Here is 4 CPU, 16 cores...
$ prtdiag -v
System Configuration: Sun Microsystems sun4u SPARC Enterprise M9000 Server
System clock frequency: 960 MHz
Memory size: 20480 Megabytes
==================================== CPUs ====================================
CPU CPU Run L2$ CPU CPU
LSB Chip ID MHz MB Impl. Mask
--- ---- ---------------------------------------- ---- --- ----- ----
00 2 16, 17, 18, 19 2280 5.0 6 146
02 1 72, 73, 74, 75 2280 5.0 6 146
03 2 112, 113, 114, 115 2280 5.0 6 146
04 3 152, 153, 154, 155 2280 5.0 6 146
