FYI,

I just pushed a patch to change the units of the dpdk "poll-sleep" parameter 
from milliseconds to microseconds. Set as shown below, my vpp home gateway runs 
at a very low load-average:

dbarach@vppgate:~$ uptime
10:34:00 up 16 days, 23:41, 1 user, load average: 0.07, 0.25, 0.62

No issues keeping up with a ~ 100mbit downstream link, no obvious VoIP issues. 
Speedtest.net managed to push the vector size to 3, vs 1.7 when polling 
aggressively.

@@ -96,4 +102,7 @@ dpdk {
+
+        ## Sleep for 300 us between polls
+        poll-sleep 300
}

Related patch to change the configuration parameter units: 
https://gerrit.fd.io/r/#/c/5674/

Thanks... Dave

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