Managing Virtual Machines with Virt-Manager and GVT-G: A Comprehensive Guide

Honyee Chua

Hatched by Honyee Chua

Dec 04, 2023

3 min read


Managing Virtual Machines with Virt-Manager and GVT-G: A Comprehensive Guide


Virtualization technology has revolutionized the way we use computers and servers. With the ability to create and manage virtual machines, organizations can optimize their resources, increase flexibility, and reduce costs. In this article, we will explore two powerful tools - virt-manager and GVT-G - that enable efficient virtual machine management and graphics sharing. Let's dive in!

  • 1. Virt-Manager: Simplifying Virtual Machine Management

Virt-manager is a user-friendly desktop application that allows you to manage virtual machines through the libvirt library. While its primary focus is on KVM virtual machines, it also supports Xen and LXC containers. The application provides a comprehensive overview of running domains, displaying real-time performance and resource utilization statistics. Additionally, virt-manager offers wizards for creating new domains and configuring virtual hardware.

One of the standout features of virt-manager is its embedded VNC and SPICE client viewer. This graphical console allows you to interact with the guest domain, providing a seamless and immersive experience. With virt-manager, managing virtual machines becomes a breeze, enabling you to streamline your virtualization workflow.

  • 2. GVT-G: Sharing Graphics Resources Among Virtual Machines

GVT-G, short for Graphics Virtualization Technology - G, is a groundbreaking technology that allows multiple virtual machines to share a single graphics processing unit (GPU). Similar to SR-IOV for network cards, GVT-G leverages the capabilities of modern BIOS systems to enable direct graphics passthrough to virtual machines.

With GVT-G, you can harness the full power of your GPU, even when running multiple virtual machines simultaneously. This technology opens up new possibilities for graphics-intensive applications and scenarios, such as gaming, multimedia editing, and virtual desktop infrastructure (VDI) deployments. By efficiently sharing graphics resources, GVT-G optimizes GPU utilization and enhances the overall virtual machine experience.

  • 3. Leveraging GVT-G in PVE 7.0 and Other Environments

PVE 7.0, an abbreviation for Proxmox Virtual Environment 7.0, is a popular open-source virtualization platform. It offers seamless integration with GVT-G, allowing users to leverage this technology effortlessly. By following a few simple steps, you can enable GVT-G and share your GPU among multiple virtual machines in PVE 7.0.

Additionally, GVT-G is not limited to PVE 7.0. It can be used in various environments, including x86 systems, OpenWrt (x86), and Router OS. This flexibility makes GVT-G a versatile solution for graphics sharing, catering to different use cases and requirements.

Actionable Advice:

  • 1. Prioritize Resource Allocation: When managing virtual machines, it is crucial to allocate resources effectively. Assess the requirements of each virtual machine and adjust resource allocation accordingly. By optimizing resource utilization, you can enhance performance and avoid bottlenecks.
  • 2. Regularly Monitor Performance: Monitoring the performance of virtual machines is essential for maintaining optimal operation. Utilize the performance and resource utilization statistics provided by virt-manager to identify any performance issues or areas of improvement. Regular monitoring allows you to proactively address any potential issues and ensure smooth virtual machine operation.
  • 3. Explore GPU Passthrough for Graphics-Intensive Workloads: If you frequently work with graphics-intensive applications or require enhanced graphical capabilities in your virtual machines, consider implementing GVT-G or similar technologies. By sharing the GPU among multiple virtual machines, you can achieve excellent performance and deliver a seamless user experience.


In this article, we explored the powerful combination of virt-manager and GVT-G for efficient virtual machine management and graphics sharing. Virt-manager simplifies the management of virtual machines, providing a user-friendly interface and real-time performance monitoring. GVT-G, on the other hand, enables multiple virtual machines to share a single GPU, optimizing graphics utilization.

To make the most of these tools, prioritize resource allocation, regularly monitor performance, and consider GPU passthrough for graphics-intensive workloads. By following these actionable tips, you can maximize the benefits of virtualization and streamline your virtual machine management processes. Embrace the power of virt-manager and GVT-G, and unlock a world of possibilities in virtualization.

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