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GOFIRST-Robotics / NASA-RMC-2020-NorthstarRobotics

The NASA RMC 2020 repository for Northstar Robotics, a segment of University of Minnesota Robotics
https://docs.google.com/presentation/d/1eXhP5dbxtgWJBE492b78TFrnQFL9yoPsJFO4HszJn60/edit?usp=sharing
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High latency between MC laptop and Jetson #18

Closed juliaschatz closed 4 years ago

juliaschatz commented 4 years ago 

PING 192.168.1.19 (192.168.1.19) 56(84) bytes of data.
64 bytes from 192.168.1.19: icmp_seq=1 ttl=64 time=325 ms
64 bytes from 192.168.1.19: icmp_seq=2 ttl=64 time=349 ms
64 bytes from 192.168.1.19: icmp_seq=3 ttl=64 time=298 ms
64 bytes from 192.168.1.19: icmp_seq=4 ttl=64 time=396 ms
64 bytes from 192.168.1.19: icmp_seq=5 ttl=64 time=5.61 ms
64 bytes from 192.168.1.19: icmp_seq=6 ttl=64 time=33.2 ms
64 bytes from 192.168.1.19: icmp_seq=7 ttl=64 time=6.77 ms
64 bytes from 192.168.1.19: icmp_seq=8 ttl=64 time=156 ms
64 bytes from 192.168.1.19: icmp_seq=9 ttl=64 time=3.69 ms
64 bytes from 192.168.1.19: icmp_seq=10 ttl=64 time=6.08 ms
64 bytes from 192.168.1.19: icmp_seq=11 ttl=64 time=2.89 ms
64 bytes from 192.168.1.19: icmp_seq=12 ttl=64 time=373 ms
64 bytes from 192.168.1.19: icmp_seq=13 ttl=64 time=396 ms
64 bytes from 192.168.1.19: icmp_seq=14 ttl=64 time=287 ms
64 bytes from 192.168.1.19: icmp_seq=15 ttl=64 time=341 ms
64 bytes from 192.168.1.19: icmp_seq=16 ttl=64 time=364 ms
64 bytes from 192.168.1.19: icmp_seq=17 ttl=64 time=379 ms
64 bytes from 192.168.1.19: icmp_seq=18 ttl=64 time=412 ms
64 bytes from 192.168.1.19: icmp_seq=19 ttl=64 time=171 ms
64 bytes from 192.168.1.19: icmp_seq=20 ttl=64 time=452 ms
64 bytes from 192.168.1.19: icmp_seq=21 ttl=64 time=571 ms
64 bytes from 192.168.1.19: icmp_seq=22 ttl=64 time=310 ms
64 bytes from 192.168.1.19: icmp_seq=23 ttl=64 time=325 ms
64 bytes from 192.168.1.19: icmp_seq=24 ttl=64 time=656 ms
64 bytes from 192.168.1.19: icmp_seq=25 ttl=64 time=578 ms
64 bytes from 192.168.1.19: icmp_seq=26 ttl=64 time=601 ms
64 bytes from 192.168.1.19: icmp_seq=27 ttl=64 time=318 ms
64 bytes from 192.168.1.19: icmp_seq=28 ttl=64 time=343 ms
64 bytes from 192.168.1.19: icmp_seq=29 ttl=64 time=373 ms
64 bytes from 192.168.1.19: icmp_seq=30 ttl=64 time=388 ms```
juliaschatz commented 4 years ago

Similar effects happening on both mine and Molly's computers. Average 300-400 ms latency with spikes up to 1000-2000 and valleys down to 3-4 ms

juliaschatz commented 4 years ago

Occurs when MC laptop on wifi and wired.

juliaschatz commented 4 years ago

Turns out we just needed to turn off the Jetson's wifi power saving. sudo iw dev wlan0 set power_save off

juliaschatz commented 4 years ago

I'll create a utility script that does this

JWCS commented 4 years ago

I was confident it didn't do this in May...?