diff options
Diffstat (limited to 'man/systemd.resource-control.xml')
| -rw-r--r-- | man/systemd.resource-control.xml | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml index a51e600ebb..5a996fd6df 100644 --- a/man/systemd.resource-control.xml +++ b/man/systemd.resource-control.xml @@ -117,11 +117,53 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. <term><varname>CPUShares=<replaceable>weight</replaceable></varname></term> <listitem> - <para>Assign the specified overall CPU time share weight to - the processes executed. Takes an integer value. This - controls the <literal>cpu.shares</literal> control group - attribute, which defaults to 1024. For details about this - control group attribute, see <ulink + <para>Assign the specified CPU time share weight to the + processes executed. Takes an integer value. This controls + the <literal>cpu.shares</literal> control group attribute, + which defaults to 1024. For details about this control group + attribute, see <ulink + url="https://www.kernel.org/doc/Documentation/scheduler/sched-design-CFS.txt">sched-design-CFS.txt</ulink> + The available CPU time is split up among all units within a + slice relative to their CPU time share weight.</para> + + <para>Implies <literal>CPUAccounting=true</literal>.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><varname>CPUQuota=</varname></term> + + <listitem> + <para>Assign the specified CPU time quota to the processes + executed. Takes a percentage value (suffixed with "%") or an + absolute time (suffixed by one of the common time units, us, + ms, s, ...). The percentage specifies how much CPU time the + unit shall get at maximum, relative to the total CPU time + available on one CPU. Use values > 100% for alloting CPU + time on more than one CPU. If an absolute time is specified + the processes of this unit will get this much absolute time + within each quota period, at maximum. This controls the + <literal>cpu.cfs_quota_us</literal> control group + attribute. For details about this control group attribute, + see <ulink + url="https://www.kernel.org/doc/Documentation/scheduler/sched-design-CFS.txt">sched-design-CFS.txt</ulink>.</para> + + <para>Example: <varname>CPUShares=20%</varname> ensures that + the executed processes will never get more than 20% CPU time + on one CPU.</para> + + <para>Implies <literal>CPUAccounting=true</literal>.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><varname>CPUQuotaPeriodSec=</varname></term> + + <listitem> + <para>Specify the CPU quota period to use. Defaults to + 100ms. This controls the <literal>cpu.cfs_period_us</literal> + control group attribute. For details about this control + group attribute, see <ulink url="https://www.kernel.org/doc/Documentation/scheduler/sched-design-CFS.txt">sched-design-CFS.txt</ulink>.</para> <para>Implies <literal>CPUAccounting=true</literal>.</para> |