SMP does not work as expected - was: Re: [Xen-users] Checking for SMP usage in xen stable

["Dirk H. Schulz" <dirk.schulz@xxxxxxxxxxxxx>]

Hi folks,

I looked somewhat deeper into the smp issue with Xen 2.0.7. I found that 
smp is used even on machines with only one processor.
This is xm list on an IBM x335, a dual processor board with one processor:

   Name                  Id    Mem(MB)    CPU        State  Time(s)  
Console
   Domain-0            0    123                0            r----  
59931.7       
   webdynown01    5    511                1            -b---    
193.5    9605
   webstatown01    1    255                0            -b---    
202.9    9601
I have configured CPU usage in the domU's config files. So two of one 
CPUs are used, it seems.
This is xm list on a single processor machine:

   Name                  Id        Mem(MB)    CPU        State  
Time(s)  Console
   Domain-0            0        123                0                
r----   5567.2       
   sync01                 2        95                   0            
   -b---      1.8    9602
So it seems that on dual processor boards smp is somehow simulated if 
there is just one processor present.
Is this a bug, or does it make sense somehow?

And now my original question comes up again: How can I - reliably - 
verify that my xen kernel is running smp code?
Dirk

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users