Date: Thu, 25 Aug 2005 20:15:22 +0200 From: Andre Oppermann <andre@freebsd.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: "Justin R. Smith" <jsmith@drexel.edu>, freebsd-current@FreeBSD.org Subject: Re: Hyperthreading degrades performance? Message-ID: <430E0ABA.7080600@freebsd.org> In-Reply-To: <20050825191230.C16967@fledge.watson.org> References: <430DF217.2020908@drexel.edu> <20050825173440.O16967@fledge.watson.org> <430E09F8.8090001@freebsd.org> <20050825191230.C16967@fledge.watson.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Robert Watson wrote: > > On Thu, 25 Aug 2005, Andre Oppermann wrote: > >> Don't forget better PIV revisions with larger instruction decoder >> caches, better cache prefetching and branch prediction. I doubt much >> of the improvement is due to our SMP changes. A real test to find out >> whether it's our work or Intels would be to benchmark an old (pre >> Nacona) PIV running 5.3R and 7.0-current vs. a new one doing the same. > > Well, given that my test box for this hasn't changed in three years, I > think I can safely argue it's not the hardware :-). Ok, you win. :-) Then the effect of HTT should be much better if you would pop in one of the latest PIV revisions. -- Andre
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?430E0ABA.7080600>