Date: Wed, 21 Aug 2002 14:42:06 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Doug White <dwhite@gumbysoft.com> Cc: hackers@freebsd.org Subject: RE: SMP P4 Xeons out there? Message-ID: <XFMail.20020821144206.jhb@FreeBSD.org> In-Reply-To: <20020810160643.I38678-100000@carver.gumbysoft.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 10-Aug-2002 Doug White wrote: > Hey folks, > > Anyone other there with multiprocessor P4 Xeon systems with Hyperthreading > enabled that are seeing 4 CPUs show up on boot? > > If you are, can you mail me the output of 'mptable'? > > It appears you need to enumerate CPUs out of ACPI if you want the logical > CPUs to show up. FreeBSD doesn't appear to support this (yet -- correct me > if I've misread the MP init code), but some people are seeing 4 CPUs > anyway. I'm curious if those systems are modifying the mptable for the > benefit of non-ACPI systems. Newer P4 Xeon's do enumerate all CPU's via the mptable. We use ACPI to enumerate CPU's for ia64 SMP, so at some point it could be backported if needed. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.20020821144206.jhb>