Featured
How to read RISC-V mtime without an infinite loop
The RISC-V mtime register is a 64-bit timer. For 32-bit RISC-V profiles, there is an interesting challenge involved in simply reading it. We cannot read...
Dude, where's my code?
From time to time, I have experienced what seems like vanishing code. I write out the source code, I think it is right, but then...
Measurement fallacies
One of the most important texts on creating performant software remains Michael Abrash’s Graphics Programming Black Book. Around 30 years after publishing, it still speaks...
Perfect hashing
Perfect hashing is often overlooked as a way to organize data in a hard real-time, embedded system. This might be because its application is quite...
Tail-call optimization (1)
Tail-call optimization has some features that make it particularly interesting to discuss. Most software developers have heard of tail-call optimization, do not really understand the...
Why hard real-time is hard
Hard real-time means software running in a system that only functions correctly if results are delivered before hard deadlines. This system is a combination of...
Why hard real-time is easy
Hard real-time means software running in a system that only functions correctly if results are delivered before hard deadlines. In a hard real-time system, every...
Single-Path Code (3)
Single-path code, or branchless code, has been an important development in performance computing. It turns out to be even more interesting in the domain of...
Single-Path Code (2)
Single-path code, or branchless code, has been an important development in performance computing. It turns out to be even more interesting in the domain of...
Single-Path Code (1)
Single-path code, or branchless code, has been an important development in performance computing. The hardware acceleration features of modern processors are optimized for code without...
Constant Joy (4)
The const keyword in C is a useful tool with different meanings in different contexts. In my first three articles, I explained these different meanings...
Constant Joy (3)
The const keyword in C is a useful tool with different meanings in different contexts. In my first two articles, I looked at const applied...
Constant Joy (2)
The const keyword in C is a useful tool with different meanings in different contexts. In my first article, I looked at const applied to...
