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Building Real-Time Systems with RTOS: Achieving Deterministic Low-Latency Performance
🔹 Understanding Real-Time Systems Real-time systems are not just about running fast — they are about running predictably. In a typical computer, slight timing variations are acceptable. But in real-time applications — like industrial automation, medical equipment, or autonomous vehicles — a delay of even a few microseconds can lead to catastrophic consequences.A real-time…
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Optimizing Context Switches in the Linux Kernel: Hidden Performance Leverage
1. What Context Switching Really Costs Every time the kernel performs a context switch — moving execution from one thread to another — the CPU flushes registers, updates the program counter, and reloads process metadata. This is not “free multitasking.” It burns thousands of CPU cycles.When the switch rate spikes, cache locality is destroyed…