arm64 robustness test failure

[serathius]

Which Github Action / Prow Jobs are flaking?

Robustness nightly on arm

Which tests are flaking?

TestRobustnessExploratory/Etcd/HighTraffic/ClusterOfSize3 x2
TestRobustnessExploratory/Kubernetes/LowTraffic/ClusterOfSize3
TestRobustnessExploratory/Etcd/LowTraffic/ClusterOfSize3

• Timeouts

Github Action / Prow Job link

https://github.com/etcd-io/etcd/actions/runs/8153962092/job/22286380964

Reason for failure (if possible)

7/18 flake ratio, all on arm64.

In most cases logs imply too low qps, which might be sign of lower performance, or issue with recovering from failure injection.

I have seen previously failure cases with logs reporting broken snapshots sent between members. So there might be an underlying correctness issue on arm64.

Anything else we need to know?

If arm64 tests are not stabilized, I will consider disabling it due to lack of support.

[ah8ad3]

If it's ok i can take a look at them. Maybe i can find the issue.

[jmhbnz]

Hey @ah8ad3 - Thanks for your interest, I will take this one. I believe it's a performance related challenge with our arm64 CI infrastructure.

Please feel free to look into any failures on arm64 that don't relate to qps to low, these will be more interesting flakes to explore.

/assign

[ah8ad3]

Thanks for the info @jmhbnz . OK i'll do that. GL on this one.