I would disable hyper-threading. We have 24k+ hosts (Mostly 2650's and 2850's) and saw nothing but problems with hyperthreading on nearly every distro: RH AS 2.1, 3 and SLES 9. In many cases it actually inhibited performance. There is a very small niche of applications that can benefit from hyperthreading. (Our hosts are mostly oracle rac's, application servers, and other various middle-tier applications) Note that the problems with hyper-threading surface under heavy enterprise loads, which of course is where you would need it. Go with AMD and their HypeTransport / dual-core. Much better performance accross the boards IMHO. -rhugga On 11/11/05, Mike Ault <mike@xxxxxxx> wrote: > > As long as you load the SMP version it should see them. If not there is a > relink option to turn on hyperthreading for the CPUs. > > Mike > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto: > redhat-list-bounces@xxxxxxxxxx] > On Behalf Of Robert > Sent: Friday, November 11, 2005 10:13 AM > To: redhat-list@xxxxxxxxxx > Subject: Hyperthreading/Dual core CPU's > > Hi list, > We have plans to buy HP DL380's and put Redhat AS 4.0, anyone know how the > Hyperthreading works on Redhat, can we enable it on Redhat? does it see 2 > CPU's if there is only one CPU board?. > In Windows 2003 we have enabled Hyperthreading and OS sees 4 CPU's (2 CPU > boards). > Thanks in advance > > > > > --------------------------------- > Yahoo! FareChase - Search multiple travel sites in one click. > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list
