Question

I am developing a C# WPF application that integrates into a larger software platform provided by a partner company. My development environment includes a Hyper-V virtual machine (VM) running Windows 10, and I use the Barracuda VPN client to connect to the partner company’s network. The software platform also communicates continuously with a server (though no large data is exchanged).

The problem

When I test my WPF application embedded within the partner’s platform, the platform’s GUI becomes nearly unusable in my VM, frequently freezing and showing “Not Responding” popups. However, the platform runs smoothly in other environments (at the partner company and customer sites), where no VM or VPN is used.

What I have tried

1. Resources Allocation in Hyper-V

• Allocated 20 GB RAM and 8 virtual CPU cores to the VM.
• Task Manager shows resource utilization never exceeds 48%.
• Resource Monitor indicates the platform process alternates between “Running” and “Not Responding,” with the following stats:
  • Active threads: 84
  • CPU usage: 15%
  • Network utilization: ~5 KB/s (1.7 KB/s sent, 3.2 KB/s received on average).

2. Testing Barracuda VPN Client

• The partner suspects the VPN may be causing delays.
• The VPN connection appears stable, but I cannot ping the server (likely due to firewall restrictions).

3. GPU in Hyper-V

• I suspected a lack of GPU acceleration in Hyper-V might be contributing to the issue.
• Discovered that RemoteFX 3D graphics is deprecated in Hyper-V, and my VM currently lacks hardware GPU acceleration.

4. Render Mode Adjustment

• I am not allowed to set <RenderMode>SoftwareOnly</RenderMode> in the App.config of the platform’s GUI.

5. Prioritizing Network Traffic

• Investigated Adapter Prioritization in the Barracuda VPN Client but found no improvement after prioritizing the VPN adapter.

Questions

1. Could the lack of GPU acceleration in Hyper-V be the root cause, even though other applications (e.g., Visual Studio) run smoothly?
2. Is the low network throughput (5 KB/s) typical for a Barracuda VPN setup, or does it indicate a misconfiguration?
3. Are there alternative optimizations (e.g., WPF-specific, Hyper-V-specific, or network-related) to resolve this issue?
4. How can I isolate whether the problem lies in the VM, the VPN, or the platform’s GUI implementation?

Any guidance or troubleshooting suggestions are appreciated!