Re: [libvirt-users] LibVirt query CPU Model support and restore operation
hi ,
yes you were correct . Model should as per qemu-kvm binary. thanks .
/usr/libexec/qemu-kvm -name compute-0 -S -machine
pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Haswell,+rtm,+hle -m 61440
-realtime mlock=off
This time KVM is invked with cpu model HAswell.
Also from proc
rocessor : 19
vendor_id : GenuineIntel
cpu family : 6
model : 60
*model name : Intel Core Processor (Haswell)*
stepping : 1
microcode : 0x1
cpu MHz : 1995.110
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc
rep_good nopl eagerfpu pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic
popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm xsaveopt
Akhilesh
On Fri, Jan 27, 2017 at 3:23 PM, Jiri Denemark <jdenemar(a)redhat.com> wrote:
On Fri, Jan 27, 2017 at 13:48:44 +0530, akhilesh rawat wrote:
> hello ,
>
> thanks for comments .
>
> I tried now with force options for CPU flag which were not supported .
Now
> the command with non fully supported CPU model gets executed , But i am
> surprised to see that still Guest cpu model is not changed and still
same
> as host cpu model(SAndy Bridge)
>
> Why don't i see the model as HAswell now , could you please comment.
>
> Command used :
>
> virt-install --virt-type kvm --name controller-0 --cpu
> Haswell-noTSX,+fma,+movbe,+fsgsbase,+bmi1,+avx2,+smep,+
bmi2,+erms,+invpcid
> --ram=8120 --vcpus=4,sockets=1
>
> Linux process for KVM :
>
> 7479 1 37 10:13 ? 01:13:21 /usr/libexec/qemu-kvm -name
> controller-0 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off *-cpu
> SandyBridge,*+fma,+pcid,+movbe,+fsgsbase,+bmi1,+avx2,+
smep,+bmi2,+erms,+invpcid
> -m 8120 -realtime mlock=off -smp 4,sockets=1,cores=4,threads=1
Your qemu-kvm binary apparently doesn't know what Haswell-noTSX is and
thus libvirt has to translate it to something QEMU understands. You can
check supported CPU models with "/usr/libexec/qemu-kvm -cpu ?" (make
sure the question mark is not expanded by the shell).
Jirka
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