CPU Clock Speed in Solaris
Nice Blog at: https://blogs.oracle.com/zerokram/entry/cpu_clock_speed_in_solaris
Sometimes in a multi-cpu/core environment, you might want to check which is the actual speed of the various cores, so a good starting point is the cpu_info module of the kstat command output, which combined with some awk can display exactly what you're looking for;
here is a sample of from an x86_64 machine (actually an old, but still faithful x4150):
# kstat -m cpu_info 5 | awk '/instance/{printf "CPU: %3s ---> ", $4}; /current_clock_Hz/ {print $2/1000000 " MHz"}'
CPU: 0 ---> 2003 MHz
CPU: 1 ---> 2003 MHz