Class _MemoryWatchdog

Lib/test/support/__init__.py:1238–1266

An object which periodically watches the process' memory consumption and prints it out.

class _MemoryWatchdog:
    """An object which periodically watches the process' memory consumption
    and prints it out.
    """

    def __init__(self):
        self.procfile = '/proc/{pid}/statm'.format(pid=os.getpid())
        self.started = False

    def start(self):
        try:
            f = open(self.procfile, 'r')
        except OSError as e:
            logging.getLogger(__name__).warning('/proc not available for stats: %s', e, exc_info=e)
            sys.stderr.flush()
            return

        import subprocess
        with f:
            watchdog_script = findfile("memory_watchdog.py")
            self.mem_watchdog = subprocess.Popen([sys.executable, watchdog_script],
                                                 stdin=f,
                                                 stderr=subprocess.DEVNULL)
        self.started = True

    def stop(self):
        if self.started:
            self.mem_watchdog.terminate()
            self.mem_watchdog.wait()


def bigmemtest(size, memuse, dry_run=True):