How to know architecture of a AIX machine?

We can easily know the architecture type in Linux or Solaris systems with the help of "uname" command. But uname command in AIX don't give relevant information. To know the architecture (PowerPC, rs6000) of your AIX machine, use the following commands.

1) First know the processor characterstics by typing
[root@re-aix02:/] lsdev -Cc processor
proc0 Available 00-00 Processor
From this you know your processor is on "proc0 or proc1"

2) Using the information obtained from 1), know the attribute characteristics for processor
[root@re-aix02:/] lsattr -E -l proc0
state enable Processor state False
type PowerPC_POWER4 Processor type False
frequency 1200000000 Processor Speed False

The second line in output tells about processor architecture.