Re: SMP

[Oleg Krivosheev <kriol@bpmail.fnal.gov>]

On Mon, 21 Feb 2000, Oki DZ wrote:

> 
> On Fri, 18 Feb 2000, Sean Johnson wrote:
> 
> > Phil Brutsche wrote:
> > 
> > > it's one of two ways Linux can use Intel-based SMP systems (the other is
> > > IO-APIC used on PIIs on up, and maybe PPros).
> > 
> > Seems to be on the PPros too....
> > 
> > Intel MultiProcessor Specification v1.1
> >     Virtual Wire compatibility mode.
> > OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
> > Processor #0 Pentium(tm) Pro APIC version 17
> > Processor #1 Pentium(tm) Pro APIC version 17
> > I/O APIC #2 Version 17 at 0xFEC00000.
> > Processors: 2
> > mapped APIC to ffffe000 (fee00000)
> > mapped IOAPIC to ffffd000 (fec00000)
> 
> So, basically you've been running SMP on your dual PPro machine...

hmm...

what is interesting - from my syslog (dual P90)

...
Feb 20 17:40:43 stas kernel: Processor #0 Pentium(tm) APIC version 16
Feb 20 17:40:43 stas kernel: Processor #1 Pentium(tm) APIC version 16
Feb 20 17:40:43 stas kernel: I/O APIC #2 Version 17 at 0xFEC00000.
Feb 20 17:40:43 stas kernel: Processors: 3
Feb 20 17:40:43 stas kernel: mapped APIC to ffffe000 (fee00000)
Feb 20 17:40:43 stas kernel: mapped IOAPIC to ffffd000 (fec00000)
Feb 20 17:40:43 stas kernel: mapped IOAPIC to ffffc000 (fec00000)
...

note the number of CPUs

>  
> > ... the above being snipped from my dmesg
> 
> My dmesg says:
> Linux version 2.2.13 (root@bdg) (gcc version 2.95.2 19991109 (Debian
> GNU/Linux)) #6 SMP Mon Feb 14 16:22:26 JAVT 2000
> mapped APIC to ffffe000 (00229000)
> mapped IOAPIC to ffffd000 (0022a000)
> 
> I need a simple explanation (ie: layman's terms).
> Does this "mapped" thing mean that the multi-processor board is detected?

yes, i think so

what did you get in /proc/interrupts ?

> 
> Oki
> 

OK