On May 9, 2012, at 10:46 AM, Bruce Carter wrote: >> On 9 May 2012, at 10:29 AM, Bruce Carter wrote: >>> I believe that is due to HyperThreading. >> >> Hi Michael and Bruce, >> Thanks for the information. Is this new in Lion? I'm sure I only saw 8 >> cores displayed in Snow Leopard (and earlier). >> Does Lion actually provide a benefit from HyperThreading (and logical >> cores), or is performance the same and only displayed differently? > > The short answer for me is, I don't know. Poking around the web a bit > indicates that the hyperthreading doesn't show unless the system is under > load, but I have no first hand experience to verify this.
This is not new in Lion - my Snow Leopard Core i7 iMac reports the same sort of findings. Note that iStats may not have been up to date when you had it installed on Snow Leopard and at one point it did not support hypertreading. There is also a preference in iStats to not report it as well, I believe. I have a 4-core Core i7 under SL which shows up as 8 CPUs in iStats under SL: http://vjl.li/b8 /vjl/_______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
