The context switches don't have the same overhead when you switch between virtual cores - but they can will still eat up time. For a single application, using hyperthreading only slows things down. You don't want to enable hyperthreading unless you have seperate apps that will use the virtual cores.
One single app on two virtual cores will not run as fast as one app on one single physical core with hyperthreading disabled, even if the app supports multi threading. ----- Original Message ----- From: "Luigi" <lu...@my-don.de> To: "Half-Life dedicated Linux server mailing list" <hlds_linux@list.valvesoftware.com> Sent: Wednesday, September 23, 2009 9:53 PM Subject: Re: [hlds_linux] Hyper Threading on Core i7 > Problem with ht is that you are running 2 cores on one Core. This > Jeans many contextswitches for the os which decrease performance. > > MfG > Luigi > > On 24.09.2009, at 01:19, Chris Green <cgr...@valvesoftware.com> wrote: > >> Enable. For apps that it works well with, in the best case, >> hyperthreading on the i7 can turn your 4-core system into the >> equivalent of a 6-core one. >> >> >> -----Original Message----- >> From: hlds_linux-boun...@list.valvesoftware.com [mailto:hlds_linux- >> boun...@list.valvesoftware.com] On Behalf Of Nander Paardekooper >> Sent: Tuesday, September 22, 2009 9:10 AM >> To: Half-Life dedicated Linux server mailing list >> Subject: Re: [hlds_linux] Hyper Threading on Core i7 >> >> Disabling it, i guess this will be better. Since it is not an >> physical core. >> >> But i haven't tried it yet, so, be the first ;). >> >> Ulrich Block schreef: >>> Using a Core i7 Hyperthreading returns. What is you opinion with >>> srdcs >>> Server. Disable or enable Hyperthreading? >>> >>> _______________________________________________ >>> To unsubscribe, edit your list preferences, or view the list >>> archives, please visit: >>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list >> archives, please visit: >> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list >> archives, please visit: >> http://list.valvesoftware.com/mailman/listinfo/hlds_linux > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, > please visit: > http://list.valvesoftware.com/mailman/listinfo/hlds_linux _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlds_linux
