Measuring Memory Subsystem Performance in C++

2023/08/01

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The article from Johnny's Software Lab explores the topic of measuring memory subsystem performance in C++. It discusses cache miss types and how to optimize them, as well as the difference between throughput bound and latency bound loops. The article also introduces the concept of Top-Down Microarchitectural Analysis (TDMA) and its use in identifying hardware inefficiencies in source code functions. The author mentions tools like Intel's VTUNE profiler, PMU-tools, and ARM MAP that support TDMA. The article concludes with a discussion on the Roofline Model and arithmetic intensity, highlighting the importance of optimizing the ratio between operations and memory access. This article provides valuable insights for developers looking to improve the performance of their C++ programs.