Re: 64 bits or 32 bits? How to define?

[cs <cs@networkingnewsletter.org.uk>]

On Thu, 2007-11-15 at 11:05 +0000, michael wrote:
> On Thu, 2007-11-15 at 00:56 +0100, Gilles Mocellin wrote:
> > Le Wednesday 14 November 2007 21:57:20 Pantor, vous avez écrit :
> > > Exactly yes, CPU is AMD Athlon XP-M 2800+ and no idea is it 64 bits or
> > > 32 bits CPU.
> > 
> > It is 64bits if you see lm (Large Mode) in :
> > $ grep flags /proc/cpuinfo
> > flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
> > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm 
> > constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
> > flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
> > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm 
> > constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
> > 
> > Here, it was a core 2 Duo (2 line because 2 cpu).
> > There is lm.
> > 
> > 
> 
> I don't think that's correct.
> 
> Output from my 32 bit Xeon:
> michael@ratty:~$ grep flags /proc/cpuinfo
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
> constant_tsc pni monitor ds_cpl cid cx16 xtpr
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
> constant_tsc pni monitor ds_cpl cid cx16 xtpr
> 
> has 'lm' 
> 
> So I'm unsure what's happening here!
> 

actually I've just been corrected - it seems from `dmesg` that II've a
Xeon with sSpec=SL7PE which appears to have EM64T so I guess it does
support 64 bit computing.

although I've always thought it was 32 bit and everything on it seems to
be!

cheers, Michael