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trace_repro

Nix installation

Install according to: https://nixos.org/download

# install nix - package manager
sh <(curl -L https://nixos.org/nix/install) --daemon

# enable nix flakes
mkdir -p "$HOME/.config/nix"
echo 'experimental-features = nix-command flakes' > "$HOME/.config/nix/nix.conf"

Running a VM

QEMU_NET_OPTS="hostfwd=tcp::2221-:22" nix run .#nixosConfigurations.test.config.system.build.vm

SSH into the machine

ssh -oUserKnownHostsFile=/dev/null -oStrictHostKeyChecking=no -i private_key.pem root@localhost -p 2221

Bug(?) reproduce steps

  1. Launch a vm
  2. Open two ssh sessions (A and B)
  3. In A run: bpftrace $(which gethostlatency.bt) -p $$
  4. In B run: curl https://google.com

Expected behavior: terminal A shows no entries Actual behavior: terminal A contains logged queries

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