Re: [Xen-devel] Re: NUMA and SMP

[Daniel Stodden <stodden@xxxxxxxxxx>]

On Thu, 2007-03-22 at 09:16 +0800, tgh wrote:
> Thank you for reply
> 
> >>>   
> >>>       
> >> that is ,in the smp with adm64,it is a numa in the hardware 
> >> architecture,while a smp in the system software,is it right?
> >>     
> >
> > %}
> > i believe you mean the right thing. it remains a regular smp
> > architecture. system software remains smp.
> >
> >   
> in the linux ,a one node (struct pglist_data) has many zone(struct 
> zone_struct),a zone has many page(struct page),is it right?

right.

> in the smp with adm64 with the hardware of numa, its linux is a smp os 
> ,then there is only one node (struct pglist_data) in the os when running 
> or  there are as many nodes as cpus in the system,  does linux smp 
> support two or more nodes when running? or in this case linux support 
> numa feature?

the number of nodes corresponds to the number of memory areas which
allocators need distinguish. in the case of integrated memory
controllers like amd64, expect to find as many nodes as there are
processors. 

yes, linux has numa support. see linux/Documentation/vm/

daniel

-- 
Daniel Stodden
LRR     -      Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33  3D80 457E 82AE B0D8 735B


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