Low-Level Lore

Low-Level Lore

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How Does the Memory Management Unit (MMU) Work with the Unix/Linux Kernel?
Understanding how your CPU's MMU collaborates with the Linux kernel to create process isolation, memory protection, and the illusion of infinite RAM.
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Mohit
Why You Can't Directly Move Data Between Two Memory Addresses in x86 Assembly and How to Do It
Understanding instruction encoding limitations and mastering efficient data movement techniques from single bytes to large blocks
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Mohit
Fork() and File Descriptors: The Unix Gotcha Every Developer Should Know
Understanding shared file offsets, buffer duplication, and race conditions that can silently break your applications
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Mohit
Storage Wars: Object vs Block vs File Systems Under the Hood
From file descriptors and inodes to REST APIs and eventual consistency—understanding what happens when your code hits storage
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Mohit

May 2025

How SSH Multiplexing Reuses Master Connections for Efficient Sessions
The hidden SSH optimisation that turns multiple terminal connections into shared channels over a single TCP socket—and why it matters for every…
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Mohit
The Linker's Detective Work: How Symbol Resolution Turns Code Fragments Into Running Programs
Understanding the intricate process that connects your function calls, variables, and libraries into a cohesive executable
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Mohit
Why Packet Data Not Need a Trailer/Footer While a Frame Needs It
Exploring the Clever Design Behind Frames Needing Trailers and Packets Going Without
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Mohit
Programming is Seductive
How the perfect control of code becomes an escape from the messiness of reality
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Mohit
Bit by Bit: Why Variable Sizes Shape Your Code
A Bit-Level Analysis of Type Specificity and Its Impact on Memory Allocation, CPU Register Utilization, and Runtime Performance in Systems Programming
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Mohit
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GRPO - Group Relative Policy Optimization: How DeepSeek Trains Reasoning Models
Discover how GRPO, an innovative reinforcement learning technique, enables efficient training of compact AI models that rival industry giants in…
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Mohit
From Text to Numbers: How Computers Convert Strings to Integers Under the Hood
An in-depth exploration of how computers transform textual representations of numbers into actual integers, with code examples in multiple languages and…
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Mohit
Improving PostgreSQL Snapshots Efficiency: Current Implementation, Challenges, and a Proposed Hybrid Design
Examine PostgreSQL's snapshot system, understand its performance limitations, and learn about a hybrid Commit Sequence Number (CSN) design that…
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Mohit
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