ImportError: dynamic module does not define module export function (PyInit_uftrace_python)

[whiteyn]

Hello, we installed uftrace in ubuntu20.04 to trace python, and the result was an error, as shown below:

(torch_pg) root@testpc115159:/mnt/test# uftrace -e record ./simple.py
Traceback (most recent call last):
  File "/root/anaconda3/envs/torch_pg/lib/python3.9/runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/root/anaconda3/envs/torch_pg/lib/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/uftrace/uftrace.py", line 26, in <module>
    import uftrace_python
ImportError: dynamic module does not define module export function (PyInit_uftrace_python)
WARN: child terminated by signal: 11: Segmentation fault

Is there any solution for this? Thank you very much

[honggyukim]

Hi @whiteyn, could you show us the following info?

$ uftrace --version

$ cat simple.py

[whiteyn]

Hi @whiteyn, could you show us the following info?

$ uftrace --version

uftrace v0.17-5-g290c ( x86_64 dwarf python2 luajit tui perf sched dynamic

$ cat simple.py

#!/root/anaconda3/envs/***/bin/python

import torch
import torch.nn as nn
device =torch.device("cuda:3")
linear4 = nn.Linear(256, 128, bias=True)
input4=torch.randn(20,256)
linear4=linear4.to(device)
input4=input4.to(device)

outputs = linear4(input4)

[namhyung]

Hello, sorry for the late reply. It doesn't seem to find the uftrace python module (uftrace_python.so).

  File "/usr/local/lib/uftrace/uftrace.py", line 26, in <module>
    import uftrace_python
ImportError: dynamic module does not define module export function (PyInit_uftrace_python)
WARN: child terminated by signal: 11: Segmentation fault

I'm curious why it has the uftrace.py in that directory. How did you configure and install uftrace? Have you manually copied some files?