Thus, it seems to me that despite the fact that the total number of threads is 14, the number of cores is 16. Nevertheless, we get 12 for cpucores() output. In other words, I think the number of physical cores is not correct for this CPU, and cpucores() should return 16 instead.
The output of cpuinfo() is:
Cpu Property Value
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Brand 13th Gen Intel(R) Core(TM) i7-13700KF
Vendor :Intel
Architecture :UnknownIntel
Model Family: 0x06, Model: 0xb7, Stepping: 0x01, Type: 0x00
Cores 12 physical cores, 24 logical cores (on executing CPU)
Hyperthreading hardware capability detected
Clock Frequencies 3400 / 5400 MHz (base/max), 100 MHz bus
Data Cache Level 1:3 : (48, 2048, 30720) kbytes
64 byte cache line size
Address Size 48 bits virtual, 39 bits physical
SIMD 256 bit = 32 byte max. SIMD vector size
Time Stamp Counter TSC is accessible via `rdtsc`
TSC runs at constant rate (invariant from clock frequency)
Perf. Monitoring Performance Monitoring Counters (PMC) revision 5
Available hardware counters per logical core:
3 fixed-function counters of 48 bit width
6 general-purpose counters of 48 bit width
Hypervisor No
and the output of lscpu in Linux Mint 21.2 is:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 39 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 24
On-line CPU(s) list: 0-23
Vendor ID: GenuineIntel
Model name: 13th Gen Intel(R) Core(TM) i7-13700KF
CPU family: 6
Model: 183
Thread(s) per core: 2
Core(s) per socket: 16
Socket(s): 1
Stepping: 1
CPU max MHz: 5400,0000
CPU min MHz: 800,0000
BogoMIPS: 6835.20
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 n
onstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3
dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni xsaveop
t xsavec xgetbv1 xsaves split_lock_detect avx_vnni dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_req umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serial
ize arch_lbr flush_l1d arch_capabilities
Virtualization features:
Virtualization: VT-x
Caches (sum of all):
L1d: 640 KiB (16 instances)
L1i: 768 KiB (16 instances)
L2: 24 MiB (10 instances)
L3: 30 MiB (1 instance)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0-23
Vulnerabilities:
Gather data sampling: Not affected
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Retbleed: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, PBRSB-eIBRS SW sequence
Srbds: Not affected
Tsx async abort: Not affected
We have some machines with the following CPU:
These are advertised as being
16 cores / 24 threadsCPUs (https://www.intel.com/content/www/us/en/products/sku/230490/intel-core-i713700-processor-30m-cache-up-to-5-20-ghz/specifications.html).Thus, it seems to me that despite the fact that the total number of threads is 14, the number of cores is 16. Nevertheless, we get
12forcpucores()output. In other words, I think the number of physical cores is not correct for this CPU, andcpucores()should return16instead.The output of
cpuinfo()is:and the output of
lscpuin Linux Mint 21.2 is: