If you are facing problems with clock drift in vSMP mode with a SMP guest kernel on a windows host, install the hotfix mentioned in http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=2041.
Read the hotfix and it talks about TSC stuff at the end.
My clock drift problem is gone (or is so minute that I haven't notice it like before when it was 10% faster at best and 100% faster at worst). Good thing is clock=pit is not required anymore. No kernel hacks are required. So, standard stuff should work out of the box.
See this as well: http://www.vmware.com/community/thread.jspa?messageID=413149񤷝