7 articles tagged Operating Systems.
For most of human history, keeping track of dates was relatively straightforward. The sun came up; the sun went down.
Read article: The Year 2038 Problem: When Computers Discover Time Is HardHave you ever run snoop on Solaris or tcpdump on Linux or AIX and discovered that these tools cannot capture IP-based communication that occurs between two processes on the same machine? Or, Wireshark (formerly, Ethereal) on Windows? Only to discover the same limitation?
Read article: Capturing Network Communication Between Two Processes On the Same Machine…This article expands on the previous Virtual Memory post by exploring Resident Set Size growth while running a Java program that will consume all available Java Heap memory. Four different JVM implementations are used to compare results of these experiments. These JVMs come from two different…
Read article: JVM process Virtual Memory Usage (Resident Set Size) On A Linux 2.6.25 KernelIt has been a couple of weeks since the last article was published. Recently, I had to dig into Virtual Memory on AIX to work through some issues. I realized there were several details I needed to explore further to understand Virtual Memory implementations. In particular, the implementation…
Read article: Virtual Memory — LinuxI was recently asked if there was a way to generate a Thread Dump from a JVM running as a Windows Service. It occured to me that I had a similar issue during my Masters Project when I was trying to generate a thread dump from a Cygwin xterm; Googling at the time turned up no good way of accomplishing the task. But, I knew that you could use the Java Debugger that ships with the Sun JDK, jdb, to generate a thread dump of all non-System Threads in a JVM. I posed this as a solution to generating Thread Dumps from a JVM running as a Windows Service.
Read article: Generating Thread Dumps from a Sun or IBM JVM Running As A Windows ServiceIT Professionals face an up hill battle in the realm of performance tuning. First, management must be convinced that time needs to be set aside for it. Next, the skill sets to successfully move through the performance tuning life cycle must be present. Then, the tools to effectively identify issues…
Read article: Performance Tuning In IndustryI’m reading the book Linux Device Drivers to get up to speed on writing Linux modules; I’ll be using this for an upcoming project, if all goes according to plan. This isn’t much, but if you need to get the most basic of kernel modules built, this is what you need to do.
Read article: Linux Kernel Modules
