trace.py

#!/usr/bin/env python
#

from bcc import BPF
import time

# define BPF program
prog = """
#include <linux/sched.h>
#include <linux/bpf.h>
BPF_PERF_OUTPUT(events);

int kprobe__htab_map_update_elem() {
    bpf_trace_printk("trace \\n");
    return 0;
}
"""

# load BPF program
b = BPF(text=prog)
#b.attach_kprobe(event="htab_map_update_elem", fn_name="hello")

while 1:
     time.sleep(10)