:PROPERTIES: :ID: 64370e0d-7608-44dc-a647-28fe2e3ef3a4 :mtime: 20240525073158 20240305024311 :ctime: 20240305024310 :END: #+title: process lifecycle #+filetags: :public:project: * Process States There are 5 states an [[id:ea9ceb4e-ff99-4939-ad40-90d5dae2d567][operating system process]] can be in: ** New process is being [[id:b46acdba-9a9d-4ec7-89f7-2ef1170e4457][created]] ** Ready process is ready to run, and is waiting for the CPU ** Running process’ instructions are being executed on the CPU ** Waiting (Blocked) process has stopped executing, and is waiting for an event to occur ** Terminated (Exit) process has finished executing * Lifecycle Diagram #+BEGIN_SRC dot :file lifecycle.png :cmdline -Kdot -Tpng :exports both digraph lifecycle { new -> ready [label="admitted"]; ready -> running [label="scheduler dispatch"]; running -> ready [label="interrupt/preempt"]; running -> waiting [label="IO or event wait"]; running -> terminated [label="exit"]; waiting -> ready [label="IO or event completion"]; } #+END_SRC #+RESULTS: [[file:lifecycle.png]]