dpino
commented
7 years ago A similar bug was reported here https://github.com/snabbco/snabb/issues/928. Can you provide a link to the pcap file you're using as well as the command line you're using to send the packets to p2p2 interface? It makes it easier to reproduce the bug.
So I have a very simple app which reads from a RawSocket and sends the packets to a Sink:
module(..., package.seeall) local raw = require("apps.socket.raw") local Sink=require("apps.basic.basic_apps").Sink
function run (parameters) if not (#parameters == 1) then print("Usage: tester")
main.exit(1)
end
local interface = parameters[1]
local c = config.new()
config.app(c, "source", raw.RawSocket, interface)
config.app(c, "output", Sink)
config.link(c, "source.tx -> output.rx")
engine.configure(c)
local fn = function ()
print("Main Report:")
engine.report_links()
end
local t = timer.new("report", fn, 1e9*60, 'repeating')
timer.activate(t)
engine.configure(c)
engine.main()
end
If I replay a pcap containing approx 1 million packets to that interface using a version of snabb from December 2015 I get the output:
ampadmin@london:~/snabbswitch-master$ sudo src/snabb tester p2p2 Main Report: link report: 1,057,440 sent on source.tx -> output.rx (loss rate: 0%)
If I run the same test on a current version of snabb I get much less packets through ampadmin@london:~/snabb-2017.06$ sudo src/snabb tester p2p2 Main Report: link report: 523,111 sent on source.tx -> output.rx (loss rate: 0%)
Almost half the amount. Is there something I've missed in setup with the later versions?
I'm running on Ubuntu 16.04.
Thanks, Andrew