互斥问题背景下“切片”的意义

Question

“切片”在以下陈述中的含义是什么：

p0 tests lock (now, slice before actually setting lock)

作者试图显示此程序未满足互斥锁。 它来自http://www.mcs.csueastbay.edu/~billard/os/mutex.txt

感谢。

Answer 1

从上下文来看，我认为它意味着上下文切换（即当前点有 timeslice 边界）。因此，

p0 tests lock (now, slice before actually setting lock)
p1 tests lock (this makes p1 think it is still available)

装置

p0 tests lock
timeslice ends -- context switch to p1
p1 tests lock
...