I have HPUX system for which the "top" command displays only 2 CPUs
even though the system has 4 CPUs

Top output
================================================== =================
System: whpnrt57 Tue May 2 1
Load averages: 0.05, 0.08, 0.09
251 processes: 198 sleeping, 51 running, 2 zombies
Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 0.04 3.0% 0.6% 4.8% 91.6% 0.0% 0.0% 0.0% 0.0%
3 0.05 1.6% 2.6% 2.6% 93.2% 0.0% 0.0% 0.0% 0.0%
--- ---- ----- ----- ----- ----- ----- ----- ----- -----
avg 0.05 2.4% 1.6% 3.6% 92.4% 0.0% 0.0% 0.0% 0.0%
================================================== =================

"ioscan -fkC processor" output.
Class I H/W Path Driver S/W State H/W Type Description
================================================== =================
processor 0 120 processor CLAIMED PROCESSOR Processor
processor 1 121 processor CLAIMED PROCESSOR Processor
processor 2 122 processor CLAIMED PROCESSOR Processor
processor 3 123 processor CLAIMED PROCESSOR Processor
================================================== =================

Could you help me to figure out,why is top showing only 2 CPUs

Mehaboob