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On Thursday 21 July 2005 14:28, Shahzad Chohan wrote:
> I'm trying to work on multiple things, basically in this case when I
> boot up with the 2.6.11 xen kernel, it only see's one cpu, I thought
> that xen by default was smp enabled. How can I enable smp support for
> the xen0 kernel?

xen is smp enabled, but only the hypervisor itself, not the guests.
so if you have 4 CPUs, you can run 4 guests and each will have its own CPU,
but (currently) you can't assign more than one CPU to a guest.

Its a planned feature however, maybe its working in some xen-unstable
snapshots ...

/Ernst

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On 7/21/05, Ernst Bachmann <e.bachmann@xebec.de> wrote:
> On Thursday 21 July 2005 14:28, Shahzad Chohan wrote:
> > I'm trying to work on multiple things, basically in this case when I
> > boot up with the 2.6.11 xen kernel, it only see's one cpu, I thought
> > that xen by default was smp enabled. How can I enable smp support for
> > the xen0 kernel?
>
> xen is smp enabled, but only the hypervisor itself, not the guests.
> so if you have 4 CPUs, you can run 4 guests and each will have its own CPU,
> but (currently) you can't assign more than one CPU to a guest.
>
> Its a planned feature however, maybe its working in some xen-unstable
> snapshots ...
>
Hi

Sorry what I meant was that after bootup into the xen0 kernel I can
only see 1 cpu, I've attached my cpu list below. This server has two
spu's but only on eis being shown

cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 3.06GHz
stepping : 5
cpu MHz : 3065.877
cache size : 512 KB
fdiv_bug : no
hlt_bug : yes
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips : 6121.06

Any ideas?

Thanks
Shaz

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On Thursday 21 July 2005 14:45, Shahzad Chohan wrote:

> Hi
>
> Sorry what I meant was that after bootup into the xen0 kernel I can
> only see 1 cpu, I've attached my cpu list below. This server has two
> spu's but only on eis being shown
>
> cat /proc/cpuinfo
> processor : 0
...
> Any ideas?
>
> Thanks
> Shaz

xen0 is just another guest within xen, so its the same as with xenUs. Only one
CPU for each guest.

from a dual xeon with HyperThreading enabled:

cat /proc/cpuinfo shows just ONE cpu (in xen0 and each xenU),

but "xm info" shows:
...
machine : i686
cores : 2
hyperthreads_per_core : 2
...

makes 4 CPUs total.

# xm list
Name Id Mem(MB) CPU State Time(s) Console
Domain-0 0 120 0 r---- 14734.5
db01 8 511 1 -b--- 275.6 9608
db02 3 511 3 -b--- 13786.0 9603

Shows CPU's 0,1,3 in use with CPU 2 currently unused.

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On 7/21/05, Ernst Bachmann <e.bachmann@xebec.de> wrote:
> On Thursday 21 July 2005 14:45, Shahzad Chohan wrote:
>
> > Hi
> >
> > Sorry what I meant was that after bootup into the xen0 kernel I can
> > only see 1 cpu, I've attached my cpu list below. This server has two
> > spu's but only on eis being shown
> >
> > cat /proc/cpuinfo
> > processor : 0
> ...
> > Any ideas?
> >
> > Thanks
> > Shaz
>
> xen0 is just another guest within xen, so its the same as with xenUs. Only one
> CPU for each guest.
>
> from a dual xeon with HyperThreading enabled:
>
> cat /proc/cpuinfo shows just ONE cpu (in xen0 and each xenU),
>
> but "xm info" shows:
> ...
> machine : i686
> cores : 2
> hyperthreads_per_core : 2
> ...
>
> makes 4 CPUs total.
>
> # xm list
> Name Id Mem(MB) CPU State Time(s) Console
> Domain-0 0 120 0 r---- 14734.5
> db01 8 511 1 -b--- 275.6 9608
> db02 3 511 3 -b--- 13786.0 9603
>
> Shows CPU's 0,1,3 in use with CPU 2 currently unused.
>

Great

Thanks for that.

Shaz

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