Date: Fri, 27 Jun 2003 18:39:49 -0500 From: David Leimbach <leimy2k@mac.com> To: Doug White <dwhite@gumbysoft.com> Cc: Glenn Johnson <gjohnson@srrc.ars.usda.gov> Subject: Re: Hyperthreading Message-ID: <A4BE392C-A8F8-11D7-B882-0003937E39E0@mac.com> In-Reply-To: <20030627154252.X5016@carver.gumbysoft.com>
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On Friday, June 27, 2003, at 05:46 PM, Doug White wrote: > On Fri, 27 Jun 2003, Glenn Johnson wrote: > >> I have a P4 processor on order that will support hyperthreading. I >> was >> wondering what the general opinion is on enabling HTT for FreeBSD-5 >> (current). >> >> Thanks for any input. > He didn't ask how... he asked for OPINIONs. Its been my experience that most OSes don't do any better with hyperthreading on.. Now I haven't tried with FreeBSD but at my company we disable hyperthreading in the BIOS by default. Supposedly the brand spanking new Intel chip will have better hyperthreading but the real results remain to be seen. > man 4 smp > > See the machdep.hlt_logical_cpus sysctl. > > -- > Doug White | FreeBSD: The Power to Serve > dwhite@gumbysoft.com | www.FreeBSD.org > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe@freebsd.org"
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