If the corresponding physical entity has not executed this
test since the last restart, then the value of this object will
be '0'.
If the value of ceDiagTestPerfLastResult is 'fail', then this
object specifies the error associated with the failure.
This object will be have the value of '0' under the following
circumstances:
1) the value of ceDiagTestPerfLastResult is 'pass' or
'unknown'.