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Thanks Sudipto for pointing out the tool; another light weight tool I am thinking is 'ethtool', in order to collect basic NIC info, including "speed". 

Rao Adnan Khan
AT&T Integrated Cloud (AIC) Development | SE
Software Development & Engineering (SD&E)
Emai: rk221s at att.com
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-----Original Message-----
From: Sudipto Biswas [mailto:sbiswas7 at linux.vnet.ibm.com] 
Sent: Monday, June 20, 2016 12:12 AM
To: openstack-dev at lists.openstack.org; sbiswas7 at in.ibm.com
Subject: Re: [openstack-dev] Recommended ways to find compute node's bandwidth (physical NIC)

Thanks Jay for pointing this out.

Adnan,

Yeah - you could use PcP - if that module gets integrated with Nova.

For your benefit, here are some of the metrics that PcP can provide 
related to the physical NIC:

pminfo | grep network.interface  <== Listing the available metrics.
network.interface.collisions
network.interface.mtu
network.interface.speed
network.interface.baudrate
network.interface.duplex
network.interface.up
network.interface.running
network.interface.inet_addr
network.interface.ipv6_addr
network.interface.ipv6_scope
network.interface.hw_addr
network.interface.in.bytes
network.interface.in.packets
network.interface.in.errors
network.interface.in.drops
network.interface.in.fifo
network.interface.in.frame
network.interface.in.compressed
network.interface.in.mcasts
network.interface.out.bytes
network.interface.out.packets
network.interface.out.errors
network.interface.out.drops
network.interface.out.fifo
network.interface.out.carrier
network.interface.out.compressed
network.interface.total.bytes
network.interface.total.packets
network.interface.total.errors
network.interface.total.drops
network.interface.total.mcasts


# pmval network.interface.out.bytes <== A sample metric value.
metric:    network.interface.out.bytes
host:      <my_host>
semantics: cumulative counter (converting to rate)
units:     byte (converting to byte / sec)
samples:   all
             wlp3s0                    lo virbr0                   
wc0                   em1 virbr0-nic
                0.0                   0.0 0.0                   
0.0                   0.0 0.0
               85.96                  0.0 0.0                   
0.0                   0.0 0.0
                0.0                   0.0 0.0                   
0.0                   0.0 0.0
                0.0                   0.0 0.0                   
0.0                   0.0 0.0
             1588.                 4031. 0.0                 
787.6                   0.0 0.0
              492.7                   0.0 0.0                 
155.9                   0.0 0.0


As you might observe, there's a plenty for you to draw inferences.

Hope this helps!

Cheers,
Sudipto

On Monday 20 June 2016 09:07 AM, Jay Pipes wrote:
> On 06/16/2016 04:16 PM, KHAN, RAO ADNAN wrote:
>> I am writing a nova filter that will check for the compute node (max,
>> avg) bandwidth, before instantiating an instance. What are some of the
>> recommended tools that can provide this info in real time? Does any
>> openstack component hold this info already?
>
> You may want to chat with Sudipta Biswas (cc'd). The PCP module (yes, 
> it's an awkward name for a performance profiling module...) does some 
> of what you're looking for and Sudipta has been attempting to 
> integrate it with Nova for this express purpose.
>
> Best,
> -jay
>
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