All containers become intermittently unreachable

Docker Desktop
6

I just run some tests with Oaakla Speedtest to verify the hypothesis.
I have a 600/300 fiber line and used WLAN during the tests.

Linux Container on Docker Desktop with WSL2 backend:

docker run -it --rm gists/speedtest-cli speedtest --server-id=31469

   Speedtest by Ookla

      Server: Deutsche Telekom - Hamburg (id: 31469)
         ISP: Deutsche Telekom AG
Idle Latency:     4.78 ms   (jitter: 3.75ms, low: 4.08ms, high: 18.06ms)
    Download:   418.28 Mbps (data used: 486.0 MB)
                 15.58 ms   (jitter: 13.29ms, low: 3.48ms, high: 52.11ms)
      Upload:   272.83 Mbps (data used: 461.9 MB)
                 20.92 ms   (jitter: 14.73ms, low: 3.06ms, high: 239.08ms)
 Packet Loss:     0.0%
  Result URL: https://www.speedtest.net/result/c/2e67ef5c-e677-4b9c-a3e2-a58d828124df

Windows host:

d:\tmp>speedtest.exe --server-id=31469


   Speedtest by Ookla

      Server: Deutsche Telekom - Hamburg (id: 31469)
         ISP: Deutsche Telekom AG
Idle Latency:     3.32 ms   (jitter: 1.05ms, low: 3.13ms, high: 6.58ms)
    Download:   635.35 Mbps (data used: 558.2 MB)
                 26.02 ms   (jitter: 10.06ms, low: 6.24ms, high: 63.47ms)
      Upload:   281.96 Mbps (data used: 312.8 MB)
                  6.29 ms   (jitter: 6.90ms, low: 2.67ms, high: 55.94ms)
 Packet Loss:     0.0%
  Result URL: https://www.speedtest.net/result/c/37f80f9a-cd29-4581-9e2d-695834e71d9e```

WSL2 distro:

me@host ~$ ./speedtest  --server-id=31469

   Speedtest by Ookla

      Server: Deutsche Telekom - Hamburg (id: 31469)
         ISP: Deutsche Telekom AG
Idle Latency:     3.00 ms   (jitter: 0.89ms, low: 2.72ms, high: 4.59ms)
    Download:   629.47 Mbps (data used: 519.4 MB)
                 29.51 ms   (jitter: 14.64ms, low: 8.60ms, high: 142.58ms)
      Upload:   276.24 Mbps (data used: 288.3 MB)
                  9.05 ms   (jitter: 8.26ms, low: 2.72ms, high: 72.50ms)
 Packet Loss:     0.0%
  Result URL: https://www.speedtest.net/result/c/b8780bc8-a95f-4fb4-9592-94d531d6d963

I repeated each test a couple of times, and had similar results in each environment. The results between on Windows and the WSL2 distribution are more or less on par (I usee networkMode=mirrored for WSL2).

The Linux container had a performance loss of 1/3 comared to the host/wsl2 disto when it comes to incoming traffic.

I am not sure how a GPU would be relevant for network performance. I can see how a container with greedy cpu consumption might starve other containers, or drive the system load in hights that make the WSL system vm irresponsive.

If you should give a new try, I would be currious how the output of top looks like inside the docker-desktop distro, and it’s system distro:

wsl -d docker-desktop top
wsl -d docker-desktop --system top

Anyhow, I am glad you found a solution that works for you.