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505 lines
20 KiB
505 lines
20 KiB
#!/bin/bash
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# shellcheck disable=SC1091,SC2034
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# This experiment is intended to document how the level of concurrent requests influence the latency, throughput, and success rate
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# Success - The percentage of requests that complete by their deadlines
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# Throughput - The mean number of successful requests per second
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# Latency - the rount-trip resonse time (us) of successful requests at the p50, p90, p99, and p100 percentiles
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# Add bash_libraries directory to path
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__run_sh__base_path="$(dirname "$(realpath --logical "${BASH_SOURCE[0]}")")"
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__run_sh__bash_libraries_relative_path="../bash_libraries"
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__run_sh__bash_libraries_absolute_path=$(cd "$__run_sh__base_path" && cd "$__run_sh__bash_libraries_relative_path" && pwd)
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export PATH="$__run_sh__bash_libraries_absolute_path:$PATH"
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source csv_to_dat.sh || exit 1
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source framework.sh || exit 1
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source generate_gnuplots.sh || exit 1
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source get_result_count.sh || exit 1
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source panic.sh || exit 1
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source path_join.sh || exit 1
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source percentiles_table.sh || exit 1
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source experiment_globals.sh || exit 1
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validate_dependencies hey loadtest jq
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# The global configs for the scripts
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declare -r CLIENT_TERMINATE_SERVER=false
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declare -r ITERATIONS=10000
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declare -r DURATION_sec=1
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declare -r ESTIMATIONS_PERCENTILE=70
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declare -r TENANT_NG="NNN"
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declare -r TENANT_GR="GWU"
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declare -ar TENANTS=("$TENANT_NG" "$TENANT_GR")
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declare -Ar ARGS=(
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[$TENANT_NG]="30"
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[$TENANT_GR]="30"
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)
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# Make sure not to use 55555 (Reserved for Admin)
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declare -Ar PORTS=(
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[$TENANT_NG]=10030
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[$TENANT_GR]=20030
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)
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# No need for slashes
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declare -Ar ROUTES=(
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[$TENANT_NG]="fib"
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[$TENANT_GR]="fib"
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)
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declare -Ar MTDS_REPLENISH_PERIODS_us=(
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[$TENANT_NG]=0
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[$TENANT_GR]=16000
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)
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declare -Ar MTDS_MAX_BUDGETS_us=(
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[$TENANT_NG]=0
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[$TENANT_GR]=144000
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)
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declare -Ar MTDBF_RESERVATIONS_percen=(
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[$TENANT_NG]=0
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[$TENANT_GR]=0
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)
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declare -ar WORKLOADS=("${TENANT_NG}-${ROUTES[$TENANT_NG]}" "${TENANT_GR}-${ROUTES[$TENANT_GR]}")
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declare -Ar EXPECTED_EXECUTIONS_us=(
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[${WORKLOADS[0]}]=4000
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[${WORKLOADS[1]}]=4000
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)
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declare -Ar DEADLINES_us=(
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[${WORKLOADS[0]}]=16000
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[${WORKLOADS[1]}]=16000
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)
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# Generate the spec.json file from the given arguments above
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. "$__run_sh__bash_libraries_absolute_path/generate_spec_json.sh"
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# Execute the experiments concurrently
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run_experiments() {
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assert_run_experiments_args "$@"
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local -r hostname="$1"
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local -r results_directory="$2"
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local -r loadgen="$3"
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# The duration in seconds that the low priority task should run before the high priority task starts
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local -ir OFFSET=1
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printf "Running Experiments with %s\n" "$loadgen"
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# Run concurrently
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local app_gr_PID
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local app_ng_PID
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local -r port_ng=${PORTS[$TENANT_NG]}
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local -r port_gr=${PORTS[$TENANT_GR]}
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local -r route_ng=${ROUTES[$TENANT_NG]}
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local -r route_gr=${ROUTES[$TENANT_GR]}
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local -r workload_ng=${WORKLOADS[0]}
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local -r workload_gr=${WORKLOADS[1]}
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local -r deadline_ng=${DEADLINES_us[$workload_ng]}
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local -r deadline_gr=${DEADLINES_us[$workload_gr]}
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local -r con_ng=$((NWORKERS*10))
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local -r con_gr=$((NWORKERS*2))
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local -r rps_ng=$((1000000*con_ng/deadline_ng))
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local -r rps_gr=$((1000000*con_gr/deadline_gr))
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local -r arg_ng=${ARGS[$TENANT_NG]}
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local -r arg_gr=${ARGS[$TENANT_GR]}
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if [ "$loadgen" = "hey" ]; then
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hey -disable-compression -disable-keepalive -disable-redirects -z $((DURATION_sec+OFFSET))s -n "$ITERATIONS" -c $con_ng -t 0 -o csv -m POST -d "$arg_ng" "http://${hostname}:$port_ng/$route_ng" > "$results_directory/$workload_ng.csv" 2> "$results_directory/$workload_ng-err.dat" &
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app_ng_PID="$!"
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sleep "$OFFSET"s
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hey -disable-compression -disable-keepalive -disable-redirects -z "$DURATION_sec"s -n "$ITERATIONS" -c $con_gr -t 0 -o csv -m POST -d "$arg_gr" "http://${hostname}:$port_gr/$route_gr" > "$results_directory/$workload_gr.csv" 2> "$results_directory/$workload_gr-err.dat" &
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app_gr_PID="$!"
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elif [ "$loadgen" = "loadtest" ]; then
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loadtest -t $((DURATION_sec+OFFSET)) -c $con_ng --rps $rps_ng -P "$arg_ng" "http://${hostname}:$port_ng/$route_ng" > "$results_directory/$workload_ng.dat" 2> "$results_directory/$workload_ng-err.dat" &
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app_ng_PID="$!"
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sleep "$OFFSET"s
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loadtest -t "$DURATION_sec" -c $con_gr --rps $rps_gr -P "$arg_gr" "http://${hostname}:$port_gr/$route_gr" > "$results_directory/$workload_gr.dat" 2> "$results_directory/$workload_gr-err.dat" &
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app_gr_PID="$!"
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fi
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wait -f "$app_gr_PID" || {
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printf "\t%s: [ERR]\n" "$workload_gr"
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panic "failed to wait -f ${app_gr_PID}"
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return 1
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}
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[ "$loadgen" = "hey" ] && (get_result_count "$results_directory/$workload_gr.csv" || {
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printf "\t%s: [ERR]\n" "$workload_gr"
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panic "$workload_gr has zero requests."
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return 1
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})
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printf "\t%s: [OK]\n" "$workload_gr"
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wait -f "$app_ng_PID" || {
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printf "\t%s: [ERR]\n" "$workload_ng"
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panic "failed to wait -f ${app_ng_PID}"
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return 1
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}
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[ "$loadgen" = "hey" ] && (get_result_count "$results_directory/$workload_ng.csv" || {
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printf "\t%s: [ERR]\n" "$workload_ng"
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panic "$workload_ng has zero requests."
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return 1
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})
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printf "\t%s: [OK]\n" "$workload_ng"
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if [ "$CLIENT_TERMINATE_SERVER" == true ]; then
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printf "Sent a Terminator to the server\n"
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echo "55" | http "$hostname":55555/terminator &> /dev/null
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fi
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return 0
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}
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# Process the experimental results and generate human-friendly results for success rate, throughput, and latency
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process_client_results_hey() {
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assert_process_client_results_args "$@"
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local -r results_directory="$1"
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printf "Processing HEY Results: "
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# Write headers to CSVs
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printf "Workload,Scs%%,TOTAL,ClientScs,All200,AllFail,Deny,MisDL,Shed,MiscErr\n" >> "$results_directory/success.csv"
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printf "Workload,Throughput\n" >> "$results_directory/throughput.csv"
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percentiles_table_header "$results_directory/latency.csv" "Workload"
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# percentiles_table_header "$results_directory/latency-200.csv" "Workload"
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for workload in "${WORKLOADS[@]}"; do
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local -i deadline=${DEADLINES_us[$workload]}
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# Some requests come back with an "Unsolicited response ..." See issue #185
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misc_err=$(wc -l < "$results_directory/$workload-err.dat")
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# Calculate Success Rate for csv (percent of requests that return 200 within deadline)
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awk -v misc_err="$misc_err" -F, '
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$7 == 200 && ($1 * 1000000) <= '"$deadline"' {ok++}
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$7 == 200 {all200++}
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$7 != 200 {total_failed++}
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$7 == 429 {denied++}
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$7 == 408 {missed_dl++}
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$7 == 409 {killed++}
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END{printf "'"$workload"',%3.1f,%d,%d,%d,%d,%d,%d,%d,%d\n", (ok/(NR-1+misc_err)*100), (NR-1+misc_err), ok, all200, (total_failed-1+misc_err), denied, missed_dl, killed, misc_err}
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' < "$results_directory/$workload.csv" >> "$results_directory/success.csv"
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# Convert from s to us, and sort
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awk -F, 'NR > 1 {print ($1 * 1000000)}' < "$results_directory/$workload.csv" \
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| sort -g > "$results_directory/$workload-response.csv"
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# Filter on 200s, convert from s to us, and sort
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awk -F, '$7 == 200 {print ($1 * 1000000)}' < "$results_directory/$workload.csv" \
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| sort -g > "$results_directory/$workload-response-200.csv"
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# Get Number of all entries
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all=$(wc -l < "$results_directory/$workload-response.csv")
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((all == 0)) && continue # If all errors, skip line
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# Get Number of 200s
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oks=$(wc -l < "$results_directory/$workload-response-200.csv")
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# ((oks == 0)) && continue # If all errors, skip line
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# We determine duration by looking at the timestamp of the last complete request
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# TODO: Should this instead just use the client-side synthetic DURATION_sec value?
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duration=$(tail -n1 "$results_directory/$workload.csv" | cut -d, -f8)
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# Throughput is calculated as the mean number of successful requests per second
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throughput=$(echo "$oks/$duration" | bc)
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printf "%s,%d\n" "$workload" "$throughput" >> "$results_directory/throughput.csv"
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# Generate Latency Data for csv
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percentiles_table_row "$results_directory/$workload-response.csv" "$results_directory/latency.csv" "$workload"
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# percentiles_table_row "$results_directory/$workload-response-200.csv" "$results_directory/latency-200.csv" "$workload"
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# Delete scratch file used for sorting/counting
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rm "$results_directory/$workload-response.csv" "$results_directory/$workload-response-200.csv"
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done
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# Transform csvs to dat files for gnuplot
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csv_to_dat "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
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rm "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
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printf "[OK]\n"
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return 0
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}
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# Process the experimental results and generate human-friendly results for success rate, throughput, and latency
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process_client_results_loadtest() {
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assert_process_client_results_args "$@"
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local -r results_directory="$1"
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printf "Processing Loadtest Results: "
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# Write headers to CSVs
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printf "Workload,Scs%%,TOTAL,All200,AllFail,Deny,MisDL,Shed,MiscErr\n" >> "$results_directory/success.csv"
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printf "Workload,Throughput\n" >> "$results_directory/throughput.csv"
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percentiles_table_header "$results_directory/latency.csv" "Workload"
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for workload in "${WORKLOADS[@]}"; do
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if [[ ! -f "$results_directory/$workload.dat" ]]; then
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printf "[ERR]\n"
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error_msg "Missing $results_directory/$workload.dat"
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return 1
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fi
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# Get Number of 200s and then calculate Success Rate (percent of requests that return 200)
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# If using loadtest -n option (not -t), then use all200/iterations instead of all200/total.
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total=$(grep "Completed requests:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 13)
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total_failed=$(grep "Total errors:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 13)
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denied=$(grep "429:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)
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missed_dl=$(grep "408:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)
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killed=$(grep "409:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)
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misc_err=$(grep "\-1:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)
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all200=$((total-total_failed))
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# ((all200 == 0)) && continue # If all errors, skip line
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success_rate=$(echo "scale=2; $all200/$total*100"|bc)
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printf "%s,%3.1f,%d,%d,%d,%d,%d,%d,%d\n" "$workload" "$success_rate" "$total" "$all200" "$total_failed" "$denied" "$missed_dl" "$killed" "$misc_err" >> "$results_directory/success.csv"
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# Throughput is calculated as the mean number of successful requests per second
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duration=$(grep "Total time:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 13)
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printf -v duration %.0f "$duration"
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# throughput=$(grep "Requests per second" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 14 | tail -n 1) # throughput of ALL
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throughput=$(echo "$all200/$duration" | bc)
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printf "%s,%d\n" "$workload" "$throughput" >> "$results_directory/throughput.csv"
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# Generate Latency Data
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min=0 # not provided by loadtest
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p50=$(echo "$(grep 50% "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)*1000" |bc)
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p90=$(echo "$(grep 90% "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)*1000" |bc)
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p99=$(echo "$(grep 99% "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12)*1000" |bc)
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p100=$(echo "$(grep 100% "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 12 | tail -n 1)*1000" |bc)
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mean=$(echo "scale=1;$(grep "Mean latency:" "$results_directory/${workload}.dat" | tr -s ' ' | cut -d ' ' -f 13)*1000" |bc)
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printf "%s,%d,%d,%.1f,%d,%d,%d,%d\n" "$workload" "$total" "$min" "$mean" "$p50" "$p90" "$p99" "$p100" >> "$results_directory/latency.csv"
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done
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# Transform csvs to dat files for gnuplot
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csv_to_dat "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
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rm "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
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printf "[OK]\n"
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return 0
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}
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process_server_results() {
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assert_process_server_results_args "$@"
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local -r results_directory="${1:?results_directory not set}"
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printf "Processing Server Results: \n"
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num_of_lines=$(wc -l < "$results_directory/$SERVER_LOG_FILE")
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if [ "$num_of_lines" == 1 ]; then
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printf "No results to process! Exiting the script."
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return 1
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fi
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# Write headers to CSVs
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printf "Workload,Scs%%,TOTAL,SrvScs,All200,AllFail,DenyAny,DenyG,MisDL_Glb,MisDL_Loc,Shed_Glb,Shed_Loc,QueFull\n" >> "$results_directory/success.csv"
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printf "Workload,Throughput\n" >> "$results_directory/throughput.csv"
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percentiles_table_header "$results_directory/latency.csv" "Workload"
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# Write headers to CSVs
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for metric in "${SANDBOX_METRICS[@]}"; do
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percentiles_table_header "$results_directory/$metric.csv" "Workload"
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done
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percentiles_table_header "$results_directory/running_user_200.csv" "Workload"
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percentiles_table_header "$results_directory/running_user_nonzero.csv" "Workload"
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percentiles_table_header "$results_directory/total_200.csv" "Workload"
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# percentiles_table_header "$results_directory/memalloc.csv" "module"
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for workload in "${WORKLOADS[@]}"; do
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mkdir "$results_directory/$workload"
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local -i deadline=${DEADLINES_us[$workload]}
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for metric in "${SANDBOX_METRICS[@]}"; do
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awk -F, '
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{workload = sprintf("%s-%s", $'"$SANDBOX_TENANT_NAME_FIELD"', substr($'"$SANDBOX_ROUTE_FIELD"',2))}
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workload == "'"$workload"'" {printf("%d,%d\n", $'"${SANDBOX_METRICS_FIELDS[$metric]}"' / $'"$SANDBOX_CPU_FREQ_FIELD"', $'"$SANDBOX_RESPONSE_CODE_FIELD"')}
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' < "$results_directory/$SERVER_LOG_FILE" | sort -g > "$results_directory/$workload/${metric}_sorted.csv"
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percentiles_table_row "$results_directory/$workload/${metric}_sorted.csv" "$results_directory/${metric}.csv" "$workload"
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# Delete scratch file used for sorting/counting
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# rm "$results_directory/$workload/${metric}_sorted.csv"
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done
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awk -F, '$2 == 200 {printf("%d,%d\n", $1, $2)}' < "$results_directory/$workload/running_user_sorted.csv" > "$results_directory/$workload/running_user_200_sorted.csv"
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percentiles_table_row "$results_directory/$workload/running_user_200_sorted.csv" "$results_directory/running_user_200.csv" "$workload"
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awk -F, '$1 > 0 {printf("%d,%d\n", $1, $2)}' < "$results_directory/$workload/running_user_sorted.csv" > "$results_directory/$workload/running_user_nonzero_sorted.csv"
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percentiles_table_row "$results_directory/$workload/running_user_nonzero_sorted.csv" "$results_directory/running_user_nonzero.csv" "$workload"
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awk -F, '$2 == 200 {printf("%d,%d\n", $1, $2)}' < "$results_directory/$workload/total_sorted.csv" > "$results_directory/$workload/total_200_sorted.csv"
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percentiles_table_row "$results_directory/$workload/total_200_sorted.csv" "$results_directory/total_200.csv" "$workload"
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# Memory Allocation
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# awk -F, '$2 == "'"$workload"'" {printf("%.0f\n", $MEMORY_FIELD)}' < "$results_directory/$SERVER_LOG_FILE" | sort -g > "$results_directory/$workload/memalloc_sorted.csv"
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# percentiles_table_row "$results_directory/$workload/memalloc_sorted.csv" "$results_directory/memalloc.csv" "$workload" "%1.0f"
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# Calculate Success Rate for csv (percent of requests that complete), $1 and deadline are both in us, so not converting
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awk -F, '
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$2 == 200 && $1 <= '"$deadline"' {ok++}
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$2 == 200 {all200++}
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$2 != 200 {total_failed++}
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$2 == 4290 {denied_any++}
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$2 == 4291 {denied_gtd++}
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$2 == 4080 {mis_dl_glob++}
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$2 == 4081 {mis_dl_local++}
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$2 == 4090 {shed_glob++}
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$2 == 4091 {shed_local++}
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$2 == 999 {global_full++}
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END{printf "'"$workload"',%3.1f,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d\n", (ok/NR*100), NR, ok, all200, total_failed, denied_any, denied_gtd, mis_dl_glob, mis_dl_local, shed_glob, shed_local, global_full}
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' < "$results_directory/$workload/total_sorted.csv" >> "$results_directory/success.csv"
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# Throughput is calculated on the client side, so ignore the below line
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printf "%s,%d\n" "$workload" "1" >> "$results_directory/throughput.csv"
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# Generate Latency Data for csv
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percentiles_table_row "$results_directory/$workload/total_sorted.csv" "$results_directory/latency.csv" "$workload"
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# Delete scratch file used for sorting/counting
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# rm "$results_directory/$workload/memalloc_sorted.csv"
|
|
|
|
# Delete directory
|
|
# rm -rf "${results_directory:?}/${workload:?}"
|
|
|
|
done
|
|
|
|
# Transform csvs to dat files for gnuplot
|
|
for metric in "${SANDBOX_METRICS[@]}"; do
|
|
csv_to_dat "$results_directory/$metric.csv"
|
|
rm "$results_directory/$metric.csv"
|
|
done
|
|
csv_to_dat "$results_directory/running_user_200.csv" "$results_directory/running_user_nonzero.csv" "$results_directory/total_200.csv"
|
|
rm "$results_directory/running_user_200.csv" "$results_directory/running_user_nonzero.csv" "$results_directory/total_200.csv"
|
|
|
|
# csv_to_dat "$results_directory/memalloc.csv"
|
|
csv_to_dat "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
|
|
# rm "$results_directory/memalloc.csv"
|
|
rm "$results_directory/success.csv" "$results_directory/throughput.csv" "$results_directory/latency.csv"
|
|
|
|
printf "[OK]\n"
|
|
return 0
|
|
}
|
|
|
|
process_server_http_results() {
|
|
assert_process_server_results_args "$@"
|
|
|
|
local -r results_directory="${1:?results_directory not set}"
|
|
|
|
printf "Processing Server HTTP Results: \n"
|
|
|
|
num_of_lines=$(wc -l < "$results_directory/$SERVER_HTTP_LOG_FILE")
|
|
if [ "$num_of_lines" == 1 ]; then
|
|
printf "No results to process! Exiting the script."
|
|
return 1
|
|
fi
|
|
|
|
for metric in "${HTTP_METRICS[@]}"; do
|
|
percentiles_table_header "$results_directory/$metric.csv" "workload"
|
|
done
|
|
|
|
for workload in "${WORKLOADS[@]}"; do
|
|
mkdir -p "$results_directory/$workload"
|
|
|
|
for metric in "${HTTP_METRICS[@]}"; do
|
|
awk -F, '
|
|
{workload = sprintf("%s-%s", $'"$HTTP_TENANT_NAME_FIELD"', substr($'"$HTTP_ROUTE_FIELD"',2))}
|
|
workload == "'"$workload"'" {printf("%.1f\n", $'"${HTTP_METRICS_FIELDS[$metric]}"' / $'"$HTTP_CPU_FREQ_FIELD"')}
|
|
' < "$results_directory/$SERVER_HTTP_LOG_FILE" | sort -g > "$results_directory/$workload/${metric}_sorted.csv"
|
|
|
|
percentiles_table_row "$results_directory/$workload/${metric}_sorted.csv" "$results_directory/${metric}.csv" "$workload"
|
|
|
|
# Delete directory
|
|
# rm -rf "${results_directory:?}/${workload:?}"
|
|
done
|
|
done
|
|
|
|
# Transform CSVs to dat files for gnuplot
|
|
for metric in "${HTTP_METRICS[@]}"; do
|
|
csv_to_dat "$results_directory/$metric.csv"
|
|
rm "$results_directory/$metric.csv"
|
|
done
|
|
|
|
printf "[OK]\n"
|
|
return 0
|
|
}
|
|
|
|
experiment_server_post() {
|
|
local -r results_directory="$1"
|
|
|
|
# Only process data if SLEDGE_SANDBOX_PERF_LOG was set when running sledgert
|
|
if [[ -n "$SLEDGE_SANDBOX_PERF_LOG" ]]; then
|
|
if [[ -f "$__run_sh__base_path/$SLEDGE_SANDBOX_PERF_LOG" ]]; then
|
|
mv "$__run_sh__base_path/$SLEDGE_SANDBOX_PERF_LOG" "$results_directory/$SERVER_LOG_FILE"
|
|
process_server_results "$results_directory" || return 1
|
|
rm "$results_directory/$SLEDGE_SANDBOX_PERF_LOG"
|
|
else
|
|
echo "Sandbox Perf Log was set, but $SERVER_LOG_FILE not found!"
|
|
fi
|
|
fi
|
|
|
|
if [[ -n "$SLEDGE_HTTP_SESSION_PERF_LOG" ]]; then
|
|
if [[ -f "$__run_sh__base_path/$SLEDGE_HTTP_SESSION_PERF_LOG" ]]; then
|
|
mv "$__run_sh__base_path/$SLEDGE_HTTP_SESSION_PERF_LOG" "$results_directory/$SERVER_HTTP_LOG_FILE"
|
|
process_server_http_results "$results_directory" || return 1
|
|
rm "$results_directory/$SERVER_HTTP_LOG_FILE"
|
|
else
|
|
echo "HTTP Perf Log was set, but $SERVER_HTTP_LOG_FILE not found!"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# Expected Symbol used by the framework
|
|
experiment_client() {
|
|
local -r target_hostname="$1"
|
|
local -r results_directory="$2"
|
|
local loadgen="$3"
|
|
|
|
if [ "$loadgen" = "" ]; then
|
|
loadgen="hey"
|
|
echo "No load generator specified. So, defaulting to HEY!"
|
|
elif [ $loadgen = "lt" ]; then
|
|
loadgen="loadtest"
|
|
fi
|
|
|
|
#run_samples "$target_hostname" "$loadgen" || return 1
|
|
run_experiments "$target_hostname" "$results_directory" "$loadgen" || return 1
|
|
|
|
if [ "$loadgen" = "hey" ]; then
|
|
process_client_results_hey "$results_directory" || return 1
|
|
elif [ "$loadgen" = "loadtest" ]; then
|
|
process_client_results_loadtest "$results_directory" || return 1
|
|
else
|
|
echo "Unknown load generator \"$loadgen\" was entered!"
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
generate_spec_json
|
|
framework_init "$@"
|