Difference between revisions of "Cgroups"

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{{Draft}}
 
{{Draft}}
  
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==Packages==
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cgroups functionality that was released in [[Linux Kernel]] version [[2.6.24]]
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Packages:
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* <code>[[cgroup-lite]]</code>: <code>[[cgroups-mount]], [[cgroups-umount]]</code>
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* <code>[[cgroup-tools]]</code>: <code>[[cgcreate]]</code>, <code>[[cgexec]]</code>, <code>[[lscgroup]]</code> among others
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* <code>[[cgroupfs-mount]]</code>
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[[systemd-cgls]]
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[[systemd-cgls]] memory
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[[systemd-cgtop]]
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==Basic Commands==
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*Create a group : <code>[[cgcreate]] -g memory:myGroup</code>
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*<code>[[cgexec]] -g memory:myGroup YOUR_PROGRAM_TO_EXEC</code>
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* You can use <code>[[cgget]]</code> to view the current limits, usage, & high watermarks of the group:
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sudo [[cgget]] -g memory:/myGroup|grep bytes
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memory.kmem.tcp.usage_in_bytes: 0
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memory.soft_limit_in_bytes: 9223372036854771712
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memory.kmem.tcp.max_usage_in_bytes: 0
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memory.max_usage_in_bytes: 0
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memory.limit_in_bytes: 9223372036854771712
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memory.kmem.max_usage_in_bytes: 0
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memory.usage_in_bytes: 0
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memory.kmem.limit_in_bytes: 9223372036854771712
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memory.kmem.usage_in_bytes: 0
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memory.kmem.tcp.limit_in_bytes: 9223372036854771712
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[[I/O]] control, more accurate cgroup I/O control with <code>blk-iocost</code><ref>https://kernelnewbies.org/Linux_5.4#More_accurate_cgroup_I.2FO_control_with_blk-iocost</ref>
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== Related terms ==
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* <code>[[ulimit]]</code>
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* [[Cgroups: cgroup mountpoint does not exist: unknown]]
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* [[Cgroups v2]]
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Sep 21 11:23:14 yourhostame dockerd[1850]: time="2023-09-21T11:23:14.096834108Z" level=warning msg="Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without [[swap]]."
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== Activities ==
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* Read https://wiki.archlinux.org/index.php/cgroups
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* How to limit to CPU and Memory : [[cgcreate]]
  
 
== See also ==
 
== See also ==
 
* <code>[[systemd-cgtop]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html</ref>, <code>[[docker stats]]</code>
 
* <code>[[systemd-cgtop]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html</ref>, <code>[[docker stats]]</code>
 
* <code>[[netdata]]</code> cgroups plugin
 
* <code>[[netdata]]</code> cgroups plugin
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* <code>[[lxcfs]]</code>
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* {{containers}}
−
 
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* {{cgroups}}
  
 
[[Category:Linux]]
 
[[Category:Linux]]

Latest revision as of 11:31, 21 September 2023

This article is a Draft. Help us to complete it.

Packages[edit]

cgroups functionality that was released in Linux Kernel version 2.6.24

Packages: 


systemd-cgls
systemd-cgls memory
systemd-cgtop

Basic Commands[edit]

  • Create a group : cgcreate -g memory:myGroup
  • cgexec -g memory:myGroup YOUR_PROGRAM_TO_EXEC


  • You can use cgget to view the current limits, usage, & high watermarks of the group:
sudo cgget -g memory:/myGroup|grep bytes 
memory.kmem.tcp.usage_in_bytes: 0
memory.soft_limit_in_bytes: 9223372036854771712
memory.kmem.tcp.max_usage_in_bytes: 0
memory.max_usage_in_bytes: 0
memory.limit_in_bytes: 9223372036854771712
memory.kmem.max_usage_in_bytes: 0
memory.usage_in_bytes: 0
memory.kmem.limit_in_bytes: 9223372036854771712
memory.kmem.usage_in_bytes: 0
memory.kmem.tcp.limit_in_bytes: 9223372036854771712

I/O control, more accurate cgroup I/O control with blk-iocost[1]

Related terms[edit]

Sep 21 11:23:14 yourhostame dockerd[1850]: time="2023-09-21T11:23:14.096834108Z" level=warning msg="Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap."

Activities[edit]

See also[edit]

  • ↑ https://kernelnewbies.org/Linux_5.4#More_accurate_cgroup_I.2FO_control_with_blk-iocost
  • ↑ https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html
    • Retrieved from "https://www.wikieduonline.com/index.php?title=Cgroups&oldid=266227"

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