ch7.mutex - compilaion failed about pyopencl-in-action HOT 4 CLOSED

Using CPU: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
On platform: Intel(R) CPU Runtime for OpenCL(TM) Applications (OpenCL 2.1 LINUX)

/usr/lib/python3.7/site-packages/pyopencl/cffi_cl.py:1517: CompilerWarning: From-source build succeeded, but resulted in non-empty logs:
Build on <pyopencl.Device 'Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz' on 'Intel(R) CPU Runtime for OpenCL(TM) Applications' at 0x5637977efe08> succeeded, but said:

Compilation started
Compilation done
Linking started
Linking done
Device build started
Device build done
Kernel <mutex> was not vectorized
Done.
  warn(text, CompilerWarning)
Sum: [4]

<pyopencl.Platform 'Intel(R) OpenCL HD Graphics' at 0x556d29d9a370>
<pyopencl.Platform 'Experimental OpenCL 2.1 CPU Only Platform' at 0x556d299366d0>

(cl) ~/work/p1/pyopencl-in-action$ python -m "ch11.string_search"
Using GPU: Intel(R) Gen9 HD Graphics NEO
On platform: Intel(R) OpenCL HD Graphics (OpenCL 2.1)

Traceback (most recent call last):
  File "/home/ubuntu/anaconda3/envs/cl/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/ubuntu/anaconda3/envs/cl/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/ubuntu/work/p1/pyopencl-in-action/ch11/string_search.py", line 84, in <module>
    with open(TEXT_FILE, 'r') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'kafka.txt'

(cl) ~/work/p1/pyopencl-in-action$ python -m "ch11.string_search"
Using GPU: Intel(R) Gen9 HD Graphics NEO
On platform: Intel(R) OpenCL HD Graphics (OpenCL 2.1)

Number of occurrences of 'that': 330
Number of occurrences of 'with': 237
Number of occurrences of 'have': 110
Number of occurrences of 'from': 116