Hi, On 7 May 2009, at 03:55, pluknet wrote: > 2009/5/7 Barney Cordoba <barney_cordoba_at_yahoo.com>: >> >> I just got a shiny new nehalem box and it comes up with 16 >> processors with dual quads installed. Is there any benefit or >> should hyperthreading be disabled? >> > > Hi. There is a measurable win if hyperthreading is enabled [1]. AFAICS the reference doesn't support that conclusion at all. > You can switch it off via machdep.hyperthreading_enabled loader > tunable. > > [1] http://lists.freebsd.org/pipermail/freebsd-stable/2009-January/047460.html -- Bob Bishop rb_at_gid.co.ukReceived on Thu May 07 2009 - 06:39:38 UTC
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