Claude
9cd8d0a6ee
The qlog confirmed the writer emits 1 STREAM frame per packet on the
live wire, while MultiplexingCoalescingTest + MultiplexingAioquicTpsTest
both show ~9 streams per packet under synchronous drain. So the bug is
in the live driver flow — concurrent send loop + parser feed +
real-socket interleaving — and not in buildApplicationPacket itself.
To localize: add an opt-in trace at the END of buildApplicationPacket
that dumps per-drain state when QUIC_INTEROP_DEBUG=1:
[writer.app] frames=N stream_frames=K streamsView=M active=A
packetBudget_remaining=R connBudget_initial=C
- frames vs stream_frames tells us if non-stream frames (ACK,
MAX_DATA, MAX_STREAM_DATA) are bloating the packet
- active vs streamsView tells us if isClosed filter dropped streams
- packetBudget_remaining tells us if we hit the 64-byte break early
- connBudget_initial tells us if conn flow control was zero
Wired three pieces:
1. WriterDebug.kt — a single @Volatile boolean owned by commonMain,
`writerDebugEnabled`. Off by default.
2. InteropClient.main flips it to true if QUIC_INTEROP_DEBUG=1 is set
in the env.
3. Dockerfile + Makefile accept --build-arg DEBUG=1 (or `make build
DEBUG=1`) to bake the env var into the image.
Usage:
cd quic/interop
make build DEBUG=1
cd ../..
./quic/interop/run-matrix.sh -s aioquic -t multiplexing
cat ../quic-interop-runner/logs/run-*/aioquic_amethyst/multiplexing/output.txt | grep '^\[writer'
When off, cost is one volatile read in the writer hot path — negligible.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
24 lines
922 B
Docker
24 lines
922 B
Docker
# quic-interop-runner endpoint image for :quic.
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#
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# Build (from repo root):
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# ./gradlew :quic-interop:installDist
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# docker build -t amethyst-quic-interop -f quic/interop/Dockerfile .
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#
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# Or run `make build` inside quic/interop/.
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FROM martenseemann/quic-network-simulator-endpoint:latest
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends openjdk-21-jre-headless \
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&& rm -rf /var/lib/apt/lists/*
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COPY quic/interop/build/install/quic-interop /opt/quic-interop
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COPY quic/interop/run_endpoint.sh /run_endpoint.sh
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RUN chmod +x /run_endpoint.sh /opt/quic-interop/bin/quic-interop
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# Build-time toggle for verbose tracing. Pass --build-arg DEBUG=1 (or
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# `make build DEBUG=1` via the Makefile) to bake QUIC_INTEROP_DEBUG into
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# the image so the InteropClient + writer emit per-drain stats to stderr.
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# Off by default — production matrix runs stay quiet.
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ARG DEBUG=0
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ENV QUIC_INTEROP_DEBUG=${DEBUG}
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