This bug has been copied from bug #592021 and has been proposed to be backported to 5.5 z-stream (EUS).
according to 592021#c3, verified patch included in kvm-83-164.el5_5.10 for sanity testing : start 16 guest on 4 cores host, didn't observe large offset(less than 2s) after boot, PASS setting to verified
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2010-0479.html
*** Bug 596623 has been marked as a duplicate of this bug. ***