Date: Mon, 28 May 2007 10:49:16 -0400 From: Boris Kochergin <spawk@acm.poly.edu> Cc: freebsd-bugs@FreeBSD.org, linimon@FreeBSD.org Subject: Re: kern/94410: Cannot disable hyperthreading if more than one physical processor exists Message-ID: <465AEBEC.8070605@acm.poly.edu> In-Reply-To: <E1HscLN-000LxW-Us@dilbert.ticketswitch.com> References: <E1HscLN-000LxW-Us@dilbert.ticketswitch.com>
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Pete French wrote: >> Is this still a problem with recent versions of FreeBSD? >> > > Unfortunbatrly I no longer have any machines with multiple hyperthreading > processors, as we have upgraded all the machines to twin core processors. > Sorry for not being able to give a more recent report on this. > > -pcf. > _______________________________________________ > freebsd-bugs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-bugs > To unsubscribe, send any mail to "freebsd-bugs-unsubscribe@freebsd.org" > I can confirm that it's not a problem in 6.2-RELEASE/amd64. With the machdep.hyperthreading_allowed set to 0, a machine I have with dual hyperthreaded 2.8GHz Xeons will no longer schedule processes for "hyperthreading" CPUs. -Boris
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