Comment 2 for bug 1117110

I tried your script on a 2 socket host and 2 cpus with 4 cores.

Result:
Number of CPU sockets used:1

I tried 2 simple debug outputs, perhaps it could help you:

"print $1" before you call "uniq":
0
1
0
1
0
1
0
1

"print $cpusocket" after you call "uniq":
1
1
1
1
1
1
1
1

Kind regars