yes you fix the affinity of virtual CPU to a physical core so that the vCPUs run only on those cores -
If you find this or any other answer useful please consider awarding points by marking the answer correct or helpful
Here is another good trick you can use for multiple cores from Duncan http://www.yellow-bricks.com/2009/06/04/per-processor-licenses-for-your-application/
If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanks!!!
VMware vExpert 2009
iGeek Systems Inc.
VMware, Citrix, Microsoft Consultant
The short answer is no, Oracle specifically define vmware as 'soft-partitioning' and goes on to note, "soft partitioning is not permitted as a means to determine or limit the number of software licenses required for any given server".
However I've just written about this in this thread, which might help you.
Please award points to any useful answer.