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cgroups (abbreviated from control groups) is a Linux kernel feature that limits, accounts for, and isolates the resource usage (CPU, memory, disk I/O, etc. [1]) of a collection of processes. Engineers at Google started the work on this feature in 2006 under the name "process containers". [2]
htop is an interactive system monitor process viewer and process manager. It is designed as an alternative to the Unix program top.. It shows a frequently updated list of the processes running on a computer, normally ordered by the amount of CPU usage.
The program produces an ordered list of running processes selected by user-specified criteria, and updates it periodically. Default ordering is by CPU usage, and only the top CPU consumers are shown. top shows how much processing power and memory are being used, as well as other information about the running processes.
You can check your CPU usage on a PC or Mac using programs already installed on your computer, like the Task Manager and Activity Monitor.
CPU: 64-bit (2022) LXDE Ubuntu LTS APT 1300 MB Older computers, intermediate users 2022 LXLE team 2012 Ronnie Nanolinux: RAM: 64 MB (2017) [43] CPU: 486 SLWM on Nano-X
%CPU: How much of the CPU the process is using %MEM: How much memory the process is using ADDR: Memory address of the process C or CP: CPU usage and scheduling information COMMAND* Name of the process, including arguments, if any NI: nice value F: Flags PID: Process ID number PPID: ID number of the process's parent process PRI: Priority of the ...
nice is a program found on Unix and Unix-like operating systems such as Linux.It directly maps to a kernel call of the same name. nice is used to invoke a utility or shell script with a particular CPU priority, thus giving the process more or less CPU time than other processes.
System Activity Report (sar) is a Unix System V-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, interrupts, device load, network and swap space utilization. Sar uses /proc filesystem for gathering information. [2]