection mechanism that self-identifies virtual network interfaces performing direct transmission without requiring manual configuration or intervention. The system automatically detects the transmission path characteristics, categorizes interfaces accordingly, and calculates CPU loads based on detected configurations, thereby eliminating the need for manual management while preserving configuration flexibility.
Data Source
AI summary
A load calculation program that causes a computer a process includes acquiring processor usage information including usage of a processor of an managed computer, which is a management object, and usage of the processor for each of a plurality of virtual machines generated by a hypervisor executed on the managed computer; acquiring data transmission information including a data transmission amount for each virtual network interface used by the plurality of virtual machines; detecting a first virtual network interface that performs data transmission without routing through the hypervisor among the plurality of virtual network interfaces, based on the processor usage information and the data transmission information; and calculating load information including processor usage for data transmission of each of the plurality of virtual machines, based on whether or not each of the virtual machines uses the first virtual network interface.