Open Stack

Hi All,


I am using Kilo release 1:2015.1.4-0ubuntu2 for my lab deployment on single
physical host. The issue is that I am getting very low performance when I
launch multiple VM instances. The first one boots up within seconds but the
second takes noticeable time. If I instantiate the third instance when two
instances are already running, it may take 30 minutes to come up. Moreover,
the CPU idle % for a given instance keeps decreasing as number of running
instances increase.

I am suspecting that this behavior is because be lack of bounding of vCPUs
with physical CPUs.

Because of single node installation, the compute node itself becomes
virtualized and run my instances within it. How do I bound my vCPU all the
way to the physical host? I did not see any documentation regarding this
for Kilo release and there is no mention of bounding CPU for the
virtualized compute node on single node installation.

This is the specification of the host:

Architecture:          x86_64

CPU op-mode(s):        32-bit, 64-bita

Byte Order:            Little Endian

CPU(s):                36

On-line CPU(s) list:   0-35

Thread(s) per core:    2

Core(s) per socket:    18

Socket(s):             1

NUMA node(s):          1

Vendor ID:             GenuineIntel

CPU family:            6

Model:                 63

Stepping:              2

CPU MHz:               1200.000

BogoMIPS:              4599.94

Virtualization:        VT-x

L1d cache:             32K

L1i cache:             32K

L2 cache:              256K

L3 cache:              46080K

NUMA node0 CPU(s):     0-35


Spec. for the compute node:

Architecture:          x86_64

CPU op-mode(s):        32-bit, 64-bit

Byte Order:            Little Endian

CPU(s):                26

On-line CPU(s) list:   0-25

Thread(s) per core:    1

Core(s) per socket:    1

Socket(s):             26

NUMA node(s):          1

Vendor ID:             GenuineIntel

CPU family:            6

Model:                 6

Stepping:              3

CPU MHz:               2299.996

BogoMIPS:              4599.99

Virtualization:        VT-x

Hypervisor vendor:     KVM

Virtualization type:   full

L1d cache:             32K

L1i cache:             32K

L2 cache:              4096K

NUMA node0 CPU(s):     0-25


Spec for my instance:

Architecture:          x86_64

CPU op-mode(s):        32-bit, 64-bit

Byte Order:            Little Endian

CPU(s):                4

On-line CPU(s) list:   0-3

Thread(s) per core:    1

Core(s) per socket:    1

Socket(s):             4

NUMA node(s):          1

Vendor ID:             GenuineIntel

CPU family:            15

Model:                 6

Stepping:              1

CPU MHz:               2299.994

BogoMIPS:              4599.98

Virtualization:        VT-x

Hypervisor vendor:     KVM

Virtualization type:   full

L1d cache:             32K

L1i cache:             32K

L2 cache:              4096K
NUMA node0 CPU(s):     0-3

Thanks
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20161218/c3191ce4/attachment.html>