On Wed, Mar 24, 2010 at 1:08 AM, Lei Zhang thestig@google.com wrote:
Even though Nehalem is a better architecture, you don't get the 2x (or better) speed up because the extra 4 cores are from hyperthreading. With 8 real Nehalem cores and -j9, I got 3m24s. With 8 cores + hyperthreading, I get 2m49s.
Is that with -j17 on the latter measurement? Also, what model number CPU is that again? - Dan