Published on : May 11, 2019 by Ruben Roy
Preface:
As a System Administrator, server uptime has much importance. The servers must be running as long as possible. While keeping this server uptime consistent, a System Administrator should also have to apply the patches and to maintain the reliability. If the patch is done for the kernel there may be a chance to reboot the […]
Published on : May 7, 2019 by Abhilash R
Preface:
NMI Watchdog is something you would have heard of. NMI or Non Maskable Interrupt, is a type of interrupt which the CPU cores canʼt ignore. Other type of interrupts, can be routed to different CPUs depending on its workload, while a NMI interrupt canʼt be passed on and has to be handled by the CPU […]
Published on : May 4, 2019 by Smith Nevil
Preface:
Primary memory or Linux is not considered as a single block by Linux Kernel. Instead it is fragmented or may be a better word here would be divided or differentiated into different zones inside nodes. Zones can vary depending on the architecture. We will be considering only 64 bit for learning purposes. Nodes are how […]
Published on : May 1, 2019 by Vinayan C V
Preface:
Sometimes, you might have noticed high load on the CPU even though there is no unusual process running. mpstat is a useful command to monitor the CPU, it would tell you the CPU statistics. How the workload is balanced across the processors, whether a process is single threaded or not etc. The first processors will […]
Published on : April 29, 2019 by Aaden Dev
Preface:
Operating System manages and controls I/O operations and I/O devices. Let’s have a quick overview of different ways of interacting with I/O devices, before we go through what a ksoftirqd does. Interrupts – The CPU issues commands to the I/O module then proceeds with its normal work until interrupted by I/O device on completion of […]
