sleep             106 kernel/console.c       sleep();
sleep              98 kernel/defs.h  void            sleep(void);
sleep             136 kernel/log.c         sleep();
sleep             142 kernel/log.c         sleep();
sleep             255 kernel/log.c         sleep();
sleep              92 kernel/pipe.c        sleep();
sleep             126 kernel/pipe.c      sleep();
sleep             416 kernel/proc.c      sleep();
sleep              28 kernel/sleeplock.c     sleep();
sleep              85 kernel/sysproc.c     sleep();
sleep              91 kernel/uart.c        sleep();
sleep             234 kernel/virtio_disk.c     sleep();
sleep             290 kernel/virtio_disk.c     sleep();