MrComputerScience.com
Blog For Marketing And Tech Nerds
Systems programming is where software gets close to the hardware, and that is part of what makes it so fascinating. In this category, I write about memory management, concurrency, CPU behavior, operating systems, performance engineering, and the low-level details that shape how computers actually run.
This is the side of computer science where small implementation decisions can have huge performance consequences. If you have ever wondered why cache locality matters, why multithreaded code is difficult, or how operating systems manage processes safely, this category is for you.
Browse the articles below to explore systems programming from the inside out.
Every process on a modern operating system runs in its own virtual address space. The OS and CPU hardware cooperate to translate virtual addresses to physical RAM transparently, isolating processes …
Continue Reading about How Does the OS Manage Virtual Memory and Page Tables? →
False sharing occurs when two threads on different CPU cores modify different variables that happen to sit on the same cache line. The hardware sees writes to the same cache line from two cores and …
Continue Reading about Why Does False Sharing Destroy Multithreaded Performance? →
Out-of-order execution lets a CPU execute instructions in a different sequence than the program specifies, filling pipeline stalls with independent work. When one instruction waits for data from …
Continue Reading about What Happens Inside the CPU When Out-of-Order Execution Runs? →
