From: Ian Smith <[email protected]> Subject: Re: HyperThreading makes worse to me (was Re: How to reproduce: Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Corei7 920) Date: Thu, 15 Apr 2010 14:21:30 +1000 (EST)
> Er, shouldn't one of those say HTT on? and/or Turbo boost on? Else > they're both the same test as [4] but with different results? sorry, Turbo Boost off, Hyper threading off: 82% (35GFlops) [1] Turbo Boost off, Hyper threading on: 72% (30.5GFlops) [2] HTT on performs always worse. > Clarification of all four possible test configs - 8 if you add pinning > CPUs or not - might make this a bit clearer? right. Pinning might not be so important I guess. Core i7 is not NUMA. Thanks, -- Nakata Maho http://accc.riken.jp/maho/ , JA OOO http://ja.openoffice.org/ Blog: http://blog.goo.ne.jp/nakatamaho/ , GPG key: http://accc.riken.jp/maho/maho.pgp.txt _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
