EPYC 7003/7002 shows only 255 CPUs online
Issue
- System has 256 logical processors (0 - 255)
- However,
lscpu
shows only 255 CPUs are online, 1 CPU is offline
# lscpu
...
CPU(s): 256
On-line CPU(s) list: 0-254
Off-line CPU(s) list: 255
...
Environment
- Red Hat Enterprise Linux 7
- EPYC 7003/7002 Series Processors
- Input-Output Memory Management Unit (
IOMMU
) disabled
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