Hyperthreading under Linux 2.6 (article)

[JigaHertz]

http://www.2cpu.com/articles/ht_linux/

"What can we say about hyper-threading performance in Linux at this point? The database performance was what impressed me the most. This is a big win for Intel in my opinion as we saw sizeable gains on all three testbeds when HT was enabled. While the Xeons obliterated the competition even with HT disabled, once we flipped that magical HT switch we saw an additional 25.5% increase in total SELECT queries per second."

 

[TerryMathews]

My only gripe with that article (And it's a small one) is that CONFIG_SMP was set for the non-HT tests. That would add some overhead and slow the machine down. Not much, but a tiny yet measurable bit.

 

[MadRat]

It will be real interesting to see how the 2.6 kernel performs under even larger setups and as memory in the system expands. This kernel is supposed to be radically different than previous versions as far as memory handling for SMP goes.