diff --git a/README.md b/README.md
index 0e6efcf..821b82c 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # sskj — 多平台大模型推理性能基准测试项目
 
+**更新（2026-08-18 12:24:19 CST）**：新增 Kimi-K3 / 601-604 / SGLang TP32×EP32 的真实 Prefill MoE backend 验收实验；固定比较 Marlin 与 FlashInfer MXFP4 在 16K→1、C=8/16、Chunk=8K/16K 下的 TTFT、E2E 与 Input TPS，并提供四节点一致候选镜像构建、原始证据和自动汇总，详见 `experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/README.md`。
+
 **更新（2026-08-17 11:56:47 CST）**：完成 Kimi-K3 / RTX PRO 6000D / SGLang FlashInfer MXFP4 MoE Phase 2 correctness harness；SwiGLU 控制矩阵 8/8 通过，覆盖 edge routing、EP global ID、NaN/Inf、确定性、CUDA Graph 和 Kimi 真尺寸，SiTU 目标矩阵 8/8 稳定复现同一 C++ 缺口，详见 `experiments/pro6000/kimi3_pro6000_sglang_sm120_flashinfer_mxfp4/README.md`。
 
 > 历史更新见 `git log`。项目目的与工作流见下方。
@@ -47,6 +49,7 @@
 | `experiments/pro6000/dsv4_pro6000_vllm_tp_dp_matrix/` | RTX 6000D + vLLM |
 | `experiments/pro6000/dsv4_pro6000_sglang_tp_dp_matrix/` | RTX 6000D + SGLang |
 | `experiments/pro6000/kimi3_pro6000_sglang_tp32ep32/` | RTX 6000D + SGLang，Kimi-K3（TP32×EP32，部署手册见 docs/KIMI_K3_DEPLOY.md） |
+| `experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/` | RTX 6000D + SGLang，Kimi-K3 真实 Prefill 的 Marlin/FlashInfer MXFP4 与 Chunk 8K/16K 对照 |
 | `experiments/pro6000/kimi3_pro6000_pd_rdma/` | RTX 6000D + SGLang，Kimi-K3 PD 分离（MoonCake RDMA，8 节点，见 deploy_pd.sh + docs/KIMI_K3_DEPLOY.md 附录 B） |
 
 每个目录内：`run_bench.sh` 跑固定并发矩阵；`run_adaptive_concurrency.sh` 从 C=1 指数倍增搜饱和点；`run_adaptive_concurrency_add16.sh` 从 C=16 线性 +16 步进、带 TTFT SLO 停止与回退（当前主力用法，见 `experiments/ADAPTIVE_CONCURRENCY_USAGE.md`）。
diff --git a/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/Dockerfile b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/Dockerfile
new file mode 100644
index 0000000..17fbeb2
--- /dev/null
+++ b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/Dockerfile
@@ -0,0 +1,34 @@
+ARG BASE_IMAGE=lmsysorg/sglang:kimi-k3-fiv617situ-warm
+FROM ${BASE_IMAGE}
+
+ENV FLASHINFER_DISABLE_JIT=1 \
+    FLASHINFER_DISABLE_VERSION_CHECK=1 \
+    PYTHONUNBUFFERED=1
+
+RUN rm -rf \
+      /usr/local/lib/python3.12/dist-packages/flashinfer \
+      /usr/local/lib/python3.12/dist-packages/flashinfer_python-*.dist-info
+
+COPY flashinfer_python-0.6.18-py3-none-any.whl /tmp/flashinfer_python.whl
+RUN python3 -m pip install --no-deps --force-reinstall /tmp/flashinfer_python.whl && \
+    rm -f /tmp/flashinfer_python.whl
+
+# The wheel contains Python/C++ sources. These three libraries are the exact
+# SM120 AOT artifacts that passed the Phase 3/4 correctness gate.
+COPY aot/ /usr/local/lib/python3.12/dist-packages/flashinfer/data/aot/
+
+# Use the complete tested SGLang Python package, not a pair of loose runtime
+# mounts. This preserves API compatibility between the two changed modules and
+# their surrounding Kimi/MoE integration.
+COPY sglang/ /sgl-workspace/sglang/python/sglang/
+
+# Existing Kimi image compatibility fix: tcgen05 attention-residual is valid on
+# SM100/SM103, not consumer Blackwell SM120. Bake the fallback into the image.
+RUN python3 -c "from pathlib import Path; p=Path('/sgl-workspace/sglang/python/sglang/srt/layers/attn_residual.py'); s=p.read_text(); old='        _FAST_SUPPORTED = major >= 10'; new='        _FAST_SUPPORTED = major in (10, 11)'; assert old in s; p.write_text(s.replace(old,new))" && \
+    python3 -m compileall -q /sgl-workspace/sglang/python/sglang && \
+    python3 -c "from flashinfer.fused_moe import core; assert core.CUTLASS_FUSED_MOE_SUPPORTS_SITU is True"
+
+LABEL ai.meta-stone.purpose="Kimi-K3 SM120 FlashInfer MXFP4 Phase 5 acceptance" \
+      ai.meta-stone.sglang.patch="fb929bb" \
+      ai.meta-stone.flashinfer.patch="7d1a4ee"
+
diff --git a/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/README.md b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/README.md
new file mode 100644
index 0000000..cd5e012
--- /dev/null
+++ b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/README.md
@@ -0,0 +1,70 @@
+# Kimi-K3 / Pro6000D / SGLang TP32 EP32 MoE Backend Prefill
+
+This experiment is the real-serving acceptance gate for Kimi-K3 FlashInfer
+MXFP4 MoE on NVIDIA SM120. It does not modify the existing baseline experiment.
+
+## Fixed matrix
+
+| Dimension | Values |
+|---|---|
+| Nodes | 601-604, 8 GPUs per node |
+| Parallelism | TP32, EP32, DP1 |
+| MoE runner | `marlin`, `flashinfer_mxfp4` |
+| Input / output | 16K / 1 token |
+| Concurrency | 8, 16 |
+| Chunked prefill | 8K, 16K |
+| Requests | 40 per repeat |
+| Repeats | 3 |
+
+The eight configurations are identical except for MoE runner and chunk size.
+Radix cache is disabled. `OSL=1` makes TTFT, E2E latency and input TPS the
+primary metrics; TPOT is not meaningful for this matrix.
+
+## Unique entrypoint
+
+Run on 601 only. The sudo password is supplied at runtime and is never written
+to Git or result files.
+
+```bash
+cd /data/hzy/sskj/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill
+
+read -rsp 'sudo password: ' SUDO_PASSWORD; echo
+export SUDO_PASSWORD
+export RUN_ID=kimi3-moe-prefill-$(date +%Y%m%d-%H%M%S)
+
+bash run_moe_backend_prefill.sh build-image
+bash run_moe_backend_prefill.sh run
+```
+
+For an unattended run, use the same entrypoint under tmux:
+
+```bash
+umask 077
+printf '%s\n' "$SUDO_PASSWORD" > /tmp/kimi3-phase5-sudo
+unset SUDO_PASSWORD
+
+tmux new-session -d -s kimi3-moe-prefill \
+  "cd /data/hzy/sskj/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill && \
+   SUDO_PASSWORD_FILE=/tmp/kimi3-phase5-sudo RUN_ID=\"${RUN_ID}\" \
+   bash run_moe_backend_prefill.sh all 2>&1 | tee /data/hzy/${RUN_ID}.log"
+```
+
+Delete `/tmp/kimi3-phase5-sudo` after the run. The file is mode `0600` and is
+never copied to result directories.
+
+## Outputs
+
+```text
+results/<RUN_ID>/
+  build/            per-node image build and smoke evidence
+  service/          exact docker commands and all four server logs
+  raw/              one benchmark JSONL per repeat
+  bench/            human-readable benchmark logs
+  gpu/              per-node GPU snapshots
+  results.csv       flat repeat-level metrics
+  summary.json      median metrics and FlashInfer-vs-Marlin deltas
+  orchestrator.log  lifecycle and progress
+```
+
+The run aborts on a failed service start, any failed request, a missing result,
+or an image capability smoke failure. Containers are removed on exit.
diff --git a/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/config.env b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/config.env
new file mode 100644
index 0000000..7f067cf
--- /dev/null
+++ b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/config.env
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Kimi-K3 real-serving MoE backend acceptance on 601-604.
+
+EXPERIMENT="kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill"
+MODEL_PATH="${MODEL_PATH:-/data/hf_models/Kimi-K3}"
+SERVED_MODEL_NAME="${SERVED_MODEL_NAME:-kimi-k3}"
+PORT="${PORT:-30000}"
+
+HEAD_HOST="${HEAD_HOST:-174.1.60.1}"
+NODE_SSH_USER="${NODE_SSH_USER:-user}"
+NODE_HOSTS=(174.1.60.1 174.1.60.2 174.1.60.3 174.1.60.4)
+DIST_PORT="${DIST_PORT:-20000}"
+
+BASE_IMAGE="${BASE_IMAGE:-lmsysorg/sglang:kimi-k3-fiv617situ-warm}"
+CANDIDATE_IMAGE="${CANDIDATE_IMAGE:-local/sglang:kimi-k3-sm120-flashinfer-mxfp4-phase5}"
+FLASHINFER_TARGET="${FLASHINFER_TARGET:-/tmp/hzy-fi-situ-phase3-v3}"
+FLASHINFER_WHEEL="${FLASHINFER_WHEEL:-/data/hzy/artifacts/flashinfer-kimi-sm120-situ-phase3-v3/flashinfer_python-0.6.18-py3-none-any.whl}"
+SGLANG_SOURCE="${SGLANG_SOURCE:-/data/hzy/src/sglang-kimi-sm120/python/sglang}"
+
+DATASET_PATH="${DATASET_PATH:-${ROOT_DIR}/dataset/ShareGPT_V3_unfiltered_cleaned_split.json}"
+BENCH_MODULE="${BENCH_MODULE:-sglang.benchmark.serving}"
+RESULT_BASE="${RESULT_BASE:-${SCRIPT_DIR}/results}"
+
+INPUT_LEN="${INPUT_LEN:-16384}"
+OUTPUT_LEN="${OUTPUT_LEN:-1}"
+NUM_PROMPTS="${NUM_PROMPTS:-40}"
+REPEATS="${REPEATS:-3}"
+WARMUP_REQUESTS="${WARMUP_REQUESTS:-2}"
+HEALTH_WAIT_S="${HEALTH_WAIT_S:-2400}"
+
+BACKENDS=(marlin flashinfer_mxfp4)
+CHUNKED_PREFILL_SIZES=(8192 16384)
+CONCURRENCIES=(8 16)
+
diff --git a/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/run_moe_backend_prefill.sh b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/run_moe_backend_prefill.sh
new file mode 100755
index 0000000..e22792f
--- /dev/null
+++ b/experiments/pro6000/kimi3_pro6000_sglang_tp32ep32_moe_backend_prefill/run_moe_backend_prefill.sh
@@ -0,0 +1,429 @@
+#!/usr/bin/env bash
+# Compare Marlin and FlashInfer MXFP4 on real four-node Kimi-K3 prefill.
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=/dev/null
+source "${SCRIPT_DIR}/../../../scripts/common/lib.sh"
+# shellcheck source=/dev/null
+source "${SCRIPT_DIR}/../../../scripts/common/platform.sh"
+# shellcheck source=/dev/null
+source "${SCRIPT_DIR}/config.env"
+
+ACTION="${1:-all}"
+RUN_ID="${RUN_ID:-kimi3-moe-prefill-$(date '+%Y%m%d-%H%M%S')}"
+RESULT_ROOT="${RESULT_BASE}/${RUN_ID}"
+BUILD_CONTEXT="/tmp/${EXPERIMENT}_image_context"
+CONTAINER_PREFIX="${EXPERIMENT}"
+SSH_OPTS=(-o BatchMode=yes -o StrictHostKeyChecking=no -o ConnectTimeout=10)
+
+mkdir -p "${RESULT_ROOT}"/{build,service,raw,bench,gpu}
+log_init "${RESULT_ROOT}/orchestrator.log"
+
+usage() {
+  cat <<'EOF'
+Usage: SUDO_PASSWORD=... bash run_moe_backend_prefill.sh ACTION
+
+Actions:
+  build-image  Build the same candidate image on 601-604.
+  run          Run the fixed 8-case matrix with an existing image.
+  all          Build the image, run the matrix, and summarize it (default).
+  summarize    Rebuild CSV summaries from an existing RUN_ID.
+  stop         Remove this experiment's containers from all four nodes.
+EOF
+}
+
+require_password() {
+  if [[ -z "${SUDO_PASSWORD:-}" && -n "${SUDO_PASSWORD_FILE:-}" ]]; then
+    [[ -r "$SUDO_PASSWORD_FILE" ]] || {
+      echo "ERROR: cannot read SUDO_PASSWORD_FILE=$SUDO_PASSWORD_FILE" >&2
+      exit 2
+    }
+    IFS= read -r SUDO_PASSWORD <"$SUDO_PASSWORD_FILE"
+  fi
+  if [[ -z "${SUDO_PASSWORD:-}" ]]; then
+    echo "ERROR: set SUDO_PASSWORD or SUDO_PASSWORD_FILE at runtime" >&2
+    exit 2
+  fi
+}
+
+is_head() {
+  [[ "$1" == "$HEAD_HOST" ]]
+}
+
+run_host() {
+  local host="$1"
+  shift
+  if is_head "$host"; then
+    "$@"
+  else
+    ssh "${SSH_OPTS[@]}" "${NODE_SSH_USER}@${host}" "$@"
+  fi
+}
+
+sudo_host() {
+  local host="$1"
+  shift
+  require_password
+  if is_head "$host"; then
+    printf '%s\n' "$SUDO_PASSWORD" | sudo -S -p '' -- "$@"
+    return
+  fi
+  local remote_cmd
+  printf -v remote_cmd '%q ' "$@"
+  printf '%s\n' "$SUDO_PASSWORD" | \
+    ssh "${SSH_OPTS[@]}" "${NODE_SSH_USER}@${host}" \
+      "sudo -S -p '' -- ${remote_cmd}"
+}
+
+check_inputs() {
+  local path
+  for path in "$MODEL_PATH" "$DATASET_PATH" "$FLASHINFER_TARGET/flashinfer" \
+    "$FLASHINFER_WHEEL" "$SGLANG_SOURCE"; do
+    [[ -e "$path" ]] || { echo "ERROR: required path missing: $path" >&2; exit 2; }
+  done
+  [[ -d "$FLASHINFER_TARGET/flashinfer/data/aot/fused_moe_120" ]] || {
+    echo "ERROR: fused_moe_120 AOT artifact is missing" >&2
+    exit 2
+  }
+}
+
+prepare_build_context() {
+  log "preparing candidate image context at ${BUILD_CONTEXT}"
+  rm -rf "$BUILD_CONTEXT"
+  mkdir -p "$BUILD_CONTEXT/aot" "$BUILD_CONTEXT/sglang"
+  cp "$SCRIPT_DIR/Dockerfile" "$BUILD_CONTEXT/Dockerfile"
+  cp "$FLASHINFER_WHEEL" "$BUILD_CONTEXT/flashinfer_python-0.6.18-py3-none-any.whl"
+  cp -a "$FLASHINFER_TARGET/flashinfer/data/aot/." "$BUILD_CONTEXT/aot/"
+  cp -a "$SGLANG_SOURCE/." "$BUILD_CONTEXT/sglang/"
+  find "$BUILD_CONTEXT" -type d -name __pycache__ -prune -exec rm -rf {} +
+  find "$BUILD_CONTEXT" -type f -name '*.pyc' -delete
+  du -sh "$BUILD_CONTEXT" | tee "$RESULT_ROOT/build/context_size.txt"
+}
+
+stage_context() {
+  local host="$1"
+  if is_head "$host"; then
+    return
+  fi
+  log "staging image context on ${host}"
+  ssh "${SSH_OPTS[@]}" "${NODE_SSH_USER}@${host}" \
+    "rm -rf '$BUILD_CONTEXT' && mkdir -p '$BUILD_CONTEXT'"
+  tar -C "$BUILD_CONTEXT" -cf - . | \
+    ssh "${SSH_OPTS[@]}" "${NODE_SSH_USER}@${host}" \
+      "tar -C '$BUILD_CONTEXT' -xf -"
+}
+
+build_one_node() {
+  local host="$1"
+  local log_path="$RESULT_ROOT/build/${host}.log"
+  log "building ${CANDIDATE_IMAGE} on ${host}"
+  sudo_host "$host" docker build \
+    --build-arg "BASE_IMAGE=${BASE_IMAGE}" \
+    --tag "$CANDIDATE_IMAGE" "$BUILD_CONTEXT" >"$log_path" 2>&1
+  sudo_host "$host" docker image inspect "$CANDIDATE_IMAGE" \
+    --format '{{.Id}} {{.Size}}' >"$RESULT_ROOT/build/${host}.image.txt"
+}
+
+smoke_image() {
+  local host="$1"
+  sudo_host "$host" docker run --rm --gpus device=0 \
+    --entrypoint python3 "$CANDIDATE_IMAGE" -c \
+    "import torch; from flashinfer.fused_moe import core; import sglang; assert torch.cuda.get_device_capability()[0] == 12; assert core.CUTLASS_FUSED_MOE_SUPPORTS_SITU is True; print(sglang.__file__, core.ActivationType.Situ)" \
+    >"$RESULT_ROOT/build/${host}.smoke.txt" 2>&1
+}
+
+build_image_all_nodes() {
+  require_password
+  check_inputs
+  prepare_build_context
+  local host
+  for host in "${NODE_HOSTS[@]}"; do stage_context "$host"; done
+  local -a pids=()
+  for host in "${NODE_HOSTS[@]}"; do
+    build_one_node "$host" &
+    pids+=("$!")
+  done
+  local rc=0 pid
+  for pid in "${pids[@]}"; do wait "$pid" || rc=1; done
+  (( rc == 0 )) || { log "ERROR: candidate image build failed"; return 1; }
+  for host in "${NODE_HOSTS[@]}"; do smoke_image "$host"; done
+  log "candidate image built and smoke-tested on all four nodes"
+}
+
+container_name() {
+  local rank="$1"
+  printf '%s_node%s' "$CONTAINER_PREFIX" "$rank"
+}
+
+collect_gpu_snapshot() {
+  local label="$1" host rank=0
+  for host in "${NODE_HOSTS[@]}"; do
+    sudo_host "$host" nvidia-smi \
+      --query-gpu=timestamp,index,memory.used,memory.total,utilization.gpu,power.draw \
+      --format=csv,noheader,nounits \
+      >"$RESULT_ROOT/gpu/${label}_node${rank}.csv" 2>&1 || true
+    rank=$((rank + 1))
+  done
+}
+
+collect_service_logs() {
+  local label="$1" host rank=0 name
+  for host in "${NODE_HOSTS[@]}"; do
+    name="$(container_name "$rank")"
+    sudo_host "$host" docker logs "$name" \
+      >"$RESULT_ROOT/service/${label}_node${rank}.log" 2>&1 || true
+    rank=$((rank + 1))
+  done
+}
+
+stop_service() {
+  local host rank=0 name
+  for host in "${NODE_HOSTS[@]}"; do
+    name="$(container_name "$rank")"
+    sudo_host "$host" docker rm -f "$name" >/dev/null 2>&1 || true
+    rank=$((rank + 1))
+  done
+}
+
+start_node() {
+  local rank="$1" backend="$2" chunk="$3"
+  local host="${NODE_HOSTS[$rank]}" name bootstrap
+  name="$(container_name "$rank")"
+  bootstrap="export SGLANG_HOST_IP=174.1.60.$((rank + 1)); exec python3 -m sglang.launch_server --model-path ${MODEL_PATH} --served-model-name ${SERVED_MODEL_NAME} --tp-size 32 --ep-size 32 --nnodes 4 --node-rank ${rank} --dist-init-addr ${HEAD_HOST}:${DIST_PORT} --trust-remote-code --moe-runner-backend ${backend} --chunked-prefill-size ${chunk} --mem-fraction-static 0.88 --cuda-graph-max-bs-decode 16 --mamba-radix-cache-strategy extra_buffer_lazy --disable-radix-cache --dist-timeout 3600 --mamba-full-memory-ratio 0.36 --host 0.0.0.0 --port ${PORT}"
+  local -a cmd=(
+    docker run -d --name "$name"
+    --gpus all --network host --ipc=host --ulimit memlock=-1
+    --device /dev/infiniband --shm-size 32g --entrypoint bash
+    -v "${MODEL_PATH}:${MODEL_PATH}:ro"
+    -e CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7
+    -e NCCL_SOCKET_IFNAME=bond0 -e GLOO_SOCKET_IFNAME=bond0
+    -e NCCL_IB_HCA=mlx5_0,mlx5_1,mlx5_2,mlx5_3
+    -e NCCL_IB_GID_INDEX=3 -e NCCL_IB_TIMEOUT=22 -e NCCL_IB_RETRY_CNT=7
+    -e NCCL_CUMEM_ENABLE=1 -e PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True
+    -e SGLANG_ENABLE_TP_MEMORY_INBALANCE_CHECK=0 -e SGLANG_MOE_FUSED_GATE_RADIX=1
+    -e FLASHINFER_DISABLE_JIT=1 -e FLASHINFER_DISABLE_VERSION_CHECK=1
+    "$CANDIDATE_IMAGE" -lc "$bootstrap"
+  )
+  printf '%q ' "${cmd[@]}" >"$RESULT_ROOT/service/${backend}_chunk${chunk}_node${rank}.cmd.txt"
+  printf '\n' >>"$RESULT_ROOT/service/${backend}_chunk${chunk}_node${rank}.cmd.txt"
+  sudo_host "$host" "${cmd[@]}" >/dev/null
+}
+
+wait_health() {
+  local backend="$1" chunk="$2" i
+  for ((i = 1; i <= HEALTH_WAIT_S; i++)); do
+    if curl --fail --silent --max-time 5 "http://${HEAD_HOST}:${PORT}/health" >/dev/null 2>&1; then
+      log "service healthy backend=${backend} chunk=${chunk} wait_s=${i}"
+      return 0
+    fi
+    if (( i % 30 == 0 )); then
+      log "waiting for service backend=${backend} chunk=${chunk} elapsed_s=${i}"
+      collect_service_logs "${backend}_chunk${chunk}_starting"
+      if grep -Eiq 'Traceback|CUDA out of memory|NCCL.*(error|failed)|RuntimeError' \
+          "$RESULT_ROOT/service/${backend}_chunk${chunk}_starting_node"*.log; then
+        log "startup log contains an error; stopping early"
+        return 1
+      fi
+    fi
+    sleep 1
+  done
+  return 1
+}
+
+start_service() {
+  local backend="$1" chunk="$2"
+  stop_service
+  log "starting TP32/EP32 backend=${backend} chunk=${chunk} on 601-604"
+  start_node 1 "$backend" "$chunk"
+  start_node 2 "$backend" "$chunk"
+  start_node 3 "$backend" "$chunk"
+  sleep 5
+  start_node 0 "$backend" "$chunk"
+  if ! wait_health "$backend" "$chunk"; then
+    collect_service_logs "${backend}_chunk${chunk}_startup_failed"
+    stop_service
+    return 1
+  fi
+  collect_gpu_snapshot "${backend}_chunk${chunk}_healthy"
+  collect_service_logs "${backend}_chunk${chunk}_healthy"
+}
+
+run_one_bench() {
+  local backend="$1" chunk="$2" concurrency="$3" repeat="$4"
+  local stem="${backend}_chunk${chunk}_c${concurrency}_r${repeat}"
+  local output_file="${RESULT_ROOT}/raw/${stem}.jsonl"
+  local bench_log="${RESULT_ROOT}/bench/${stem}.log"
+  rm -f "$output_file"
+  log "bench backend=${backend} chunk=${chunk} C=${concurrency} repeat=${repeat}/${REPEATS}"
+  sudo_host "$HEAD_HOST" docker run --rm --network host \
+    -v "${MODEL_PATH}:${MODEL_PATH}:ro" \
+    -v "${DATASET_PATH}:${DATASET_PATH}:ro" \
+    -v "${RESULT_ROOT}:${RESULT_ROOT}" \
+    -e PYTHONUNBUFFERED=1 --entrypoint python3 "$CANDIDATE_IMAGE" \
+    -m "$BENCH_MODULE" \
+    --backend sglang --host "$HEAD_HOST" --port "$PORT" \
+    --dataset-name random --dataset-path "$DATASET_PATH" \
+    --random-input-len "$INPUT_LEN" --random-output-len "$OUTPUT_LEN" \
+    --random-range-ratio 1.0 --num-prompts "$NUM_PROMPTS" \
+    --max-concurrency "$concurrency" --request-rate 10000 \
+    --warmup-requests "$WARMUP_REQUESTS" --output-file "$output_file" \
+    --output-details --disable-tqdm >"$bench_log" 2>&1
+  python3 - "$output_file" "$NUM_PROMPTS" <<'PY'
+import json, sys
+path, expected = sys.argv[1], int(sys.argv[2])
+with open(path, encoding="utf-8") as f:
+    rows = [json.loads(line) for line in f if line.strip()]
+assert len(rows) == 1, (path, len(rows))
+assert rows[0].get("completed") == expected, rows[0].get("completed")
+assert not any(rows[0].get("errors", [])), "benchmark contains request errors"
+PY
+}
+
+run_matrix() {
+  require_password
+  check_inputs
+  local backend chunk concurrency repeat label
+  collect_gpu_snapshot before_all
+  for chunk in "${CHUNKED_PREFILL_SIZES[@]}"; do
+    for backend in "${BACKENDS[@]}"; do
+      label="${backend}_chunk${chunk}"
+      if ! start_service "$backend" "$chunk"; then
+        log "ERROR: service failed for ${label}; preserving evidence and aborting"
+        return 1
+      fi
+      for concurrency in "${CONCURRENCIES[@]}"; do
+        for ((repeat = 1; repeat <= REPEATS; repeat++)); do
+          run_one_bench "$backend" "$chunk" "$concurrency" "$repeat"
+        done
+      done
+      collect_service_logs "${label}_completed"
+      collect_gpu_snapshot "${label}_completed"
+      stop_service
+      sleep 5
+    done
+  done
+  collect_gpu_snapshot after_all
+}
+
+summarize() {
+  python3 - "$RESULT_ROOT" <<'PY'
+import csv, json, re, statistics, sys
+from pathlib import Path
+
+root = Path(sys.argv[1])
+pattern = re.compile(r"(.+)_chunk(\d+)_c(\d+)_r(\d+)\.jsonl$")
+fields = [
+    "backend", "chunked_prefill_size", "concurrency", "repeat", "completed",
+    "duration", "request_throughput", "input_throughput", "output_throughput",
+    "total_throughput", "mean_ttft_ms", "median_ttft_ms", "p95_ttft_ms",
+    "p99_ttft_ms", "mean_e2e_latency_ms", "median_e2e_latency_ms",
+    "p95_e2e_latency_ms", "p99_e2e_latency_ms",
+]
+rows = []
+for path in sorted((root / "raw").glob("*.jsonl")):
+    match = pattern.match(path.name)
+    if not match:
+        continue
+    with path.open(encoding="utf-8") as f:
+        data = next(json.loads(line) for line in f if line.strip())
+    backend, chunk, concurrency, repeat = match.groups()
+    row = {key: data.get(key) for key in fields}
+    row.update(
+        backend=backend,
+        chunked_prefill_size=int(chunk),
+        concurrency=int(concurrency),
+        repeat=int(repeat),
+    )
+    rows.append(row)
+
+with (root / "results.csv").open("w", newline="", encoding="utf-8") as f:
+    writer = csv.DictWriter(f, fieldnames=fields)
+    writer.writeheader()
+    writer.writerows(rows)
+
+metric_names = [
+    "request_throughput", "input_throughput", "total_throughput",
+    "mean_ttft_ms", "median_ttft_ms", "p95_ttft_ms", "p99_ttft_ms",
+    "mean_e2e_latency_ms", "median_e2e_latency_ms", "p95_e2e_latency_ms",
+]
+groups = {}
+for row in rows:
+    key = (row["backend"], row["chunked_prefill_size"], row["concurrency"])
+    groups.setdefault(key, []).append(row)
+
+summary = []
+for (backend, chunk, concurrency), group in sorted(groups.items()):
+    item = {
+        "backend": backend,
+        "chunked_prefill_size": chunk,
+        "concurrency": concurrency,
+        "repeats": len(group),
+        "completed_each": [row["completed"] for row in group],
+    }
+    for metric in metric_names:
+        values = [float(row[metric]) for row in group if row.get(metric) is not None]
+        item[f"median_{metric}"] = statistics.median(values) if values else None
+    summary.append(item)
+
+comparisons = []
+index = {(x["backend"], x["chunked_prefill_size"], x["concurrency"]): x for x in summary}
+for chunk in sorted({x["chunked_prefill_size"] for x in summary}):
+    for concurrency in sorted({x["concurrency"] for x in summary}):
+        base = index.get(("marlin", chunk, concurrency))
+        cand = index.get(("flashinfer_mxfp4", chunk, concurrency))
+        if not base or not cand:
+            continue
+        comp = {"chunked_prefill_size": chunk, "concurrency": concurrency}
+        for metric in ("input_throughput", "total_throughput"):
+            b = base[f"median_{metric}"]
+            c = cand[f"median_{metric}"]
+            comp[f"flashinfer_{metric}_change_pct"] = (c / b - 1.0) * 100.0
+        for metric in ("median_ttft_ms", "p95_ttft_ms", "median_e2e_latency_ms"):
+            b = base[f"median_{metric}"]
+            c = cand[f"median_{metric}"]
+            comp[f"flashinfer_{metric}_change_pct"] = (c / b - 1.0) * 100.0
+        comparisons.append(comp)
+
+payload = {"run_id": root.name, "summary": summary, "comparisons": comparisons}
+(root / "summary.json").write_text(json.dumps(payload, indent=2), encoding="utf-8")
+print(json.dumps(payload, indent=2))
+PY
+}
+
+cleanup() {
+  collect_service_logs cleanup 2>/dev/null || true
+  stop_service 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+case "$ACTION" in
+  build-image)
+    build_image_all_nodes
+    ;;
+  run)
+    run_matrix
+    summarize
+    ;;
+  all)
+    build_image_all_nodes
+    run_matrix
+    summarize
+    ;;
+  summarize)
+    summarize
+    ;;
+  stop)
+    stop_service
+    ;;
+  -h|--help|help)
+    usage
+    ;;
+  *)
+    usage >&2
+    exit 2
+    ;;
+esac
+
+trap - EXIT INT TERM
+log "action=${ACTION} complete run_id=${RUN_ID} result_root=${RESULT_ROOT}"