callrcu
Call RCU (Read-Copy-Update) is a synchronization mechanism used in operating systems and software to manage concurrent access to shared data structures. It is particularly useful in environments where read operations are much more frequent than write operations. The primary goal of RCU is to allow readers to access shared data without locking, thereby minimizing contention and improving performance.
RCU operates by allowing readers to access data without acquiring locks, which can be a significant performance
The key components of RCU include:
- Read-Side Critical Sections (RCU Read-Side Critical Sections): These are sections of code where readers access shared
- Grace Periods: A grace period is the time interval during which all existing RCU read-side critical
- Callbacks: These are functions that are scheduled to run after a grace period, allowing writers to
RCU is widely used in the Linux kernel and other high-performance systems due to its low overhead