2015

Virtual Memory - Part 1

The posting on this subject is going to be in multiple parts series. It is going to difficult to put everything in one post given the broad nature of the subject.

7 min read
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2014

Signal code in FreeBSD

Signals are a limited form of inter-process communication used in Unix, Unix-like, and other POSIX-compliant operating systems. A signal is an asynchronous notification sent to a process or to a specific thread within the same process in order to notify it of an event that occurred. Signals have been around since the 1970s Bell Labs Unix and have been more recently specified in the POSIX standard.

12 min read

Fork - FreeBSD

In computing, particularly in the context of the Unix operating system and its workalikes, fork is an operation whereby a process creates a copy of itself. It is usually a system call, implemented in the kernel. Fork is the primary (and historically, only) method of process creation on Unix-like operating systems.

6 min read

System Call

In computing, a system call is how a program requests a service from an operating system’s kernel. This may include hardware related services (e.g. accessing the hard disk), creating and executing new processes, and communicating with integral kernel services (like scheduling). System calls provide an essential interface between a process and the operating system.

4 min read

Context Switch

The scope of this post is limited to the study of context switches in various communication and synchronization primitives in distributed systems mainly focus on the following:

5 min read
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2013

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