request: bandwidth consumption

[myrinx]

Hi,

Locust is great for testing, it would be even more awesome if there is a way (graphically) to see what the consumed bandwidth (per sec) is.

Is there a way to implement this quickly? As the number of requests per second and the content size is known, i assume the bandwidth is also traceable? This especially is convenient when master-slave configurations are used.

Thanks!

[cgoldberg]

using reqs/sec and content size to calculate bandwidth would not include overhead from the headers at several layers of network transfer, so it won't be a real accurate measure of bandwidth used. It's also not a trivial change :)
I think this type of metric is better handled by measuring with network monitoring tools.

[myrinx]

It would be an awesome add-on though. It would be great to have a methode inside locust to do this, otherwise you'd have to make another tool that traces bandwidth used on a nic. I'll take a look, maybe I can find something trivial like a library which does it. Would be easy to include into locusts then. Op 23 feb. 2017 5:11 p.m. schreef "Corey Goldberg" <[email protected]

…

: using reqs/sec and content size to calculate bandwidth would not include overhead from the headers at several layers of network transfer, so it won't be a real accurate measure of bandwidth used. It's also not a trivial change :) I think this type of metric is better handled by measuring with network monitoring tools. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#551 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGA5znhLuhyoxTFFYeMb6yMDOpM-jSzaks5rfa-fgaJpZM4MJ8oR> .

[cgoldberg]

otherwise you'd have to make another
tool that traces bandwidth used on a nic.

but lots of such tools exist.

maybe I can find something trivial like a library which does it

check out psutil: https://github.com/giampaolo/psutil

It's a popular library for gathering system and process stats. It's also cross-platform, which is probably the most difficult part of implementing this to intregrate with Locust. You would need to retrieve network i/o stats for a given nic (or all nics) at specified intervals, and then do calculations to get bits/sec for each interval (and probably aggregate stats for the entire run).

You can get at the data easily with the net_io_counters() function from psutil: https://pythonhosted.org/psutil/#psutil.net_io_counters

There is an example included that has most of it done for you:
https://github.com/giampaolo/psutil/blob/master/scripts/nettop.py

just remember that these stats are system-wide, not per process. (but maybe that's what you are after anyways).

hope that helps..

[myrinx]

Very much, thanks! Op 23 feb. 2017 8:57 p.m. schreef "Corey Goldberg" <[email protected]

…

: otherwise you'd have to make another tool that traces bandwidth used on a nic. but lots of such tools exist. maybe I can find something trivial like a library which does it check out psutil: https://github.com/giampaolo/psutil It's a popular library for gathering system and process stats. It's also cross-platform, which is probably the most difficult part of implementing this to intregrate with Locust. You would need to retrieve network i/o stats for a given nic (or all nics) at specified intervals, and then do calculations to get bits/sec for each interval (and probably aggregate stats for the entire run). You can get at the data easily with the net_io_counters() function from psutil: https://pythonhosted.org/psutil/#psutil.net_io_counters There is an example included that has most of it done for you: https://github.com/giampaolo/psutil/blob/master/scripts/nettop.py just remember that these stats are system-wide, not per process. (but maybe that's what you are after anyways). hope that helps.. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#551 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGA5zkY1oRcvdsnlnF8cOWmBHABFbAI1ks5rfeS6gaJpZM4MJ8oR> .