Configure the CPUs assigned to Proxmox


New Member
Feb 4, 2021
I have promox, and I have the following processor: Intel Xeon D-1521, But Promox only detects that I only have 2 threads when I have 8. So I would like to know how to modify this, I have already looked a little on the forum, but found nothing :).
I attach you a screenshot of Iscpu
Please help me or direct me to adequate documentation.
Thank you in advance for your reply.
Sorry for English, I'm using Google Translate


  • cpu.png
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New Member
Feb 4, 2021
However, there should be 8 threads as seen on the processor specifications
cpu 2.png
Mar 16, 2019
California, USA
All Intel CPU's that support hardware threads have 2 threads per core. So there are 8 total threads on a D-1521, which is exactly what your screenshot shows. The cpu specifications you outlined in red means total cores = 4, total threads = 8, which is 2 per core, which agrees with your lscpu output.

I have a D-1541. It has 16 threads and this is my lscpu output:

root@vm-host:~# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
Address sizes:       46 bits physical, 48 bits virtual
CPU(s):              16                           <<<<< Total virtual CPU's = total threads = 16    
On-line CPU(s) list: 0-15
Thread(s) per core:  2                    <<<<< Two threads per core 
Core(s) per socket:  8                    <<<<< Eight cores
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               86
Model name:          Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz
Stepping:            3
CPU MHz:             1641.773
CPU max MHz:         2700.0000
CPU min MHz:         800.0000
BogoMIPS:            4200.03
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            12288K
NUMA node0 CPU(s):   0-15
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