On Sat, May 28, 2005 at 09:45:52AM -0400, Louis LeBlanc wrote: > On 05/27/05 09:28 PM, Mike Tancsa sat at the `puter and typed: > > On Fri, 27 May 2005 09:30:46 -0500, in sentex.lists.freebsd.questions > > you wrote: > > >> > > >> Oh, wait, it is probably just the last HT security patch, > > >> ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.asc. > > > > > >hmm... So basically, SMP can be enabled, but it won't use HT even if it > > >sees a capable processor? > > > > Unless you use the ULE scheduler (which is broken and buggy on > > RELENG_5) there is no benefit to using HT. In fact, it will make some > > things worse. > > Are you sure about that? I'm using the BSD scheduler on 5.3 > (upgrading to 5.4 later today), with HT enabled, and I don't have > problems. In fact, I can do a make buildworld AND play neverwinter > nights at the same time without seeing any problems.
He means that some workloads will be slower with HT than without. It's very much workload-specific though, so you have to test and see how it performs for you. Kris
pgpWdqZsv14js.pgp
Description: PGP signature