pthreads
pthreads stands for POSIX Threads which is the de facto standard threading related API that operating systems need to support for thread managements. Almost ...
Recent posts
Threads and Concurrency
A traditional process has a single execution context that can only execute at one CPU at a given point of time. If a process can have multiple execution cont...
Processes
Definition A process is an instance of an executing program. It is also referred to as a “task” or “job”.
Operating System Overview
Definition An operating system, or OS, is just a software that abstracts and arbitrates the underlying hardware components in computer systems.
Redlock: Distributed Lock Manager with Redis
A couple years ago, I discovered an issue caused by a race condition that occured in the backend application I was maintaining. So I implemented a simple dis...
Liskov Substitution Principle and Circle-ellipse Problem
The circle-ellipse problem, or square–rectangle problem, illustrates a limitation of OOP (object-oriented programming). Specifically, it violates the Liskov ...
Python Descriptors
A descriptor in Python is a class attribute which defines any of the special methods: __get__(self, obj, owner=None) -> value __set__(self, obj, valu...
Timsort
Most programmers would be familiar with some fundamental sorting algorithms such as bubble sort, selection sort, insertion sort, and merge sort. Then which a...
How Kubelet Garbage Collection Fails (The Outbreak of Evicted Pods)
Since I’ve bootstrapped a K8s cluster and been administrating all by myself, I’ve encountered many problems and I have had to solve them on my own. One chall...
Peformance Comparison between Flask and Sanic
Flask and Sanic Flask is one of the most popular micro web frameworks written in Python and I love using it for developing a wide range of web services becau...