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[ugvddm <zhengguangou@xxxxxxxxx>]

Hi Jon:

I have tested your issue, but I can't reproduce it. I use below flavor
to create a vm with 3vcpus in a host with 8 vcpus

+----------------------------+----------------------------------------------+
| Property                   | Value                                        |
+----------------------------+----------------------------------------------+
| OS-FLV-DISABLED:disabled   | False                                        |
| OS-FLV-EXT-DATA:ephemeral  | 0                                            |
| disk                       | 1                                            |
| extra_specs                | {"hw:cpu_cores": "1", "hw:cpu_sockets": "3"} |
| id                         | 4c8ffddf-1a07-4aea-bb44-687fc9c6ae46         |
| name                       | m1.tiny                                      |
| os-flavor-access:is_public | True                                         |
| ram                        | 512                                          |
| rxtx_factor                | 1.0                                          |
| swap                       |                                              |
| vcpus                      | 3                                            |
+----------------------------+----------------------------------------------+

then , I can see the extra_specs whic I set work to vm:
/usr/bin/kvm-spice -S -M pc-1.1 -enable-kvm -m 512 -smp 3,sockets=3,cores=1,threads=1 -name instance-00000004 -uuid b7198295-3667-4abe-b9d4-07fb5e977550 -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack ......

In additon, I see below log from nova-compute.log:
AUDIT nova.compute.resource_tracker [-] Free VCPUS: 5


** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1355921

Title:
  [libvirt] When guest configured for threads, poor VCPU accounting

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  Noticed while testing:  https://blueprints.launchpad.net/nova/+spec
  /virt-driver-vcpu-topology

  
  I have a host advertising 16 VCPUs (2 sockets, each 8 cores).   Each core happens to have 8 threads.    (This is on a beefy POWER8 system).    With the above blueprint,  I can now create a 1 socket, 2 core, 8 thread guest.    

  All works fine, except that I noticed "Free VCPUS:  0' even though I'm
  really only using two cores.    I'd think I would see 14 free VCPUs in
  this scenario.

  Guest lscpu output: 
  [root@bare-precise ~]# lscpu
  Architecture:          ppc64
  CPU op-mode(s):        32-bit, 64-bit
  Byte Order:            Big Endian
  CPU(s):                16
  On-line CPU(s) list:   0-15
  Thread(s) per core:    8
  Core(s) per socket:    2
  Socket(s):             1
  NUMA node(s):          1
  Model:                 IBM pSeries (emulated by qemu)
  L1d cache:             64K
  L1i cache:             32K
  NUMA node0 CPU(s):     0-15

  Resulting tracker
  2014-08-12 12:17:18.874 96650 AUDIT nova.compute.resource_tracker [-] Free VCPUS: 0

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