virtualized guest use only 2 cores

[Frantisek Hanzlik]

Gilboa Davara wrote:
> On Fri, Oct 18, 2013 at 1:45 PM, Frantisek Hanzlik <franta at hanzlici.cz> wrote:
>>
>> Not sure if it is Fedora/KVM problem, but:
>> I'm trying virtualize MS Win7 Pro 64 guest under Fedora 19 x86_64 host.
>> In virt-manager I allocated 4 cores (host machine has Xeon E3-1230 CPU
>> with 8 cores incl. hyperthreading) to guest. But after installation
>> guest OS uses only two cores - as report its task manager and OS
>> properties info page. But what is weird, its device manager report all
>> cores (see attached picture - where I increased no. of cores to 6,
>> again without increased number of used cores). Guest OS should support
>> up to 4 cores, according to manufacturer:
>> http://technet.microsoft.com/cs-CZ/library/cc794868.aspx
>>
>> But from this referenced URL it seems as they are considering hyper-v
>> as virt. supervisor - maybe then this result be some KVM problem or
>> nature?
>>
>> TIA, Franta Hanzlik
>>
>>
> 
> Please post the output of:
> $ for PID in $(pgrep qemu-system) ; do echo $PID ; cat
> /proc/$PID/cmdline ; echo ; done
> 
> - Gilboa

This is output (there run only this one guest):

1447
/usr/bin/qemu-system-x86_64-machineaccel=kvm-namew7-64-sql-jana-S-machinepc-i440fx-1.4,accel=kvm,usb=off-cpuSandyBridge,+erms,+smep,+fsgsbase,+rdrand,+f16c,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme-m4096-smp6,sockets=6,cores=1,threads=1-uuidba471904-759f-a14d-d6a9-c19874cc0904-no-user-config-nodefaults-chardevsocket,id=charmonitor,path=/var/lib/libvirt/qemu/w7-64-sql-jana.monitor,server,nowait-monchardev=charmonitor,id=monitor,mode=control-rtcbase=localtime-no-shutdown-devicepiix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2-devicevirtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5-drivefile=/mnt/virtualy/images/w7-64-sql-jana,if=none,id=drive-virtio-disk0,format=raw-devicevirtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1-driveif=none,id=drive-ide0-0-0,readonly=on,format=raw-deviceide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0-netdevtap,fd=24,id=hostnet0,vhost=o!
 n,vhostfd=
25-devicevirtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:21:e1:56,bus=pci.0,addr=0x3-chardevpty,id=charserial0-deviceisa-serial,chardev=charserial0,id=serial0-chardevspicevmc,id=charchannel0,name=vdagent-devicevirtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0-deviceusb-tablet,id=input0-spiceport=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on-vgaqxl-globalqxl-vga.ram_size=67108864-globalqxl-vga.vram_size=67108864-deviceintel-hda,id=sound0,bus=pci.0,addr=0x4-devicehda-duplex,id=sound0-codec0,bus=sound0.0,cad=0-devicevirtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6

#------------------
Or cutted one par/line:

/usr/bin/qemu-system-x86_64
 -machine accel=kvm -name w7-64-sql-jana -S
 -machine pc-i440fx-1.4,accel=kvm,usb=off
 -cpu SandyBridge,+erms,+smep,+fsgsbase,+rdrand,+f16c,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 4096 -smp 6,sockets=6,cores=1,threads=1
 -uuid ba471904-759f-a14d-d6a9-c19874cc0904
 -no-user-config
 -nodefaults
 -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/w7-64-sql-jana.monitor,server,nowait
 -mon chardev=charmonitor,id=monitor,mode=control
 -rtc base=localtime
 -no-shutdown
 -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5
 -drive file=/mnt/virtualy/images/w7-64-sql-jana,if=none,id=drive-virtio-disk0,format=raw
 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
 -drive if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0
 -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25
 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:21:e1:56,bus=pci.0,addr=0x3
 -chardev pty,id=charserial0
 -device isa-serial,chardev=charserial0,id=serial0
 -chardev spicevmc,id=charchannel0,name=vdagent
 -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
 -device usb-tablet,id=input0
 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on
 -vga qxl
 -global qxl-vga.ram_size=67108864
 -global qxl-vga.vram_size=67108864
 -device intel-hda,id=sound0,bus=pci.0,addr=0x4
 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6