no way you can go for 24-hour being completely awake for 9 months. you can fall into semi-sleep (weird states of trippy semi-consciousness, people daydreaming with open eyes etc.) that gives slight rest to tormented body and mind. Heck, if I cannot sleep, even laying down and closing eyes helps in resting, without sleeping. But if we're talking about healthy normal person who is forced not to sleep, my estimate is in 5-7 days he would die. Tried by military many times, used as torture tool not only during WWII (now they moved to water boarding)