[libvirt-users] Can I configure cores instead of CPU's
Todd And Margo Chester
toddandmargo at gmail.com
Mon Dec 5 00:32:03 UTC 2011
> On 3/12/2011 9:53 AM, Todd And Margo Chester wrote:
>>> -------- Original message --------
>>> Subject: Re: [libvirt-users] Can I configure cores instead of CPU's
>>> From: Todd And Margo Chester<toddandmargo at gmail.com>
>>> To: "libvirt-users at redhat.com"<libvirt-users at redhat.com>
>>> CC:
>>>
>>>
>>> Hi All,
>>>
>>> Scientific Linux 6.1 x64
>>> qemu-kvm-0.12.1.2-2.160.el6_1.2.x86_64
>>>
>>> My XP-Pro guest will only let me use two CPUs.
>>> Is there a way I can tell Virt-Manager to use
>>> one CPU with six cores instead of four separate
>>> CPUs?
>>>
>>> I can manually insert things with
>>> virsh edit KVM-WinXP
>>>
>>> Currently, I have:
>>> <vcpu>6</vcpu>
>>>
>>> I found an example of a run string:
>>>
>>> -smp 2,sockets=2,cores=1,threads=1
>>>
>>> But I will be darned if I can figure out the virsh xml syntax.
>>>
>>> Many thanks,
>>> -T
>> On 12/02/2011 05:32 PM, Frank Hauptle wrote:
>> > Yes under advanced in cpu in virt manager are socket /core
>> > settings. i use a fedora virt manager to connect to sl61
>> > libvirt. more options that way.
>>
>>
>> I configured my processor in virt-mamager:
>>
>> CPU's: Current Allocation: 2
>> Manual set CPU Topology:
>> Sockets: 1
>> Cores: 6
>> Threads: 1
>>
>> or from my XML file
>>
>> <vcpu>1</vcpu>
>> <cpu>
>> <topology sockets='1' cores='6' threads='1'/>
>> </cpu>
>>
>> I still get two CPUs in my guest XP-Pro.
>>
>> What am I doing wrong?
>>
>> -T
On 12/03/2011 07:40 PM, Frank Hauptle wrote:
>I'm not even sure XP could differentiate
> between a core and a socket as multicore CPU's were not common to x86 in
> 2000 when XP was released.
>
> If you want to see if it really worked, download a knoppix CD and mount
> the ISO in the CDrom of that
> VM, then set it to boot from the CDROM.
>
> When knoppix boots up, open a terminal and type:
>
> cat /proc/cpuinfo
>
> See what it gives you.
>
> I think the hardware info GUI app in knoppix will give you more info too.
>
> cheers
>
>
> Frank
Hi Frank,
Don't have knoppix, but do have FC16-Live-CD.
The rules for CPU count in XP-Pro are as follows: the
physically chip that you install on your motherboard is
referred to by M$ as a CPU. XP-Pro will only allow up to
two CPUs. Each physical CPU may have as many processors
on it as will fit. M$ calls these processors "cores".
XP-Pro does not limit cores as long as they do not span
more than two CPU's.
My host machine has one CPU and four cores (eight if
you consider the hyperthreading).
KVM is presenting my XP-Pro guest multiple CPUs, not cores.
XP will not use more than two CPUs by design.
What I am after is a way to have KVM present my guest
one CPU with four cores. Not four independent CPUs.
I have attached /proc/cpuinfo from Fedora Core 16
guest, along with my /proc/cpuinfo from my host.
What am I doing wrong?
Many thanks,
-T
---->> cat /proc/cpuinfo from FC16 Guest:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version (cpu64-rhel6)
stepping : 3
cpu MHz : 3067.098
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36
clflush mmx fxsr sse sse2 syscall nx lm nopl pni cx16 hypervisor lahf_lm
bogomips : 6134.19
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version (cpu64-rhel6)
stepping : 3
cpu MHz : 3067.098
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36
clflush mmx fxsr sse sse2 syscall nx lm nopl pni cx16 hypervisor lahf_lm
bogomips : 6134.19
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version (cpu64-rhel6)
stepping : 3
cpu MHz : 3067.098
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36
clflush mmx fxsr sse sse2 syscall nx lm nopl pni cx16 hypervisor lahf_lm
bogomips : 6134.19
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version (cpu64-rhel6)
stepping : 3
cpu MHz : 3067.098
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36
clflush mmx fxsr sse sse2 syscall nx lm nopl pni cx16 hypervisor lahf_lm
bogomips : 6134.19
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---->> cat /proc/cpuinfo from Local Host (i7-960)
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6134.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 4
initial apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.40
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 4
apicid : 6
initial apicid : 6
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.38
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 5
initial apicid : 5
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
stepping : 5
cpu MHz : 1600.000
cache size : 8192 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 4
apicid : 7
initial apicid : 7
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp
lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips : 6132.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
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