Hi Ole,

If that is correct, why I am not able to see the stats? ( I am waiting for 60 
sec for getting the stats)


Regards,
Neha

From: Ole Troan [mailto:[email protected]]
Sent: Monday, July 9, 2018 12:03 PM
To: Vadnere, Neha R <[email protected]>
Cc: [email protected]
Subject: Re: [vpp-dev] VPP python binding for getting interface stats in VPP 
18.07

Neha,

On 9 Jul 2018, at 07:26, Neha 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

I want to get stats from vpp python api. I am following instructions as 
specified in https://wiki.fd.io/view/VPP/Python_API. I am able to get other 
info as interface details etc. which uses dump and req/rep messages.

vpp_papi.register_event_callback(papi_event_handler) does not call the callback 
function specified, when want_stats is called.


In https://www.mail-archive.com/[email protected]/msg03819.html it is 
mentioned
1.) client -> want_stats -> vpp
2.) vpp -> want_stats_reply -> client (confirms subscription)
3.) vpp -> <various stats messages> -> client (when timer fires)

in step 3.), client needs to read the shared memory queue in the
vpp->client direction (or use the appropriate XXX_read() function). Note
that stats take a few seconds to arrive (the test programs require
10-15 seconds of runtime to get some stats).

But not sure where these read_from_shared_mem functions are. I assumed that 
want_stats will send the stats when enabled.
Please guide on this.

That’s correct, the Python language binding takes care of reading from shared 
memory.
Sounds like you have done everything right.

Cheers
Ole




Regards,
Neha

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