rl-post-train-artifacts / scripts /wait_for_cfg_resume_gpu.sh
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#!/usr/bin/env bash
# Bounded, non-invasive waiter for the C3 resume gate on a shared host.
# It never stops another process and delegates all launch guards to the main
# CFG launcher after selecting a fresh pair of genuinely idle physical GPUs.
set -euo pipefail
PROJECT_ROOT="/data/myx/RL_post_train"
RESUME_DIR=""
MAX_ATTEMPTS="${CFG_RESUME_MAX_ATTEMPTS:-3}"
POLL_SECONDS="${CFG_RESUME_POLL_SECONDS:-60}"
RUN_PREFIX="recap_cfg_c3_resume"
usage() {
cat <<'EOF'
Usage: wait_for_cfg_resume_gpu.sh --resume-dir PATH [options]
Options:
--resume-dir PATH Existing global_step_20 checkpoint directory.
--max-attempts N Retry bound after a shared-GPU race (default: 3).
--poll-seconds N Poll interval (default: 60).
--run-prefix NAME Prefix for child launcher run IDs.
EOF
}
while (($# > 0)); do
case "$1" in
--resume-dir) RESUME_DIR="$2"; shift 2 ;;
--max-attempts) MAX_ATTEMPTS="$2"; shift 2 ;;
--poll-seconds) POLL_SECONDS="$2"; shift 2 ;;
--run-prefix) RUN_PREFIX="$2"; shift 2 ;;
-h|--help) usage; exit 0 ;;
*) echo "Unknown argument: $1" >&2; usage >&2; exit 2 ;;
esac
done
if [[ -z "${RESUME_DIR}" || ! -d "${RESUME_DIR}" ]]; then
echo "--resume-dir must name an existing checkpoint directory" >&2
exit 2
fi
if [[ "${RESUME_DIR}" != /data/myx/* ]]; then
echo "resume-dir must remain under /data/myx: ${RESUME_DIR}" >&2
exit 2
fi
if [[ ! "${MAX_ATTEMPTS}" =~ ^[1-9][0-9]*$ || ! "${POLL_SECONDS}" =~ ^[1-9][0-9]*$ ]]; then
echo "max-attempts and poll-seconds must be positive integers" >&2
exit 2
fi
if [[ ! "${RUN_PREFIX}" =~ ^[A-Za-z0-9_.-]+$ ]]; then
echo "run-prefix contains unsafe characters: ${RUN_PREFIX}" >&2
exit 2
fi
LOG_DIR="${PROJECT_ROOT}/logs/recap/cfg"
mkdir -p "${LOG_DIR}"
LOG_FILE="${LOG_DIR}/c3_resume_wait_$(date +%Y%m%d_%H%M%S).log"
exec >>"${LOG_FILE}" 2>&1
echo "CFG_RESUME_WAITER_START resume_dir=${RESUME_DIR} max_attempts=${MAX_ATTEMPTS} poll_seconds=${POLL_SECONDS}"
attempt=0
while ((attempt < MAX_ATTEMPTS)); do
echo "CFG_RESUME_WAITER_POLL time=$(date --iso-8601=seconds) attempt=${attempt}"
if ! gpu_rows="$(nvidia-smi --query-gpu=index,memory.used,utilization.gpu --format=csv,noheader,nounits 2>/dev/null)"; then
echo "CFG_RESUME_WAITER_DRIVER_UNAVAILABLE"
sleep "${POLL_SECONDS}"
continue
fi
free_gpus=()
while IFS=',' read -r gpu memory utilization; do
gpu="$(printf '%s' "${gpu}" | tr -d '[:space:]')"
memory="$(printf '%s' "${memory}" | tr -d '[:space:]')"
utilization="$(printf '%s' "${utilization}" | tr -d '[:space:]')"
[[ "${gpu}" =~ ^[0-9]+$ && "${memory}" =~ ^[0-9]+$ && "${utilization}" =~ ^[0-9]+$ ]] || continue
compute_pids="$(nvidia-smi -i "${gpu}" --query-compute-apps=pid --format=csv,noheader,nounits 2>/dev/null | awk '$1 ~ /^[0-9]+$/ {print $1}' | tr -d '[:space:]')"
echo "CFG_RESUME_WAITER_GPU gpu=${gpu} memory_mb=${memory} util_pct=${utilization} compute_pids=${compute_pids:-none}"
if ((memory <= 1024 && utilization <= 5)) && [[ -z "${compute_pids}" ]]; then
free_gpus+=("${gpu}")
fi
done <<<"${gpu_rows}"
if ((${#free_gpus[@]} < 2)); then
echo "CFG_RESUME_WAITER_WAIT free_count=${#free_gpus[@]}"
sleep "${POLL_SECONDS}"
continue
fi
if pgrep -af "[r]aylet|[g]cs_server|[p]lasma_store" >/dev/null 2>&1; then
echo "CFG_RESUME_WAITER_RAY_BLOCKED"
sleep "${POLL_SECONDS}"
continue
fi
gpus="${free_gpus[0]},${free_gpus[1]}"
run_id="${RUN_PREFIX}_$(date +%Y%m%d_%H%M%S)"
attempt=$((attempt + 1))
echo "CFG_RESUME_WAITER_LAUNCH run_id=${run_id} gpus=${gpus} attempt=${attempt}"
set +e
"${PROJECT_ROOT}/scripts/run_cfg_task0.sh" \
--mode c3_resume \
--gpus "${gpus}" \
--resume-dir "${RESUME_DIR}" \
--run-id "${run_id}"
rc=$?
set -e
echo "CFG_RESUME_WAITER_CHILD_DONE run_id=${run_id} exit_code=${rc}"
if ((rc == 0)); then
echo "CFG_RESUME_WAITER_DONE run_id=${run_id}"
exit 0
fi
if ((attempt >= MAX_ATTEMPTS)); then
echo "CFG_RESUME_WAITER_FAILED attempts=${attempt}"
exit "${rc}"
fi
sleep "${POLL_SECONDS}"
done
echo "CFG_RESUME_WAITER_FAILED attempts=${attempt}"
exit 1