210 lines
6.6 KiB
Bash
210 lines
6.6 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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LC_ALL=C
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ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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RUN_ID=$(date +"%Y%m%d_%H%M%S")
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OUT_DIR="$ROOT_DIR/experiment_runs/$RUN_ID"
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mkdir -p "$OUT_DIR"
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LOG_FILE="$OUT_DIR/activity.log"
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log() {
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echo "[$(date -Iseconds)] $*" | tee -a "$LOG_FILE"
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}
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count_processes() {
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ls -d /proc/[0-9]* 2>/dev/null | wc -l
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}
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count_threads_total() {
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awk '/^Threads:/ {sum+=$2} END {print sum+0}' /proc/[0-9]*/status 2>/dev/null || echo 0
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}
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get_mem_kb() {
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awk '/^MemTotal:/ {t=$2} /^MemAvailable:/ {a=$2} END {print t" "a}' /proc/meminfo
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}
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sample_process_csv() {
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local pid="$1"
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local csv="$2"
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local start_uptime="$3"
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local max_seconds="$4"
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local have_pidstat=0
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if command -v pidstat >/dev/null 2>&1; then
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have_pidstat=1
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else
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log "pidstat not found; install sysstat for accurate CPU sampling"
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fi
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local prev_cpu_total=0
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local prev_cpu_idle=0
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if [ -r /proc/stat ]; then
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read -r _ c_user c_nice c_system c_idle c_iowait c_irq c_softirq c_steal _ _ < /proc/stat
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prev_cpu_total=$((c_user + c_nice + c_system + c_idle + c_iowait + c_irq + c_softirq + c_steal))
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prev_cpu_idle=$((c_idle + c_iowait))
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fi
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while kill -0 "$pid" 2>/dev/null; do
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local now_uptime elapsed_s
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now_uptime=$(awk '{print $1}' /proc/uptime)
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elapsed_s=$(awk -v s="$start_uptime" -v n="$now_uptime" 'BEGIN{printf "%.3f", (n-s)}')
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if [ "$max_seconds" -gt 0 ]; then
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if awk -v e="$elapsed_s" -v m="$max_seconds" 'BEGIN{exit (e>m)?0:1}'; then
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log "Timeout reached (${max_seconds}s), stopping PID=$pid"
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kill -TERM "-$pid" 2>/dev/null || true
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sleep 2
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kill -KILL "-$pid" 2>/dev/null || true
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break
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fi
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fi
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local proc_count thread_total
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proc_count=$(count_processes || echo 0)
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thread_total=$(count_threads_total || echo 0)
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local load1 load5 load15
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read -r load1 load5 load15 _ < /proc/loadavg
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local mem_total mem_avail mem_used
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read -r mem_total mem_avail < <(get_mem_kb || echo "0 0")
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mem_used=$((mem_total - mem_avail))
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# Use pidstat for CPU and /proc for memory/thread metrics.
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local cpu rss vsz nlwp
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rss=$(awk '/^VmRSS:/ {print $2}' "/proc/$pid/status" 2>/dev/null || echo 0)
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vsz=$(awk '/^VmSize:/ {print $2}' "/proc/$pid/status" 2>/dev/null || echo 0)
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nlwp=$(awk '/^Threads:/ {print $2}' "/proc/$pid/status" 2>/dev/null || echo 0)
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if [ "$have_pidstat" -eq 1 ]; then
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cpu=$(pidstat -p "$pid" 1 1 2>/dev/null | awk -v p="$pid" '$1 ~ /^[0-9]/ && $3==p {print $8; exit}')
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cpu=${cpu:-0.00}
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else
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cpu=0.00
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fi
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local stk=0 heap=0
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local sys_cpu_pct=0.00
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if [ -r /proc/stat ]; then
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read -r _ c_user c_nice c_system c_idle c_iowait c_irq c_softirq c_steal _ _ < /proc/stat
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local cpu_total=$((c_user + c_nice + c_system + c_idle + c_iowait + c_irq + c_softirq + c_steal))
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local cpu_idle=$((c_idle + c_iowait))
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local dt_total=$((cpu_total - prev_cpu_total))
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local dt_idle=$((cpu_idle - prev_cpu_idle))
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sys_cpu_pct=$(awk -v t="$dt_total" -v i="$dt_idle" 'BEGIN{ if (t<=0) printf "0.00"; else printf "%.2f", (100.0*(t-i))/t }')
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prev_cpu_total=$cpu_total
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prev_cpu_idle=$cpu_idle
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fi
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printf "%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s\n" \
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"$(date -Iseconds)" "$elapsed_s" "$load1" "$load5" "$load15" \
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"$mem_total" "$mem_avail" "$mem_used" "$proc_count" "$thread_total" \
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"$pid" "$cpu" "$sys_cpu_pct" "${rss:-0}" "${vsz:-0}" "${stk:-0}" "${heap:-0}" "${nlwp:-0}" \
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>> "$csv"
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sleep 0.2
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done
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}
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run_with_sampling() {
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local name="$1"
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local cmd="$2"
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local csv="$3"
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local max_seconds="$4"
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log "Starting $name: $cmd"
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echo "timestamp,elapsed_s,load1,load5,load15,mem_total_kb,mem_available_kb,mem_used_kb,proc_count,thread_count_total,pid,cpu_pct,sys_cpu_pct,rss_kb,vsz_kb,stack_kb,heap_kb,proc_threads" > "$csv"
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local start_uptime pid
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start_uptime=$(awk '{print $1}' /proc/uptime)
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if command -v setsid >/dev/null 2>&1; then
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setsid bash -c "$cmd" &
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pid=$!
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else
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bash -c "$cmd" &
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pid=$!
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fi
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sample_process_csv "$pid" "$csv" "$start_uptime" "$max_seconds"
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set +e
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wait "$pid"
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local exit_code=$?
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set -e
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log "Finished $name (exit_code=$exit_code)"
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}
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compile_creation_time() {
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log "Compiling creation_time"
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gcc -O2 -pthread -o "$ROOT_DIR/creation_time_experiment/creation_time" \
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"$ROOT_DIR/creation_time_experiment/creation_time.c"
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}
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compile_fork_bomb() {
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log "Compiling fork_bomb"
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gcc -O2 -o "$ROOT_DIR/fork_bomb/fork_bomb" \
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"$ROOT_DIR/fork_bomb/fork_bomb.c"
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}
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compile_thread_stress() {
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log "Compiling thread_stress"
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gcc -O2 -pthread -o "$ROOT_DIR/thread_stress_test/thread_stress" \
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"$ROOT_DIR/thread_stress_test/thread_stress.c"
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}
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compile_creation_time
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compile_fork_bomb
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compile_thread_stress
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# Defaults (override by env vars)
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ALLOW_DANGEROUS=${ALLOW_DANGEROUS:-0}
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FORK_BOMB_SECONDS=${FORK_BOMB_SECONDS:-5}
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CREATION_TIME_ITERS=${CREATION_TIME_ITERS:-"100 1000 10000"}
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CREATION_TIME_SECONDS=${CREATION_TIME_SECONDS:-60}
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PROC_SAMPLE_STEP=${PROC_SAMPLE_STEP:-50}
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CREATION_TIME_STDOUT="$OUT_DIR/creation_time_stdout.log"
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CREATION_TIME_STDERR="$OUT_DIR/creation_time_stderr.log"
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run_with_sampling \
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"creation_time" \
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"cd '$ROOT_DIR/creation_time_experiment' && { for n in $CREATION_TIME_ITERS; do echo \"=== iterations=\$n ===\"; ./creation_time -n \"\$n\"; done; } >'$CREATION_TIME_STDOUT' 2>'$CREATION_TIME_STDERR'" \
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"$OUT_DIR/creation_time.csv" \
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"$CREATION_TIME_SECONDS"
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if [ "$ALLOW_DANGEROUS" -eq 1 ]; then
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log "Starting fork_bomb (C-side logging)"
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if command -v timeout >/dev/null 2>&1; then
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timeout "$FORK_BOMB_SECONDS" sh -c "cd '$ROOT_DIR/fork_bomb' && FORK_BOMB_CSV='$OUT_DIR/fork_bomb.csv' PROC_SAMPLE_STEP='$PROC_SAMPLE_STEP' ./fork_bomb" || true
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else
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(cd "$ROOT_DIR/fork_bomb" && FORK_BOMB_CSV="$OUT_DIR/fork_bomb.csv" PROC_SAMPLE_STEP="$PROC_SAMPLE_STEP" ./fork_bomb) &
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FB_PID=$!
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sleep "$FORK_BOMB_SECONDS" || true
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kill -TERM "-$FB_PID" 2>/dev/null || true
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sleep 2
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kill -KILL "-$FB_PID" 2>/dev/null || true
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fi
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else
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log "Skipping fork_bomb (set ALLOW_DANGEROUS=1 to run)"
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echo "timestamp,elapsed_s,load1,load5,load15,mem_total_kb,mem_available_kb,mem_used_kb,proc_count,thread_count_total,pid,cpu_pct,sys_cpu_pct,rss_kb,vsz_kb,stack_kb,heap_kb,proc_threads" > "$OUT_DIR/fork_bomb.csv"
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fi
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run_with_sampling \
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"thread_recursive_scaling" \
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"cd '$ROOT_DIR/thread_recursive_scaling' && ./run_thread_recursive.sh 6 6 6" \
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"$OUT_DIR/thread_recursive_scaling.csv" \
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0
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run_with_sampling \
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"thread_stress" \
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"cd '$ROOT_DIR/thread_stress_test' && ./thread_stress" \
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"$OUT_DIR/thread_stress.csv" \
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0
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log "All experiments finished"
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log "Run directory: $OUT_DIR"
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