On Sat, 02 Oct 2010 20:42:01 -0500, Mark wrote in message <4ca7df69.7040...@allums.com>:
> On 10/2/2010 6:08 PM, Nathen wrote: > > Pretty simple question really, does Debian i.e. the current Linux > > Kernel handle hyperthreading well? I have a server running on an > > Intel Atom D510, should I have HT enabled or disabled to get the > > best performance? > > Thanks. :) > > > > > > > Recently (kernel 2.6.31 or so) there has been a separate kernel > configuration option to optimize for SMT (Intel's word for it is > "hyperthreading"). Separate from SMP (multiple processor). Under > SMT, a single core running two threads looks like two cores to most > of the kernel itself and to user programs. This has been true for a > long time. Only now, there is more support and optimization for it. > If your kernel has it enabled, some workloads won't see any > difference, but some will benefit a lot. I think it is enabled by > default in the most recent stock kernels (please correct me if I'm > wrong.) > > Note, you may need to enable hyperthreading in your BIOS, as well. > > I would enable it for Core i7 and Atom. P4-era machines could > sometimes have software compatibility issues with it enabled, ..details, please, I'm trying to figure out what I did wrong in my X|dri|etc setup on my FlightGear P4. > but I think Debian and Atoms are good. -- ..med vennlig hilsen = with Kind Regards from Arnt... ;o) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20101024210729.5a6f6...@a45.fmb.no
