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Linux-process-management

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zeus 3 years ago
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  1. 9
      Linux-process-management/Life_cycle_of_a_process.adoc

9
Linux-process-management/Life_cycle_of_a_process.adoc

@ -6,6 +6,7 @@ Apostolos rootApostolos@swarmlab.io
ifndef::env-browser[]
:data-uri:
endif::[]
:images-cdn: http://localhost:3080/asciidoc
:toc: right
:toc-title: Table of contents
:toclevels: 4
@ -23,7 +24,7 @@ endif::[]
[.float-group]
--
.fork-exec footnote:[http://www.it.uu.se/education/course/homepage/os/vt18/images/module-2/fork-exec-exit-wait.png[^]]
image::images/fork-exec-exit-wait.png[350,350,role="related thumb right"]
image::{images-cdn}/images/fork-exec-exit-wait.png[350,350,role="related thumb right"]
*fork()* is the the system call that the parent process uses to "divide" itself ("fork") into two identical processes.
@ -184,7 +185,7 @@ The threads of a process share its executable code and the values of its dynamic
[.float-group]
--
.A process with two threads footnote:[https://commons.wikimedia.org/w/index.php?curid=2233446[^]]
image::images/Multithreaded_process.png[350,350,role="related thumb right"]
image::{images-cdn}/images/Multithreaded_process.png[350,350,role="related thumb right"]
Threads in the same process share:
@ -244,7 +245,7 @@ it's computationally rather expensive to duplicate a process and a lot of subthr
[.float-group]
--
.Process Memory footnote:[https://gabrieletolomei.files.wordpress.com/2013/10/program_in_memory2.png?w=960[^]]
image::images/program_in_memory2.png[350,350,role="related thumb right"]
image::{images-cdn}/images/program_in_memory2.png[350,350,role="related thumb right"]
* Text Segment.
** The Text segment (a.k.a the Instruction segment) contains the executable program code and constant data.
@ -301,7 +302,7 @@ chrt allows to set your scheduling policy as well as priority.
[.float-group]
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.Structure of the Linux kernel footnote:[By ScotXW - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=47075153[^]]
image::images/Simplified_Structure_of_the_Linux_Kernel.png[350,350,role="related thumb right"]
image::{images-cdn}/images/Simplified_Structure_of_the_Linux_Kernel.png[350,350,role="related thumb right"]
The scheduler is the Linux kernel part that decides which runnable process will be executed by the CPU next.

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