Thank you bakunin and padow for your answer..
I already have the way to identify 55A and 55Q from some guides.
As said by padow, 55A is dual core and 55Q is quad core.
So, by using lscfg -vp, I checked all memories module location.
If the locations contain Px-
C8-Cy and Px-
C9-Cx means there are
2 processor cards.
Then using
Number Of Processors: 4 (this should be the total CPU core) information, I calculate using this formula :
Number of processors / number of processor card
==》
4 / 2 = 2. It means
dual core=
55A
Correct ?