Disk performance

Hi Everybody

I have a debian 12 with 6.1.0-25 kernel. The hardware is HP dl380 g9 .
On the native linux kernel I have run this test three times.
The results was these.
917.16 MiB/sec
937.52 MiB/sec
934.25 MiB/sec

After that I have installed proxmox enviroment with 6.8.12-1-pve kernel, and run again the test.
The result was these.
621.06 MiB/sec
596.09 MiB/sec
594.96 MiB/sec

Why did the io speed drop so much , after...

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