ESXi vs Proxmox (Speed)

[wav3front]

Hi,

I recently migrated from ESXi (free) to Proxmox.

Before the migration, I run geekbench and crystalmark benchmarks.

On the same server (AMD 7313) and the exact same CPU configuration, the VM on ESXi reported a single-core score of 1745 and multi-core score of 9239.
The same exact vm on Proxmox reported single-core 1506 and multi-core 7766. Quite a large difference.

CPU type is "host". I have not made any other configuration changes.

This is expected? is proxmox generally slower than esxi?

Thank you
Alex

 

[leesteken]

Proxmox, because it is based on Linux, has mitigations against Spectre vulnerabilities. I think ESXi did not. Lots of conflicting opinions on the internet about whether the performance decrease is worth the security fixes (lots of benchmarks on the internet also). Maybe try without the mitigations and test for yourself? Or just accept that modern hardware has issues that need to be fixed in software.

 

[wav3front]

Did not know about that.

Maybe try without the mitigations and test for yourself?

You mean it's possible to disable the mitigations?

 

[wav3front]

For what's worth, I created a VM from scratch (not moved from ESXi) and the geekbench scores were higher, as high as it was with ESXI.

 

[aschrijver]

We have deployed newly installed VDI's with Nvidia vGPU and the overall performance is better.
Old: ESXi 7.0 with vSAN as underlying storage (Windows 10 ENT)
New: Promox 8.2 with CEPH as underlying storage (Windows 11 ENT)

Also migrated machines perform better in regards of latency and write speeds.
Migration of Windows machines is sometimes a little bit of struggle. (controller type / UEFI / TPM etc.)

 

[wav3front]

For what's worth, I created a VM from scratch (not moved from ESXi) and the geekbench scores were higher, as high as it was with ESXI.

Anyone know why is that the case?

 

[_gabriel]

Anyone know why is that the case?

Windows version ?

 

[BobhWasatch]

Anyone know why is that the case?

I think it is really hard to say without seeing the configuration of both VM's.

 

[wav3front]

Windows version ?

Windows Server 2022

 

[wav3front]

This is the VM that was migrated from ESXI that performs slower.

 

[wav3front]

And this is the VM I created from scratch on Proxmox, that performs better.

 

[_gabriel]

set controller VirtIO SCSI to Single

 

[wav3front]

sure, but this cannot be related to the cpu?

 

[_gabriel]

storage will be on dedicated qemu threads instead same qemu main thread.
+ switch vdisk virtio to scsi with io thread allowed by SCSI Single controller.

edit extra tip : switch to virtio scsi driver version v0.1.208 from 2021 because there is an issue after, hangs during high IO like 4k multi threads like Benchmarks.

 

[Falk R.]

And you can try to change machinetype from i440 to q35.

 

[wav3front]

And you can try to change machinetype from i440 to q35.

tried that, no change.

 

[wav3front]

storage will be on dedicated qemu threads instead same qemu main thread.
+ switch vdisk virtio to scsi with io thread allowed by SCSI Single controller.
switch to virtio scsi driver version v0.1.208 from 2021 because there is an issue after, hangs during high IO like 4k multi threads like Benchmarks.

Found everything except this.

How do I use scsi driver 0.1.208?

 

[_gabriel]

How do I use scsi driver 0.1.208?

Download this version as iso, then update driver from device manager with selecting inf browsing the iso.
reboot required.

 

[VictorSTS]

switch to virtio scsi driver version v0.1.208 from 2021 because there is an issue after, hangs during high IO like 4k multi threads like Benchmarks.

Do you have any source on this? Is this related to VirtIO block or VirtIO SCSI / single driver?
Haven't experienced any issues with newer versions than that, thanks!

@wav3front , all VirtIO versions are available here:

https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/

 

[_gabriel]

Do you have any source on this? Is this related to VirtIO block or VirtIO SCSI / single driver?
Haven't experienced any issues with newer versions than that, thanks!

@wav3front , all VirtIO versions are available here:

https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/

Mainly VirtIO SCSI
https://forum.proxmox.com/threads/r...device-system-unresponsive.139160/post-691337

It's unrelated to OP , just say as extra tip because advice VirtIO SCSI Single which allow qemu process per disk, afaik.