#!/bin/bash
# Find the busy thread (the one eating CPU)
echo "=== BUSY THREADS ==="
for tid in $(ls /proc/15070/task/); do
    utime1=$(cat /proc/15070/task/$tid/stat 2>/dev/null | awk '{print $14}')
    sleep 1
    utime2=$(cat /proc/15070/task/$tid/stat 2>/dev/null | awk '{print $14}')
    if [ -n "$utime1" ] && [ -n "$utime2" ]; then
        diff=$((utime2 - utime1))
        if [ "$diff" -gt 50 ]; then
            echo "Thread $tid: delta_utime=$diff (BUSY)"
            wchan=$(cat /proc/15070/task/$tid/wchan 2>/dev/null)
            echo "  wchan: $wchan"
        fi
    fi
done

echo "=== STRACE SAMPLE (2s) ==="
sudo timeout 2 strace -p 15070 -e trace=write,read,openat -c 2>&1 | head -30
