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cgroups.7: Add details on 'cpu' CFS bandwidth control 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2016-11-27 14:44:24 +01:00
parent d84631b325
commit 4ad9a70616
1 changed files with 10 additions and 0 deletions
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10
man7/cgroups.7
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@ -241,7 +241,17 @@ kernel configuration option.
Cgroups can be guaranteed a minimum number of "CPU shares"
when a system is busy.
This does not limit a cgroup's CPU usage if the CPUs are not busy.
For further information, see
.IR Documentation/scheduler/sched-design-CFS.txt .
In Linux 3.2,
this controller was extended to provide CPU "bandwidth" control.
If the kernel is configured with
.BR COONFIG_CFS_BANDWIDTH ,
then within each scheduling period
(defined via a file in the cgroup directory), it is possible to define
an upper limit on the CPU time allocated to the processes in a cgroup.
This upper limit applies even if there is no other competition for the CPU.
Further information can be found in the kernel source file
.IR Documentation/scheduler/sched\-bwc.txt .
.TP