btrace t844450 844450 test_mutex t844449 844449 test_mutex t844450->t844449 futex 486.3ms, 182x cat_timer [timer] t844450->cat_timer sleep 289.3ms, 368x t844447 844447 test_mutex t844447->t844450 futex 489.8ms, 183x t844447->cat_timer sleep 285.7ms, 364x t844448 844448 test_mutex t844448->t844447 futex 486.0ms, 182x t844448->cat_timer sleep 287.5ms, 366x t844449->t844448 futex 489.8ms, 183x t844449->cat_timer sleep 287.1ms, 364x