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Knowledge Base

Horizon 7.11 & Earlier: High vGPU utilization on VDI machines over PCoIP (with high scaling) (67031)

Last Updated: 12/28/2023Categories: TroubleshootingTotal Views: 5877Language:
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Symptoms

Use of PCoIP with high scaling and idle vGPU VDI sessions causes the vGPU usage within the VDI to be constantly at 80+%, making the VDI unusable

The issue is not seen when running few vGPU's VDI's on the ESXi hosts but is seen once the user starts adding more vGPU VDI's to the ESXi hosts

Important: We recommend you migrate from Horizon 7 to Horizon 8 as soon as possible. Horizon 8 offers numerous improvements in performance, scale, and experience for both Administrators and end users. Please see Ensuring a successful migration from Horizon 7 to Horizon 8 (89840)  for additional advice.

Cause

The issue is that PCoIP uses SVGA devtap, which uses a poll based model to do capture. HW Encode in Blast does not use devtap and is able to use a blocking capture that avoids polling.

For PCoIP a capture call for an unchanging desktop still burns a lot of GPU causing the issue even when the session is idle.

Impact / Risks

The performance of the VDI machine is impacted and machines responds very slow.

Resolution

Issue is resolved in the Horizon 7.12 release.

Workaround

Reduce pcoip.maximum_frame_rate to 18

This can be done using the GPO
https://docs.vmware.com/en/VMware-Horizon-7/7.4/horizon-remote-desktop-features/GUID-0AD7962F-22DC-4FC1-B31B-D48946BF1D47.html
OR
By adding the below registry on the Parent machine:

Registry Hive

HKEY_LOCAL_MACHINE

Registry Path

Software\Policies\Teradici\PCoIP\pcoip_admin

Value Name

pcoip.maximum_frame_rate

Value Type

REG_DWORD

Value

18

Note : This workaround will not be suitable for customer's using High FPS applications.

Other workaround : Switch to Blast protocol. This issue is fixed in Horizon View 7.0.1 for VMware Blast

Detectable by VMware SkylineTM

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Attachments

Additional Resources

KB
•
End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

KB
•
VMware Horizon View 最新问题 (2087257)

KB
•
VMware driver SVGA do View relata uma versão mais recente do que a versão View Agent instalada (2078739)

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