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| author | Lennart Poettering <lennart@poettering.net> | 2015-09-11 16:48:24 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-09-11 18:31:49 +0200 |
| commit | d53d94743c5e5e3a4a668b0c707826a90a08949a (patch) | |
| tree | c9f88941f6a5f072263ee7707500d577bf077300 /man/systemd.resource-control.xml | |
| parent | afc966e288b5013de55c56b18ddc9a5723b865d5 (diff) | |
core: refactor cpu shares/blockio weight cgroup logic
Let's stop using the "unsigned long" type for weights/shares, and let's
just use uint64_t for this, as that's what we expose on the bus.
Unify parsers, and always validate the range for these fields.
Correct the default blockio weight to 500, since that's what the kernel
actually uses.
When parsing the weight/shares settings from unit files accept the empty
string as a way to reset the weight/shares value. When getting it via
the bus, uniformly map (uint64_t) -1 to unset.
Open up StartupCPUShares= and StartupBlockIOWeight= to transient units.
Diffstat (limited to 'man/systemd.resource-control.xml')
| -rw-r--r-- | man/systemd.resource-control.xml | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml index 6b9329bbee..98f4d75ddb 100644 --- a/man/systemd.resource-control.xml +++ b/man/systemd.resource-control.xml @@ -118,10 +118,11 @@ <listitem> <para>Assign the specified CPU time share weight to the - processes executed. Those options take an integer value and + processes executed. These options take an integer value and control the <literal>cpu.shares</literal> control group - attribute, which defaults to 1024. For details about this - control group attribute, see <ulink + attribute. The allowed range is 2 to 262144. 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 one slice relative to their CPU time share weight.</para> @@ -258,7 +259,7 @@ the executed processes. Takes a single weight value (between 10 and 1000) to set the default block IO weight. This controls the <literal>blkio.weight</literal> control group attribute, - which defaults to 1000. For details about this control group + which defaults to 500. For details about this control group attribute, see <ulink url="https://www.kernel.org/doc/Documentation/cgroups/blkio-controller.txt">blkio-controller.txt</ulink>. The available IO bandwidth is split up among all units within |