public static function __pre_test_run($test_run_request)
 {
     if (self::$individual_monitoring == false) {
         return;
     }
     // We're going to run the test for the first time (but will probably repeat it several times).
     self::$test_run_try_number = 0;
     self::$individual_test_run_request = clone $test_run_request;
     // Just to pad in some idling into the run process
     sleep(self::$sensor_monitoring_frequency);
     self::save_log_offsets('pre-test');
     self::$test_run_timer = time();
 }