The mixing of SPARC M5 CMUs and SPARC M6 CMUs is allowed in a server, but mixing is not allowed in a DCU. All CMUs in a DCU must be the same type. Refer to Server Administration, DCU configuration information.
-> show /Servers/PDomains/PDomain_0/System/Processors/CPUs/CPU_x ... model = Oracle SPARC M5 ...
The CPU is a SPARC M5 processor module, so its CMU is a SPARC M5 CMU.
-> show /System/Processors summary_description /System/Processors Properties: summary_description = 28 Oracle SPARC M5 / M6
28 processor modules = 14 CMUs.