def __init__(self, pid, monitor_id, logger):
        BaseReader.__init__(self, pid, monitor_id, logger, "/proc/%ld/stat")
        # Need the number of jiffies_per_sec for this server to calculate some times.
        self._jiffies_per_sec = os.sysconf(os.sysconf_names['SC_CLK_TCK'])
        # The when this machine was last booted up.  This is required to calculate the process uptime.
        self._boot_time_ms = None
Initializes the reader.
dataset/ETHPy150Open scalyr/scalyr-agent-2/scalyr_agent/builtin_monitors/linux_process_metrics.py/StatReader.__init__