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VDI Design Guide—Virtual Workstation Interactive Collaboration with NVIDIA Omniverse
Introduction Solution Architecture Validation Sizing the Solution Backup and Restore Summary References Appendix A: Definition of Performance Metrics
Appendix A: Definition of Performance Metrics

Appendix A: Definition of Performance Metrics

Home > Workload Solutions > Virtual Desktop Infrastructure > Design and Implementation Guides > VDI Design Guide—Virtual Workstation Interactive Collaboration with NVIDIA Omniverse > Appendix A: Definition of Performance Metrics

Appendix A: Definition of Performance Metrics

  • The following table explains the key performance metrics and components that we used in our testing:

    Table 11. Definition of performance metrics and components
    Metric Definition
    Graphics latency This metric defines the level of response of a remote desktop or application. It measures the duration of any lag that an end-user experiences when interacting with a remote desktop or application.
    FPS This metric is a common measure of user experience and defines how smooth the experience is. It measures the rate at which frames per second (FPS) are delivered on the screen of the endpoint device.
    SSIM This index metric defines image quality. It uses the Structural Similarity Index (SSIM) to compare an image that is rendered on the target desktop or workstation VM with the image that is displayed on the endpoint device. The average SSIM index of all pairs of images is computed for a single point in time for the VDI session. The index score is calculated once during the workload, so a single value score is given for each workload.
    GPU Physical graphical processing unit commonly used to accelerate graphic and compute workloads.
    vGPU Virtualized instances of the GPU which are assigned to virtual machines or workstations.
    vGPU profile The amount of GPU memory that each vGPU is assigned. Select profile sizes to cater for your different use cases and varying graphics/compute requirements.