Currently operating 3 Jetson TX1s on an isolated network. When connected to WiFi, TX1 communications are completely unreliable: latency anywhere between 50 ms and 5000 ms. On Ethernet, latency is a smooth, consistent 2.5 ms.
Problems:
Cannot start or use ad hoc network
Cannot use external router WiFi to get reliable latency
Currently, the setup is 3 TX1s connected via Ethernet to a router. The ideal setup would not involve the router at all, but use the on-board wireless adapters with an ad hoc network.
I’ve tested the wireless devices on all 3 Jetsons, and it does not seem to be a hardware problem. All Jetsons are running at maximum performance, as well.
As what I understood, ideally you want 3 TX1 can communicate with each other.
I am still working on init ad-hoc mode and the performance issue. If you are urgent, please try wifi-ap mode first. This would help you build an isolated network but still different from ad-hoc.
Yes, that’s right. Currently, there is a problem using wifi on any of the TX1s. Namely, when they are connected to a wireless network via wifi adapter, latency is very poor (~3000 ms). We’re hoping to address this issue, as well.
The best results I’ve observed give good latency initially (~50 ms), but quickly devolve. I get a few solid packets through, then back to ~1000-5000 ms latency.
Tested on standard channels (1, 6, 11), and nonstandard channels (2, 3, 4, 8, 10).
I used the aforementioned commands, and set up an ad hoc network, but could not get any TX1 to connect to the TX1 hosting the network. It would hang for quite some time trying to resolve the connection, and then tell me it couldn’t connect.
I set up the ad hoc network by doing the following:
Clicked WiFi symbol in upper-right corner
Clicked "Create New Wi-Fi Network"
Gave it an SSID, and a password
To test if latency improved, I connected the TX1s to a router, and pinged them from one of the TX1s. The results seemed better, but not reliable. I would get a few instances of latency times on the order of 50 ms, but then it would shoot up to 1000 ms every third or fourth message.
So I’ve got one TX1 set up as an access point (hotspot in Ubuntu 16.04), and the ping latency tends to be between 15 and 30 ms. Occasionally, latency jumps to 100ish ms.
Is this considered standard operating performance?
P.S. I’ve set the TX1s to maximum performance, too.