Here’s an interesting bit I ran into few days ago. I got curious how is that less (or more) can read file contents from standard input and yet it is able to process input that comes from user. Both of them come from standard input, yet these are quiet heterogeneous streams of information. So, how […]
Recently I looked for a solution to this little problem. how do you, programmatically, delete a symbolic link and a file that it points to? One problem that you should take care of when tackling this problem, is that symbolic link can point to a symbolic link. Then symbolic link should also point to symbolic […]
Doing file I/O of any kind in Python is really easy. You can start with plain open() and friends, working with Python’s file objects. by the way, Python’s open() resembles C‘s fopen() so closely that I can’t stop thinking that open() may be based on fopen(). When its not enough, you can always upgrade to […]
There is one nice thing in looking for a new job. That is, you meet lots of new people and have a chance to learn from them. For example in one of the companies I was asked about something called anti-debugging. I didn’t have a clue what that is and had to ask for an […]
When considering ways to spread interrupts from one device among multiple cores, I can’t not to mention MSI-X. The thing is that MSI-X is actually the right way to do the job. Interrupt affinity, which I discussed here and here, has a fundamental problem. That is inevitable CPU cache misses. To emphasise this, think about […]
One of the features of x86 architecture is ability to spread interrupts evenly among multiple cores. Benefits of such configuration seems to be obvious. Interrupts consume CPU time and by spreading them on all cores we avoid bottle-necks. I’ve written an article explaining this mechanism in greater detail. Yet let me remind you how it […]
Table of contents Introduction to the series Introduction to the article Way of working with Bazaar Demo setup description Directory and user configuration The basics Creating a project Checking-out the project Adding files to the project Committing files Few words about revision numbers in Bazaar Local commits or offline commits Committing local commits to remote […]
When git appeared for the first time, I was convinced that I don’t need it. It seemed that git is good for large and distributed projects, like kernel. While my own needs where much more modest – manage a project with couple of dozen files and perhaps a couple of contributors at most. Couple of […]
What is the most frequently used piece of software on your computer? Here’s one program that holds one of the highest place in my list of most frequently used programs. I am talking about… bash. In case you don’t know, this is the program behind large portion of the Linux command line. It is the […]
Table of contents Introduction to the series Introduction to the article Way of working with Bazaar Demo setup description Directory and user configuration The basics Creating a project Checking-out the project Adding files to the project Committing files Few words about revision numbers in Bazaar Local commits or offline commits Committing local commits to remote […]