use funclatency

[zxc199108]

/virtual/main.c:43:9: error: no member named 'atomic_increment' in 'struct avg_table_t'
avg.atomic_increment(lat, delta);
~~~ ^
/virtual/main.c:44:9: error: no member named 'atomic_increment' in 'struct avg_table_t'
avg.atomic_increment(cnt);
~~~ ^
/virtual/main.c:47:10: error: no member named 'atomic_increment' in 'struct dist_table_t'
dist.atomic_increment(bpf_log2l(delta));
~~~~ ^
3 errors generated.
Traceback (most recent call last):
File "funclatency.py", line 317, in
b = BPF(text=bpf_text)
File "/usr/lib/python3.6/site-packages/bcc/init.py", line 347, in init
raise Exception("Failed to compile BPF module %s" % (src_file or ""))
Exception: Failed to compile BPF module

[zxc199108]

python3 funclatency.py -p 7219 -u do_nanosleep

[chenhengqi]

You need to rebuild and install BCC.

[Zarak-Shah-ji]

How to rebuild BCC?

[bahamasbahamas]

After rebuilding and installing bcc, I received the same error when running funclatency.py in Pycharm.

/home/ubuntu/python35-setcap /home/ubuntu/bcc/tools/funclatency.py c:read 
/virtual/main.c:54:9: error: no member named 'atomic_increment' in 'struct avg_table_t'
    avg.atomic_increment(lat, delta);
    ~~~ ^
/virtual/main.c:55:9: error: no member named 'atomic_increment' in 'struct avg_table_t'
    avg.atomic_increment(cnt);
    ~~~ ^
/virtual/main.c:68:14: error: no member named 'atomic_increment' in 'struct dist_table_t'
        dist.atomic_increment(key);
        ~~~~ ^
3 errors generated.
Traceback (most recent call last):
  File "/home/ubuntu/bcc/tools/funclatency.py", line 345, in <module>
    b = BPF(text=bpf_text)
  File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 364, in __init__
    raise Exception("Failed to compile BPF module %s" % (src_file or "<text>"))
Exception: Failed to compile BPF module <text>

I used these commands to run funclatency.py as root in Pycharm:

cp /usr/bin/python3 ~/python35-setcap
sudo setcap 'cap_net_bind_service=+ep' ~/python35-setcap

If I start funclatency.py with sudo funclatency-bpfcc c: read from the terminal, it works.

[Cycatz]

For someone who encountered the same error: #3911 (comment) may help