The CPU has got 8 cores (4 "big" high performance, 4 "little" low power), numbered 0 through 7. All cores are single threaded, no SMT - logical cores = physical cores. The cores per socket and sockets values are nonsense, it's only a single socket.
My guess is that virtual sockets are used to distinguish between big and little cores. Why 3*2 = 6 cores are indicated instead of 8 is beyond me. Possibly there are 2 sockets with 2 (big+little) cores each and 1 socket for the DSP.