Date: Thu, 17 Apr 2008 10:12:57 -0400 From: "Alexander Sack" <pisymbol@gmail.com> To: "John Baldwin" <jhb@freebsd.org> Cc: Andrei Kolu <antik@bsd.ee>, freebsd-stable@freebsd.org Subject: Re: Don't recognizing SMP... Message-ID: <3c0b01820804170712t42518efy94628bcbc77aee1d@mail.gmail.com> In-Reply-To: <200804080952.00483.jhb@freebsd.org> References: <d6a9902d0803310231h76134cf7n4b464ba47a8acc8f@mail.gmail.com> <200804011243.06122.antik@bsd.ee> <3c0b01820804071145t5bfcd01al55f70ce7f1826b19@mail.gmail.com> <200804080952.00483.jhb@freebsd.org>
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On Tue, Apr 8, 2008 at 9:52 AM, John Baldwin <jhb@freebsd.org> wrote: > On Monday 07 April 2008 02:45:47 pm Alexander Sack wrote: > > On Tue, Apr 1, 2008 at 5:43 AM, Andrei Kolu <antik@bsd.ee> wrote: > > > On Monday 31 March 2008 12:31:49 ÇÑ¿øÈñ wrote: > > > > I installed FreeBSD 7.0 on HP DL 380. > > > > > > > > This is a mptable result. > > > > > > > > > # mptable > > > > > Processors: APIC ID Version State Family Model Step > > > > > Flags 0 0x14 BSP, usable 6 2 1 0x0381 > > > > > 6 0x14 AP, usable 15 2 9 0xbfebfbff > > > > > > > > 2 way cpus are same as 3.0GHz Xeon CPU. But they have different > > > > Family, Step, and Flags. > > > > > > SMP does NOT work with cpus with different steppings. You should find > > > other matching pair for smp to work. > > > > Then this needs to be FIXED because MANY OEMs ship mixed stepping > > processors as Intel now supports it.... > > FreeBSD itself doesn't enforce this, we use whatever CPUs we find in the table > and we don't actually bother reading the family/model/etc. from the APs at > all. Assuming this is a non-ancient computer and non-ancient FreeBSD (5.2 or > later) then FreeBSD isn't using the MP Table at all but the ACPI MADT table > (available via acpidump -t). I would assume that as well. Yes it matters what steppings are mixed in terms of support but Intel DOES support a number of mixed steppings and OEMs like HP have shipped mixed stepping Proliant machines (I was on the fore-front of this issue with another platform so I know this to be fact). In fact there is some public documentation about this is you can stand Intel's search feature on their website.... :D! -aps
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