Don't recognizing SMP...
pisymbol at gmail.com
Thu Apr 17 14:19:15 UTC 2008
On Tue, Apr 8, 2008 at 9:52 AM, John Baldwin <jhb at 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 at bsd.ee> wrote:
> > > On Monday 31 March 2008 12:31:49 한원희 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!
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