login vsi company logo login vsi company logo 250x40

 

Get the best possible VDI performance, density and availability with Login VSI
Our Solutions

  • Home
  • Blog
  • Login VSI
  • Graphics testing in virtualized desktop environments: How-to size your launchers

Graphics testing in virtualized desktop environments: How-to size your launchers

Graphics testing in virtualized desktop environments: How-to size your launchers

One increasingly common way to support high-end applications is to implement GPUs on the host workstation in virtual desktop environments. Doing so accelerates hardware and makes it possible for geographically-distributed design teams to work collaboratively in real time via virtualized desktops. To meet this trend, Login VSI created the Login VSI Graphics Framework so that our customers can perform easy and repetitive testing specifically designed for graphics-intense applications. Since these GPU-enabled environments behave differently than “regular” virtual desktop environments, sizing of the Login VSI launcher machines is a bit different than regular Login VSI tests. In this blog, I will help you correctly size your Login VSI launcher machine for graphics testing.

Maximum sessions

For example, the Office Worker workload in Login VSI 4.1 has a limited amount of multimedia and heavy graphics applications. With the normal Login VSI workloads, like knowledgeworker and officeworker workloads, we recommend a maximum of 50 users per launcher when using RDP as connection protocol. For any other protocol, the recommendation is a maximum of 25 sessions per launcher. This is based on hardware of 2 CPUs and 4GB of RAM, which can be either virtual or physical hardware.

The Login VSI Graphics Framework is intended to be used with graphics-heavy applications. Citrix and NVIDIA introduced the vGPU on XenServer, which gives XenDesktop machines access to a virtualized GPU. Together with HDX 3D Pro, the vGPU technology proves to be very powerful for these types of rich graphics applications.

HDX 3D Pro compresses the graphical data it sends to the end client, which allows high-quality graphics with reduced bandwidth (bandwidth savings can be up to 50%). The compression takes CPU power on the guest operating system, which should be taken in account when sizing your GPU-enabled virtual desktop environment. The impact of HDX 3D Pro can be easily measured by using the Login VSI Graphics Framework.

The compressed graphical intensive content needs to be decompressed at the endpoint device. This decompression takes CPU power on the endpoint. When monitoring CPU usage of the Citrix Receiver on the endpoint, I measured an average CPU usage of 9%, with peak CPU usage going to 14%. This measurement was done on a laptop with a quad-core i7 processor.

graphics cpu usage citrix receiver

Launcher hardware

The resolution of your endpoint device will make a big difference on the load that is generated on the virtual desktop environment. Higher resolution means more screen updates, which leads to higher CPU/GPU utilization.

Virtual hardware will not be able to use the resolution that a real-world end-user would use. You can think of multi-monitor configurations, which are not uncommon on CAD/CAM workstations. To be sure of the sizing of GPU-enabled virtual desktop environments, tests should be done which are as close to real-world as possible. This means that if your environment is configured with multi-monitor endpoints, you should test with multi-monitor launcher machines.

Only physical hardware supports multi-monitor configuration, and physical hardware is capable of higher resolutions. While it is absolutely possible to use virtual hardware as launchers in GPU-enabled virtual desktop environments, it is recommended to use physical hardware.

Conclusion

Taking into account the resolution and CPU utilization on the launcher machines, the maximum number of sessions launched from one launcher should be very limited. As stated before, the recommendation is to use physical hardware as launchers. The type of CPU installed will have a big impact on the maximum number of sessions. The recommendation is not to launch more than 5 sessions per launcher.

If possible, use a 1-to-1 mapping for launched sessions per launcher. This means that if you want to do a test with 30 users, using the Login VSI Graphics Framework you should use at least 6 launchers, but we recommend you use 30 physical launchers.

 


 

Start using Login VSI today

Our industry-standard software is built to help you avoid problems, lower costs and improve performance. Request a Quote or get your free Trial below, and benefit from our award-winning services.

Free Price Request  Your Free Trial

 


About the company Login VSI

The company Login VSI provides end-user performance insights for virtualized desktop and server-based computing environments. Enterprise IT departments use flagship product Login VSI (for load testing) and Login PI (for continuity testing) in all phases of their virtual desktop deployment—from planning to deployment to change management—to build and safeguard a good performance, a high availability, and (as a result) a good and consistent end-user experience. For more information about Login VSI or for a free test license contact us.

Tags: How-to, Login VSI, Graphics Framework, Best Practices, Support

Popular Blogs

Login VSI Blog - Ongoing Effects CPU Flaws

The Ongoing Effects of Intel CPU Flaws

The Ongoing Effects of Intel CPU Flaws Over the last year, we’ve seen many Intel CPU hardware flaws come to light and when news first broke about Meltdown & Spectre there was a lot of panic: "should we patch?", "What’s the performance impact?", "Can we still rely on this hardware?" Continue Reading
Login VSI Blog - Updating to Windows 10 1903? Make Sure to Test!

Updating to Windows 10 1903? Make Sure to Test!

Updating to Windows 10 1903? Make Sure to Test! It’s that time of the year again. Microsoft have released their spring update and the first IT-Pro’s are getting ready to move their VDI environment over. Continue Reading
Login AT Express offers Application Compatibility Testing for up to 50 applications for FREE

[Press Release] Login VSI introduces free license for award winning solution, Login AT

Login AT Express offers Application Compatibility Testing for up to 50 applications for FREE Atlanta, USA, May 22, 2019: Login VSI, the industry standard for VDI and SBC performance testing, announced today the availability of a new, free version of Login AT for Bulk Application Compatibility Testing. Continue Reading
Login VSI Blog - LVTE 2109 - Technology Advocates & Experts

Login VSI Technology Advocates and Experts 2019

About a year ago Login VSI, the industry standard in VDI performance testing, announced a new program Recognizing those individuals that have built and displayed extensive knowledge of the Login VSI software solutions, and visibly contribute to the End-User Computing (EUC) Community. Continue Reading
Introducing Login PI 3.4

Introducing Version 3.4 of Login PI

What’s New & Different - Introducing Version 3.4 of Login PI We've updated Login PI, the benchmark in unplanned-change and gradual-deterioration detection for VDI. New features include improving the way information is collected & distributed, the way customized workloads are created & the way actual tests are executed. Continue Reading
Login VSI Blog - What's New in Login PI 3.5

What's New in Login PI 3.5?

What's New in Login PI 3.5? Netscaler, SLA Reporting, Event Logging features and so much more! At the end of June, we released a new version of Login PI 3 bursting with new features and enhancements. There are so many that I could write pages of blog about it, but let’s just keep it simple and focus on some of the big items. Continue Reading
Cookie Settings