Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 46 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 96
On-line CPU(s) list: 0-47
Off-line CPU(s) list: 48-95
Vendor ID: GenuineIntel
Model name: Intel(R) Xeon(R) Platinum 8168 CPU @ 2.70GHz
CPU family: 6
Model: 85
Thread(s) per core: 1
Core(s) per socket: 24
Socket(s): 2
Stepping: 4
BogoMIPS: 5400.00
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid ap
erfmperf pni pclmulqdq dtes64 monitor ds_cpl smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic
movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 i
nvpcid_single pti intel_ppin ssbd mba ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm c
qm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb intel_pt avx512cd avx512bw avx512vl xsaveopt xsavec xg
etbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts pku ospke md_clear flush_l1d
arch_capabilities
Caches (sum of all):
L1d: 1.5 MiB (48 instances)
L1i: 1.5 MiB (48 instances)
L2: 48 MiB (48 instances)
L3: 66 MiB (2 instances)
NUMA:
NUMA node(s): 2
NUMA node0 CPU(s): 0-23
NUMA node1 CPU(s): 24-47
Vulnerabilities:
Itlb multihit: KVM: Mitigation: VMX unsupported
L1tf: Mitigation; PTE Inversion
Mds: Mitigation; Clear CPU buffers; SMT disabled
Meltdown: Mitigation; PTI
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Spectre v2: Mitigation; Retpolines, IBPB conditional, IBRS_FW, RSB filling
Srbds: Not affected
Tsx async abort: Mitigation; Clear CPU buffers; SMT disabled
cat /sys/devices/system/cpu/smt/control
off
[core@host ~]$ sudo echo on > /sys/devices/system/cpu/smt/control
-bash: /sys/devices/system/cpu/smt/control: Permission denied
Why is SMT disabled and how to enable it?
Hypertrading is enabled in the bios.
Fedora release 36 (Thirty Six)
NAME="Fedora Linux"
VERSION="36.20220522.3.0 (CoreOS)"