Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use mach_timebase_info method in pytest-benchmark

Best Python code snippet using pytest-benchmark

timing.py

Source:timing.py

...30    # From <mach/mach_time.h>31    KERN_SUCCESS = 032    libSystem = ctypes.CDLL('/usr/lib/libSystem.dylib', use_errno=True)33    mach_timebase_info = libSystem.mach_timebase_info34    class struct_mach_timebase_info(ctypes.Structure):35        _fields_ = [('numer', ctypes.c_uint32), ('denom', ctypes.c_uint32)]36    mach_timebase_info.argtypes = [ctypes.POINTER(struct_mach_timebase_info)]37    mach_ti = struct_mach_timebase_info()38    ret = mach_timebase_info(ctypes.byref(mach_ti))39    if ret != KERN_SUCCESS:40        raise Exception('Could not get mach_timebase_info, error: ' + str(ret))41    mach_absolute_time = libSystem.mach_absolute_time42    mach_absolute_time.restype = ctypes.c_uint6443    def _monotonic_time_nanos_darwin():44        return (mach_absolute_time() * mach_ti.numer) / mach_ti.denom45    monotonic_time_nanos = _monotonic_time_nanos_darwin46elif platform.system() == 'Windows':47    # From <Winbase.h>48    perf_frequency = ctypes.c_uint64()49    ctypes.windll.kernel32.QueryPerformanceFrequency(ctypes.byref(perf_frequency))50    def _monotonic_time_nanos_windows():51        perf_counter = ctypes.c_uint64()52        ctypes.windll.kernel32.QueryPerformanceCounter(ctypes.byref(perf_counter))...

_time.py

Source:_time.py

...32        mach_timebase_info = lib.mach_timebase_info33        mach_timebase_info.restype = None34        mach_timebase_info.argtypes = [ctypes.POINTER(mach_timebase_info_t)]35        self._timebase = mach_timebase_info_t()36        mach_timebase_info(self._timebase)37        self._mach_absolute_time = lib.mach_absolute_time38        self._mach_absolute_time.restype = ctypes.c_uint6439        self._mach_absolute_time.argtypes = []40        self._start = self._mach_absolute_time()41    def monotonic(self):42        elapsed = self._mach_absolute_time() - self._start43        timestamp = elapsed * self._timebase.numerator / self._timebase.denominator44        sec, nsec = divmod(timestamp, 10 ** 9)45        return sec + nsec * (10 ** -9)46class LinuxTime(object):47    CLOCK_MONOTONIC = 148    _byref = ctypes.byref49    _strerror = os.strerror50    _get_errno = ctypes.get_errno...

mach_time.py

Source:mach_time.py

...12mach_timebase_info = CDLL(None).mach_timebase_info13mach_timebase_info.restype = c_int14mach_timebase_info.argtypes = (POINTER(mach_timebase_info_data_t),)15_info = mach_timebase_info_data_t()16mach_timebase_info(pointer(_info))17assert time.get_clock_info('monotonic').implementation == 'mach_absolute_time()'18# reconstruct value of t0 in19# https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Python/pytime.c#L85520def pymonotonic_t0():21    t1 = time.monotonic()22    t2 = mach_absolute_time()23    t3 = time.monotonic()24    return t2 - int((t1+t3)/2 * 1e9 * _info.denom / _info.numer)25pymonotonic_t0 = int(np.array([pymonotonic_t0() for i in range(1000)], np.uint64).sum() / 1000 + .5)26def hostTimeToMonotonic(hostTime):27    return (hostTime - pymonotonic_t0) * _info.numer / _info.denom * 1e-928def monotonicToHostTime(monotonic):29    return int(monotonic * 1e9 * _info.denom / _info.numer) + pymonotonic_t030# partial derivatives...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.