Multithreading and the Memory Subsystem

Multithreading and the Memory Subsystem

In this post we investigate how the memory subsystem behaves in an environment where several threads compete for memory subsystem resources. We also investigate techniques to improve the performance of multithreaded programs – programs that split the workload onto several CPU cores so that they finish faster.

Decreasing the Number of Memory Accesses: The Compiler’s Secret Life 2/2

Decreasing the Number of Memory Accesses: The Compiler’s Secret Life 2/2

We investigate memory loads and stores that the compiler inserts for us without our knowledge: “the compiler’s secret life”. We show that these loads and stores, although necessary for the compiler are not necessary for the correct functioning of our program. And finally, we explain how you can improve the performance of your program by removing them.