Date: Sun, 21 Dec 2008 17:26:54 -0600 From: "Sam Fourman Jr." <sfourman@gmail.com> To: michael <michael.copeland@gmail.com> Cc: Brett Glass <brett@lariat.net>, freebsd-questions@freebsd.org Subject: Re: Status of hyperthreading in FreeBSD Message-ID: <11167f520812211526h55a56a91ue4c06c02a170f439@mail.gmail.com> In-Reply-To: <494D5B32.50806@gmail.com> References: <200812202039.NAA10290@lariat.net> <494D5B32.50806@gmail.com>
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>> > as far as i know, just enabling smp will allow ht to function. also, i don't > know if intel changed ht in the new atom processor, they could have. >> is FreeBSD's smp special in some way that it would be the exception to the following statement. I know there was a lot of changes made in the new ULE2 scheduler maybe that is why? /* Hyper-threading relies on support in the operating system as well as the CPU. Conventional multiprocessor support is not enough to take advantage of hyper-threading.[1] For example, even though Windows 2000 supports multiple CPUs, Intel does not recommend that hyper-threading be enabled under that operating system. */ I found this in wikipedia at the following link http://en.wikipedia.org/wiki/Hyper-threading Sam Fourman Jr. Fourman Networks
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