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Go Memory Management - Povilas Versockas
Deep dive into Go Memory Management. This post gives an overview of Physical memory, Virtual memory, how Operating System interacts with hardware to run apllications.
go  memory  manager  elf  c  5* 
august 2018 by ianweatherhogg
A crash course in memory management – Mozilla Hacks – the Web developer blog
This is the first article in a 3-part series of code cartoons that explore SharedArrayBuffers in JavaScript and how they are used. To understand why ArrayBuffer and SharedArrayBuffer were added ...
javascript  web  assembly  memory  manager 
february 2018 by ianweatherhogg
Understanding the C/C++ memory model | Software is Crap
I know that a lot of people struggle with understanding the memory model introduced in C11/C++11. In a recent conversation I was alerted to the existence of this blog post, which while correct (by my understanding) is in my opinion aimed at those who already have a good understanding of some of the underlying concepts.…
c  cpp  memory  model 
january 2018 by ianweatherhogg
JVM memory model - Coding Geek
I’ll present the heap, the stack, the constant pool and more. Those memory areas are designed to store the data used by a program or by the JVM itself.
jvm  memory  model 
september 2017 by ianweatherhogg
Java Garbage Collection 101 – Polyglot Programmer's Blog
Do you have an interview tomorrow and want to refresh your knowledge on garbage collection? Or maybe you are new to this topic and just want to start somewhere? Either way, this is a place for you. In this post, I will go from fundamentals to the practical implementations and will introduce you to several GC buzzwords.
jvm  java  memory  model  garbagecollection 
february 2016 by ianweatherhogg
Multithreading 101 – Polyglot Programmer's Blog
This post will explain the basics laying behind multithreading in general and how those basics relate to real-world programming languages (Java in this case). This is the foundation which we will build upon in later posts, where we will talk about advanced multithreading and concurrency topics.
java  concurrency  multi  thread  lock  volatile  memory  model  mutex  4* 
february 2016 by ianweatherhogg
How to Memorize a Shuffled Deck of Cards in Less Than 60 Seconds (Plus: $10,000 Challenge) | The Blog of Author Tim Ferriss
(Photo credit: Jystyn) To become a Grand Master of Memory--fewer than 100 in the world can claim that title--you need to satisfy each of the following in competitions approved by the World Memory Sport Council: • Memorize the order of 10 decks of cards in 60 minutes.
learn  memory 
october 2015 by ianweatherhogg
How to Detect Java Memory Leaks | Toptal
While Java’s garbage collector does its best, even the most experienced programmers fall prey to memory leaks. Learn why they occur—and how to fix them.
java  memory  leak  model  garbagecollection  jvm  remote  connection  host  5*  visual  vm 
september 2015 by ianweatherhogg
What a C programmer should know about memory – Marek Vavrusa
In 2007, Ulrich Drepper wrote a “What every programmer should know about memory”. Yes, it's a wee bit long-winded, but it's worth its salt. Many years and “every programmer should know about” articles later, the concept of virtual memory is still elusive to many, as if it was ... a kind of magic. Awww, I couldn't resist the reference.
c  memory  stack  heap  compareandset  5* 
march 2015 by ianweatherhogg
What's new in CPUs since the 80s and how does it affect programmers?
This is a response to the following question from David Albert: My mental model of CPUs is stuck in the 1980s: basically boxes that do arithmetic, …
cpu  processor  architecture  clang  assembly  language  memory  concurrency  lock  5* 
january 2015 by ianweatherhogg
Recursion: Dream Within a Dream - Gustavo Duarte
Recursion is magic, but it suffers from the most awkward introduction in
programming books. They’ll show you a recursive factorial …
c  recursion  stack  memory  cache  5* 
december 2014 by ianweatherhogg
Epilogues, Canaries, and Buffer Overflows - Gustavo Duarte
Last week we looked at how the stack works and how stack frames are
built during function prologues. Now it’s time to look at the inverse …
linux  kernel  buffer  c  assembly  language  memory  5* 
december 2014 by ianweatherhogg
Page Cache, the Affair Between Memory and Files - Gustavo Duarte
Previously we looked at how the kernel manages virtual memory
for a user process, but files and I/O were left out. This post covers
the important and …
linux  kernel  page  cache  memory  file  5* 
december 2014 by ianweatherhogg
How the Kernel Manages Your Memory - Gustavo Duarte
After examining the virtual address layout of a process, we turn to the kernel and its mechanisms for managing user memory. Here is gonzo again: …
linux  kernel  memory  manager  page  table  virtual  5* 
december 2014 by ianweatherhogg
Anatomy of a Program in Memory - Gustavo Duarte
Memory management is the heart of operating systems; it is crucial for both programming and system administration. In the next few posts I’ll …
linux  memory  page  map  security  kernel  5*  stack  frame 
december 2014 by ianweatherhogg
Getting Physical With Memory - Gustavo Duarte
When trying to understand complex systems, you can often learn a lot by stripping away abstractions and looking at their lowest levels. In that …
cpu  memory  linux  kernel  5* 
december 2014 by ianweatherhogg
Memory Translation and Segmentation - Gustavo Duarte
This post is the first in a series about memory and protection in Intel-compatible (x86) computers, going further down the path of how kernels work …
linux  kernel  memory  cpu  page  5* 
december 2014 by ianweatherhogg
The Kernel Boot Process - Gustavo Duarte
The previous post explained how computers boot up right up to the point where the boot loader, after stuffing the kernel image into memory, is about …
linux  kernel  boot  process  disk  image  bios  memory  map  5* 
december 2014 by ianweatherhogg
How Computers Boot Up - Gustavo Duarte
The previous post described motherboards and the memory map in
Intel computers to set the scene for the initial phases of boot. Booting is an …
linux  boot  bios  memory  map  5* 
december 2014 by ianweatherhogg
Motherboard Chipsets and the Memory Map - Gustavo Duarte
I’m going to write a few posts about computer internals with the goal of
explaining how modern kernels work. I hope to make them useful to …
linux  computer  architecture  memory  map  ram  5* 
december 2014 by ianweatherhogg
Blog Archive - Gustavo Duarte
Blog Archive 2014 What Does an Idle CPU Do?
Oct 29 2014 posted in Internals, Linux, Software Illustrated When Does Your OS Run?
Oct 28 2014 posted …
c  linux  cpu  architecture  memory  lowlevel  hackage  stack  recursion  tail  call  optimization  5* 
october 2014 by ianweatherhogg
Getting Started with LXC on an Ubuntu 13.04 VPS | DigitalOcean
LXC, or Linux Containers, is a system built upon a number of features included in modern Linux kernels that allows for creation and management of many virtualized Linux systems on a single parent host system. However, unlike some virtualization soluti
digital  ocean  lxc  helloworld  configuration  c  group  ubuntu  template  ip  table  nginx  4*  memory 
october 2014 by ianweatherhogg
google/jimfs · GitHub
jimfs - An in-memory file system for Java 7+
java  github  memory  file  system 
september 2014 by ianweatherhogg
Tracking down a memory leak in Ruby's EventMachine - Made of Bugs
At Stripe, we rely heavily on ruby and
EventMachine to power various internal and external
services. Over the last several months, we've known …
ruby  event  machine  memory  leak  debug  gdb  work  flow  c  ssl  certificate  5* 
may 2014 by ianweatherhogg
Memory inside Linux containers | Fabio Kung
Or why don't free and top work in a Linux container? Lately at Heroku, we have been trying to find the best way to expose memory usage and limits inside Linux containers. It would be easy to do it in a vendor-specific way: most container specific metrics are available at the cgroup filesystem via /path/to/cgroup/memory.stat,…
heroku  linux  container  c  group  memory  profiling  proc  fuse  4*  lxc 
march 2014 by ianweatherhogg
An Introduction to Lock-Free Programming
Lock-free programming is a challenge, not just because of the complexity of the task itself, but because of how difficult it can be to penetrate the …
lock  free  algorithm  compareandset  memory  order  cpp  5* 
february 2014 by ianweatherhogg
An Overview of Memory Management in Rust - pcwalton
One of the key features of Rust that sets it apart from other new languages is that its memory management is manual—the programmer has explicit …
rust  c  memory  manager  4* 
january 2014 by ianweatherhogg
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