http://www-106.ibm.com/developerworks/linux/library/l-htl/?ca=dgr-lnxw01HyperThread#resources
"Intel Xeon Hyper-Threading is definitely having a positive impact on Linux kernel and multithreaded applications. The speed-up from Hyper-Threading could be as high as 30% in stock kernel 2.4.19, to 51% in kernel 2.5.32 due to drastic changes in the scheduler run queue's support and Hyper-Threading awareness. ..." This article was linked from Slashdot. scott
