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possible error in test_perf.py test (or in my setup..?) #3430

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possible error in test_perf.py test (or in my setup..?)#3430
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continuous integrationneed investigation
@axodentally

Description

@axodentally
axodentally
opened on Feb 10, 2026

When trying to build glances, the test_perf.py test fails every time with this error:

Details 
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
            glances_stats.update()
            # interrupts_gauge should always increase
            interrupts_gauge = glances_stats.get_plugin('cpu').get_raw().get('interrupts_gauge')
            if interrupts_gauge is not None:
                if interrupts_gauge == previous_interrupts_gauge:
                    from_cache += 1
                else:
                    from_update += 1
                    previous_interrupts_gauge = interrupts_gauge
            counter += 1
        print(f"{counter} iterations. From cache: {from_cache} | From update: {from_update}")
        assert counter > test_duration
        assert from_update < from_cache
        assert from_cache >= test_duration * 2
>       assert from_update >= (test_duration / 2) - 1
E       assert 3 >= ((12 / 2) - 1)

tests/test_perf.py:40: AssertionError
        from_cache = 0
        from_update = 0
        previous_interrupts_gauge = None
        while not perf_timer.finished():
            glances_stats.update()
            # interrupts_gauge should always increase
            interrupts_gauge = glances_stats.get_plugin('cpu').get_raw().get('interrupts_gauge')
            if interrupts_gauge is not None:
                if interrupts_gauge == previous_interrupts_gauge:
                    from_cache += 1
                else:
                    from_update += 1
                    previous_interrupts_gauge = interrupts_gauge
            counter += 1
        print(f"{counter} iterations. From cache: {from_cache} | From update: {from_update}")
        assert counter > test_duration
        assert from_update < from_cache
        assert from_cache >= test_duration * 2
>       assert from_update >= (test_duration / 2) - 1
E       assert 3 >= ((12 / 2) - 1)

tests/test_perf.py:40: AssertionError
------------------------------ Captured log setup ------------------------------
INFO     root:config.py:177 Read configuration file './conf/glances.conf'
INFO     root:__init__.py:231 Followings processes stats wil not be displayed: cpu_num
----------------------------- Captured stdout call -----------------------------
69 iterations. From cache: 62 | From update: 3
------------------------------ Captured log call -------------------------------
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2146304, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2150400, 196608, 2146304, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [3186688, 15609856, 3186688, 15609856, 1]
INFO     root:processes.py:777 *** Sort by cpu_times called <class 'list'> [196608, 2158592, 196608, 2150400, 1]
=============================== warnings summary ===============================
tests/test_core.py: 71 warnings
  /nix/store/slhpx9glq7vl99bwi93bgrhn3syv98s1-python3-3.13.11/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (p>
    self.pid = os.fork()

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================== short test summary info ============================
FAILED tests/test_api.py::test_glances_api_plugin_network - assert 0 > 0
FAILED tests/test_perf.py::test_perf_update - assert 3 >= ((12 / 2) - 1)
===== 2 failed, 377 passed, 9 deselected, 71 warnings in 79.49s (0:01:19) ======

i don't get the from_update assertion here, that needs to be bigger that (12 / 2) - 1 and is always 3 in my case. I do not know if this is an error in the test or in my build environment, so any help is appreciated!

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