bash-2.03$ psrinfo -v
Status of virtual processor 0 as of: 05/29/19 19:15:39
  on-line since 07/30/16 17:32:49.
  The sparcv9 processor operates at 1503 MHz,
        and has a sparcv9 floating point processor.
Status of virtual processor 1 as of: 05/29/19 19:15:39
  on-line since 07/30/16 17:32:04.
  The sparcv9 processor operates at 1503 MHz,
        and has a sparcv9 floating point processor.
bash-2.03$ psrinfo -p
1
bash-2.03$ kstat -m cpu_info | nawk '$2=="on-line" {lcpu++} $1=="pg_id" && s[$2]++==0 {core++} END {print core?core+0:lcpu+0}'
2
bash-2.03$ psrinfo
0       on-line   since 11/21/18 09:59:40
1       on-line   since 11/21/18 09:59:38
bash-2.03$
bash-2.03$

From prtdiag -v ===>
==================================== CPUs ====================================
                      E$          CPU     CPU       Temperature         Fan
       CPU  Freq      Size        Impl.   Mask     Die    Ambient   Speed   Unit
       ---  --------  ----------  ------  ----  --------  --------  -----   ----
     MB/P0  1503 MHz  1MB         US-IIIi  3.4       -        -
     MB/P1  1503 MHz  1MB         US-IIIi  3.4       -        -