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| author | Paul Turner <pjt@google.com> | 2011-07-21 09:43:28 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-08-14 12:03:20 +0200 |
| commit | ab84d31e15502fb626169ba2663381e34bf965b2 (patch) | |
| tree | 658ce7caa6199aa74c5feea92ec8d3e9a2cb4296 /init/Kconfig | |
| parent | 953bfcd10e6f3697233e8e5128c611d275da39c1 (diff) | |
| download | lwn-ab84d31e15502fb626169ba2663381e34bf965b2.tar.gz lwn-ab84d31e15502fb626169ba2663381e34bf965b2.zip | |
sched: Introduce primitives to account for CFS bandwidth tracking
In this patch we introduce the notion of CFS bandwidth, partitioned into
globally unassigned bandwidth, and locally claimed bandwidth.
- The global bandwidth is per task_group, it represents a pool of unclaimed
bandwidth that cfs_rqs can allocate from.
- The local bandwidth is tracked per-cfs_rq, this represents allotments from
the global pool bandwidth assigned to a specific cpu.
Bandwidth is managed via cgroupfs, adding two new interfaces to the cpu subsystem:
- cpu.cfs_period_us : the bandwidth period in usecs
- cpu.cfs_quota_us : the cpu bandwidth (in usecs) that this tg will be allowed
to consume over period above.
Signed-off-by: Paul Turner <pjt@google.com>
Signed-off-by: Nikhil Rao <ncrao@google.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110721184756.972636699@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index d62778390e55..d19b3a77ab44 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -715,6 +715,18 @@ config FAIR_GROUP_SCHED depends on CGROUP_SCHED default CGROUP_SCHED +config CFS_BANDWIDTH + bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED" + depends on EXPERIMENTAL + depends on FAIR_GROUP_SCHED + default n + help + This option allows users to define CPU bandwidth rates (limits) for + tasks running within the fair group scheduler. Groups with no limit + set are considered to be unconstrained and will run with no + restriction. + See tip/Documentation/scheduler/sched-bwc.txt for more information. + config RT_GROUP_SCHED bool "Group scheduling for SCHED_RR/FIFO" depends on EXPERIMENTAL |