Date: Wed, 5 Oct 2005 12:38:36 -0600 From: "Chad Leigh -- Shire.Net LLC" <chad@shire.net> To: Pranav Peshwe <pranavpeshwe@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD and Intel Hyperthreading technology. Message-ID: <458E801D-BB49-4918-9426-66986DDFB7F5@shire.net> In-Reply-To: <00a601c5c9d5$12c45180$fefefe0a@theone> References: <00a601c5c9d5$12c45180$fefefe0a@theone>
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On Oct 5, 2005, at 11:48 AM, Pranav Peshwe wrote: > Hello, > I have an Intel P4 2.8Ghz processor with Hyperthreading > (HT). > The dmesg displays a message saying HT is present and 2 logical > CPUs present.I tried toggling the setting in BIOS but no difference. > How does the FBSD(v5.4 stable) kernel deal with HT ? Do the > internal > workings( maybe locking, per processor data or other things) change as > compared to a simple non-HT processor ? or does it use employ SMP > methods to deal with the 2 logical CPUs presented by a HT processor ? > > I want to do kernel programming on FBSD and my project partners have > non-HT CPUs.How much difference will HT make ? can it be avoided ? I would suspect that if you do not run an SMP kernel it won't matter Chad --- Chad Leigh -- Shire.Net LLC Your Web App and Email hosting provider chad@shire.net
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