2012-09-23 10:43 (View Comments)Eric presents an example of a process which monitors itself for excessive CPU usage derived from PulseAudio source code.
2012-03-27 01:11 (View Comments)Today Eric talks about how to implement signal handlers properly and what pitfalls to look out for.
2012-03-27 00:25 (View Comments)Today Eric talks about signal handling basics.
2012-03-20 21:56 (View Comments)Today Eric presents various bits of information that the kernel manages for a process.
2011-11-11 22:37 (View Comments)Eric explains duplicating file descriptors.
2011-10-19 04:59 (View Comments)Eric explains Unix time concepts and how time related functionality is accessed from Ruby.
2011-09-24 02:28 (View Comments)We learn what pipes are and how they are realized in a Unix kernel.
2011-09-23 00:35 (View Comments)This article explains how hierarchical filesystems are organized and what utilities Ruby provides for access to directories and directory entries.
2011-09-23 00:21 (View Comments)This article presents the various types of meta data of a file which can be obtained from the kernel. We also learn how to access this information from Ruby.
2011-09-20 04:13 (View Comments)This article introduces basic methods used for doing IO and how they map to system calls.
2011-09-19 21:28 (View Comments)Class IO is at the core of Ruby's IO functionality. We also look at what types of buffers are active in an application and whether and how they are shared.
2011-09-17 03:33 (View Comments)This is an introduction to places where information about processes in a running Unix system can be found.
2011-09-17 03:32 (View Comments)Eric describes common strategies to reduce the number of system calls done. This does make sense since they come with an overhead.
2011-09-15 00:34 (View Comments)Explanation of the different functional layers involved in eventually getting the kernel to do something for us.
2011-09-15 00:34 (View Comments)POSIX filesystems are byte oriented and the abstraction is difficult to adhere for certain use cases.
2011-09-14 23:55 (View Comments)In this installment Eric explains basic features of the Unix hierarchical filesystem including virtual filesystems.
2011-09-14 23:30 (View Comments)Eric introduces fundamental concepts of the runtime architecture of a Unix system: processes and file descriptors.
2011-09-13 04:24 (View Comments)This is the first article in the series of our guest author Eric Wong about Unix systems programming (USP).
2011-09-13 01:29 (View Comments)