Re: VMs Win 11 Pro Frozen

norbert-wnuk — Sun, 27 Aug 2023 20:31:53 GMT

The very similar issue occurs for me on Ubuntu 22.04 (from time to time). The VM continue to work in the background, since you can SSH into it, however all attempts to restart vmtools, gdm, gnome session, etc. not bringing back the ability to interact via mouse and keyboard (the input is still being grabbed). Kernel and VM logs do not contain anything interesting (except usual toolbox-dnd timeout message).

Stability and performance

norbert-wnuk — Wed, 23 Aug 2023 19:49:18 GMT

I would like to propose a few of long-time existing glitches and performance limitations (that affects hundreds of my coworkers and are quite frequently mentioned on this forum as well).

- Manual tweaking of power throttling (in Windows) and P cores affinity (VMX) to avoid freezes, that reduces performance of the VM since 1/3 of the cores cannot be effectively activated (E cores on Intell 12/13th generation processors).

- Mysterious random GUI/Xorg freezes that forces to suspend and / or restart VMs with certain 5.15/5.19 Linux kernels for supported Ubuntu 22.04 LTS releases (at least this seems to be gone in 6.2 kernel).

- Limited performance of NVME disks, that after tuning can reach only <75% (Ubuntu 22.04 6.2 HWE) of raw host performance (5.x kernels are worse). Additionally, NVME controller is affected by strange I/O timeouts on certain workloads / configurations (23H1 beta seems to be reducing number of timeouts but not eliminating). Finally, in my case SCSI is not a fallback since performance is significantly worse, reaching ~30% of raw host performance (especially terrible latency).

- Limited performance of SVGA3D driver, especially now when GPU Partitioning becoming a thing in Hyper-V for standard GPUs.

norbert-wnuk Tracker

Re: VMs Win 11 Pro Frozen

Stability and performance