nproc_onln            16
cpuid.7.edx[15] hybrid 1

per-CPU CPUID.0x1A core type (0x40 = Core/P, 0x20 = Atom/E):
  cpu0   0x40  P (Core)
  cpu1   0x40  P (Core)
  cpu2   0x40  P (Core)
  cpu3   0x40  P (Core)
  cpu4   0x40  P (Core)
  cpu5   0x40  P (Core)
  cpu6   0x40  P (Core)
  cpu7   0x40  P (Core)
  cpu8   0x20  E (Atom)
  cpu9   0x20  E (Atom)
  cpu10  0x20  E (Atom)
  cpu11  0x20  E (Atom)
  cpu12  0x20  E (Atom)
  cpu13  0x20  E (Atom)
  cpu14  0x20  E (Atom)
  cpu15  0x20  E (Atom)

P-core logical CPUs   8
E-core logical CPUs   8
unknown               0

llama.cpp cpu_get_num_math() would return  4
same walk WITHOUT the ++cpu sibling skip    8