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Merge pull request #8133 from xordspar0/cpu-limit-details 

[CI:DOCS] Add more details about how CPU limits work
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OpenShift Merge Robot 2020-10-27 13:26:53 -04:00 committed by GitHub
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3 changed files with 30 additions and 18 deletions
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14
docs/source/markdown/podman-build.1.md
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@ -111,9 +111,10 @@ network namespaces can be found.
**--cpu-period**=*limit*
Limit the CPU CFS (Completely Fair Scheduler) period
Limit the container's CPU usage. This flag tell the kernel to restrict the container's CPU usage to the period you specify.
Set the CPU period for the Completely Fair Scheduler (CFS), which is a
duration in microseconds. Once the container's CPU quota is used up, it will
not be scheduled to run until the current period ends. Defaults to 100000
microseconds.
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see
@ -121,11 +122,12 @@ https://github.com/containers/podman/blob/master/troubleshooting.md#26-running-c
**--cpu-quota**=*limit*
Limit the CPU CFS (Completely Fair Scheduler) quota
Limit the CPU Completely Fair Scheduler (CFS) quota.
Limit the container's CPU usage. By default, containers run with the full
CPU resource. This flag tell the kernel to restrict the container's CPU usage
to the quota you specify.
CPU resource. The limit is a number in microseconds. If you provide a number,
the container will be allowed to use that much CPU time until the CPU period
ends (controllable via **--cpu-period**).
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see

18
docs/source/markdown/podman-create.1.md
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@ -103,9 +103,10 @@ Write the pid of the `conmon` process to a file. `conmon` runs in a separate pro
**--cpu-period**=*limit*
Limit the CPU CFS (Completely Fair Scheduler) period
Limit the container's CPU usage. This flag tell the kernel to restrict the container's CPU usage to the period you specify.
Set the CPU period for the Completely Fair Scheduler (CFS), which is a
duration in microseconds. Once the container's CPU quota is used up, it will
not be scheduled to run until the current period ends. Defaults to 100000
microseconds.
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see
@ -113,11 +114,12 @@ https://github.com/containers/podman/blob/master/troubleshooting.md#26-running-c
**--cpu-quota**=*limit*
Limit the CPU CFS (Completely Fair Scheduler) quota
Limit the CPU Completely Fair Scheduler (CFS) quota.
Limit the container's CPU usage. By default, containers run with the full
CPU resource. This flag tell the kernel to restrict the container's CPU usage
to the quota you specify.
CPU resource. The limit is a number in microseconds. If you provide a number,
the container will be allowed to use that much CPU time until the CPU period
ends (controllable via **--cpu-period**).
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see
@ -177,7 +179,9 @@ PID container CPU CPU share
**--cpus**=*number*
Number of CPUs. The default is *0.0* which means no limit.
Number of CPUs. The default is *0.0* which means no limit. This is shorthand
for **--cpu-period** and **--cpu-quota**, so you may only set either
**--cpus** or **--cpu-period** and **--cpu-quota**.
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see

16
docs/source/markdown/podman-run.1.md
View File

@ -118,7 +118,10 @@ Write the pid of the **conmon** process to a file. As **conmon** runs in a separ
**--cpu-period**=*limit*
Limit the container's CPU usage by setting CPU CFS (Completely Fair Scheduler) period.
Set the CPU period for the Completely Fair Scheduler (CFS), which is a
duration in microseconds. Once the container's CPU quota is used up, it will
not be scheduled to run until the current period ends. Defaults to 100000
microseconds.
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see
@ -126,11 +129,12 @@ https://github.com/containers/podman/blob/master/troubleshooting.md#26-running-c
**--cpu-quota**=*limit*
Limit the CPU CFS (Completely Fair Scheduler) quota.
Limit the CPU Completely Fair Scheduler (CFS) quota.
Limit the container's CPU usage. By default, containers run with the full
CPU resource. This flag tell the kernel to restrict the container's CPU usage
to the quota you specify.
CPU resource. The limit is a number in microseconds. If you provide a number,
the container will be allowed to use that much CPU time until the CPU period
ends (controllable via **--cpu-period**).
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see
@ -188,7 +192,9 @@ division of CPU shares:
**--cpus**=*number*
Number of CPUs. The default is *0.0* which means no limit.
Number of CPUs. The default is *0.0* which means no limit. This is shorthand
for **--cpu-period** and **--cpu-quota**, so you may only set either
**--cpus** or **--cpu-period** and **--cpu-quota**.
On some systems, changing the CPU limits may not be allowed for non-root
users. For more details, see