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

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

Seems like thunderbird does not like copying from a terminal window. I 
try it again:
Dirk H. Schulz schrieb:

> 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
>
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users


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