Date: Fri, 31 Jan 2003 15:05:30 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: freebsd-current@FreeBSD.ORG, Trish Lynch <trish@bsdunix.net>, "Daniel C. Sobral" <dcs@tcoip.com.br> Subject: Re: Hyperthreading and machdep.cpu_idle_hlt Message-ID: <XFMail.20030131150530.jhb@FreeBSD.org> In-Reply-To: <200301311908.h0VJ8cNZ007396@apollo.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 31-Jan-2003 Matthew Dillon wrote: > >:AFAIK, full hyperthreading support, as it is, has been merged to >:-stable. It consists of a patch to recognize the virtual CPUs, so they >:will be dealt with like any SMP system, as long as HTT is enabled on the >:BIOS. >: >:-- >:Daniel C. Sobral (8-DCS) >:Gerencia de Operacoes > > Yah. Shoot, well this Sony VAIO desktop has a P4 with HTT set in > it, but it doesn't have an APIC, the BIOS is clueless, and there > is no mptable, so I guess I am S.O.L. in regards to using hyperthreading > on this box. HTT set just means that you can check the value returned in %ebx from cpuid 1 to get the number of cores that your CPU contains. It most likely contains the value '1'. Only Xeons and very recent desktop P4's have multiple cores. -- 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-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.20030131150530.jhb>