We just looked at a shared memory model of concurrency: different threads could concurrently access the same memory locations. A shared memory model is commonly used in many …

Concurrency A version of the program that executes multiple tasks simultaneously Example: Our web server could execute multiple queries at the same time While one is waiting for I/O, …

What Is a Thread? What Is “Concurrency?” Two events are said to be concurrent if they occur within the same time interval. Two or more tasks executing over the same time interval are …

Due to the ability to have multiple threads, multiple processes, and multiple machines work together on a single problem, the notion of an application is changing. It used to be that: How …

This chapter has set up the problem of concurrency as if only one type of interaction occurs between threads, that of accessing shared variables and the need to support atomicity for …

Run a computation on all cores on 100K machines! Concurrency is Inevitable! Inconsistent replicas! What to Do? Handle one client at a time? How to enforce a consistent order? Based …

Concurrency between computation and input or output Concurrency between computation and user Concurrency between essentially independent activities that take place at same time …