We investigate how to make faster hash maps, trees, linked lists and vector of pointers by changing their data layout.
All posts tagged memory wall
Measuring Memory Subsystem Performance
In this post we introduce a few most common tools used for memory subsystem performance debugging.
Software Performance and Class Layout
We investigate the secret connection between class layout and software performance. And of course, how to make your software faster.
Decreasing the Number of Memory Accesses 1/2
In this post, we are investigating a few common ways to decrease the number of memory accesses in your program.
Frugal Programming: Saving Memory Subsystem Bandwidth
We investigate techniques of frugal programming: how to program so you don’t waste the limited memory resources in your computer system.
For Software Performance, the Way Data is Accessed Matters!
In our experiments with the memory access pattern, we have seen that good data locality is a key to good software performance. Accessing memory sequentially and splitting the data set into small-sized pieces which are processed individually improves data locality and software speed. In this post, we will present a few techniques to improve the…
The memory subsystem from the viewpoint of software: how memory subsystem affects software performance 2/3
We continue the investigation from the previous post, trying to measure how the memory subsystem affects software performance. We write small programs (kernels) to quantify the effects of cache line, memory latency, TLB cache, cache conflicts, vectorization and branch prediction.
The memory subsystem from the viewpoint of software: how memory subsystem affects software performance 1/3
In this post we investigate the memory subsystem of a desktop, server and embedded system from the software viewpoint. We use small kernels to illustrate various aspects of the memory subsystem and how it effects performance and runtime.
Instruction-level parallelism in practice: speeding up memory-bound programs with low ILP
We talk about instruction level parallelism: what instruction-level parallelism is, why is it important for your code’s performance and how you can add instruction-level parallelism to improve the performance of your memory-bound program.
Memory consumption, dataset size and performance: how does it all relate?
We investigate how memory consumption, dataset size and software performance correlate…