问题4生成不同的中断频率，运行结果会不同，仍然存在竞态。问题5程序test-and-set.s.var mutex.var count.main.top.acquire# 获取锁mov$1, %axxchg %ax, mutex# atomic swap of 1 and mutextest $0, %ax# if we get 0 back: lock is free!jne.acquire#