Henrik K wrote: > On Sat, Aug 01, 2009 at 12:04:08AM -0700, Linda Walsh wrote: >> Well -- it's not just the cores -- what was the usage of the cores >> that >> were being used? were 3 out the 8 'pegged'? Are these 'real' cores, >> or >> HT cores? In the Core2 and P4 archs, HT's actually slowed down a >> good many workloads unless they were tightly constructed to work on >> the same >> data in cache. Else, those HT's did just enough extra work to block >> cache contents more than anything else. > > I really doubt there's HT involved in a recent looking 8 core 16GB > machine..
Why not? I have a couple of brandnew Intel Core i7 (Nehalem) systems with 8Gb RAM - they have 1 physical CPU with 4 cores and HT = 8 "cores". And they've got room for more RAM :-) /Per Jessen, Zürich
