Mostafa Youssef

@MostafaY

CS Student | Full Stack Software Engineer | Competitive programmer | 3x ECPC finalist

EgyptJoined July 2024

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Software Engineer with a Bachelor’s in Computer Science. Competitive programmer with top 10% on leetcode.

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Working as a software engineer

Mostafa Youssef's blogs

Mostafa Elsawymostafaelsawy.hashnode.dev8 posts

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Recently published

mostafaelsawy.hashnode.dev

[8] Understanding Swap Space and Page Replacement Policies

In modern computing, we often assume that each process's address space is small enough to fit entirely in physical memory. However, this assumption is far from reality. As we move towards systems that support multiple large, concurrently running proc...

Oct 13, 202415 min read

mostafaelsawy.hashnode.dev

[7] Understanding Paging in Computer Systems

As we discussed in segmentation, we fixed the problem by dividing memory into variable-sized pieces. Unfortunately, this solution has its own issues. When you split space into variable-sized chunks, it can become fragmented, making allocation harder ...

Oct 5, 202422 min read

mostafaelsawy.hashnode.dev

[6] Understanding Segmentation in Computer Systems

As you can see, even though the space between the stack and heap isn't used by the process, it still takes up physical memory when we move the whole address space to physical memory. This makes using a base and bounds register pair to virtualize memo...

Sep 27, 202415 min read

mostafaelsawy.hashnode.dev

[5] Memory API

Types of Memory Stack Memory Allocations and deallocations are managed implicitly by the compiler, also known as automatic memory. Declaring memory on the stack in C is simple. For example, if you need space for an integer called x in a function f...

Sep 21, 20248 min read

mostafaelsawy.hashnode.dev

[4] Address Space & Address Translation

Back in the day, early machines didn't really offer much in terms of user-friendly features. Basically, the physical memory of the machine looked something like this: The OS was a set of routines (like a library) that stayed in memory (starting at p...

Sep 21, 202411 min read

Mostafa Youssef

About

Available for

Mostafa Youssef's blogs

Recently published

[8] Understanding Swap Space and Page Replacement Policies

[7] Understanding Paging in Computer Systems

[6] Understanding Segmentation in Computer Systems

[5] Memory API

[4] Address Space & Address Translation

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Mostafa Youssef

About

Available for

Mostafa Youssef's blogs

Recently published

[8] Understanding Swap Space and Page Replacement Policies

[7] Understanding Paging in Computer Systems

[6] Understanding Segmentation in Computer Systems

[5] Memory API

[4] Address Space & Address Translation