trace.sh

#!/usr/bin/env bash

cd /sys/kernel/debug/tracing

echo >| trace
echo ext4_* >| set_graph_function
for i in printk irq_exit local_apic_timer_interrupt smp_apic_timer_interrupt; do
        echo $i >> set_graph_notrace
done
echo function_graph >| current_tracer
# Realtime tracing
tail -f trace

cd -