Sounds like the padding stuff is a false sharing issue.  They might want to look into putting 128 bytes of padding between the data structures as well: <a href="http:&#x2F;&#x2F;www.forwardscattering.org&#x2F;post&#x2F;29" rel="nofollow">http:&#x2F;&#x2F;www.forwardscattering.org&#x2F;post&#x2F;29</a>