Best Python code snippet using pytest-benchmark
realtime.py
Source: realtime.py
...23CLOCK_BOOTTIME = 724if platform.system() != 'Darwin' and hasattr(libc, 'clock_gettime'):25 c_clock_gettime = libc.clock_gettime26 tlocal = threading.local()27 def clock_gettime(clk_id):28 if not hasattr(tlocal, 'ts'):29 tlocal.ts = ffi.new('struct timespec *')30 ts = tlocal.ts31 r = c_clock_gettime(clk_id, ts)32 if r != 0:33 raise OSError("clock_gettime")34 return ts.tv_sec + ts.tv_nsec * 1e-935else:36 # hack. only for OS X < 10.1237 def clock_gettime(clk_id):38 return time.time()39def monotonic_time():40 return clock_gettime(CLOCK_MONOTONIC_RAW)41def sec_since_boot():42 return clock_gettime(CLOCK_BOOTTIME)43def set_realtime_priority(level):44 if os.getuid() != 0:45 print("not setting priority, not root")46 return47 if platform.machine() == "x86_64":48 NR_gettid = 18649 elif platform.machine() == "aarch64":50 NR_gettid = 17851 else:52 raise NotImplementedError53 tid = libc.syscall(NR_gettid)54 return subprocess.call(['chrt', '-f', '-p', str(level), str(tid)])55class Ratekeeper(object):56 def __init__(self, rate, print_delay_threshold=0.):...
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