Date: Mon, 15 Dec 2003 15:27:30 -0600 From: "Minnesota Slinky" <mnslinky@yahoo.com> To: "'Stefan Cars'" <stefan@snowfall.se>, "'Rob'" <nospam@users.sourceforge.net> Cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Message-ID: <000501c3c352$429c73f0$6401a8c0@Nomad> In-Reply-To: <20031214120552.0091C75CB@mail.snowfall.se>
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Actually, my bad, it's not in there until 5.x Eric F Crist President AdTech Integrated Systems, Inc (612) 998-3588 -----Original Message----- From: Stefan Cars [mailto:stefan@snowfall.se] Sent: Sunday, December 14, 2003 6:06 AM To: 'Minnesota Slinky'; 'Rob' Cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Hi! That was removed, it's not in 4.9! / Stefan -----Original Message----- From: Minnesota Slinky [mailto:mnslinky@yahoo.com] Sent: den 14 december 2003 01:13 To: 'Stefan Cars'; 'Rob' Cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading I _believe_ there is an options HT #for HyperThreading In the kernel configuration. HTH Eric F Crist President AdTech Integrated Systems, Inc (612) 998-3588 -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Stefan Cars Sent: Saturday, December 13, 2003 1:58 PM To: 'Rob' Cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Hi! This is strange, my system doesn't even show mchdep.hlt_logical_cpus, very weird. My system have HT /S -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Rob Sent: den 12 december 2003 15:58 To: freebsd-questions@freebsd.org Subject: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Hello, Recently I've got a new PC: P4 Titan 2.6 GHz. It says in the brochure that it has "HyperThreading", which I think is somehow related to the HyperThread thing in the FreeBSD kernel, right? I know there's this message in /usr/src/UPDATING, which unfortunately does not clear up the matter for me. So let me recap what I believe to understand: For utilizing the advantages of this HyperThreading stuff for users, I need in the kernel configuration: options SMP # Symmetric MultiProcessor Kernel options APIC_IO # Symmetric (APIC) I/O Furthermore, I need to set "machdep.hlt_logical_cpus" to 0 (zero). How do I add this to "the loader" so that it is set to zero at every boot up? Should I simply add to my /boot/loader.conf a line like: machdep.hlt_logical_cpus="0" After that, I'm done with the hyperthreading? Thanks, Rob. PS: if you're in the mood, I would appreciate a few words on what this HyperThreading is about and what advantages I can expect. Thanks too! _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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