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authorPaul Turner <pjt@google.com>2011-07-21 09:43:28 -0700
committerIngo Molnar <mingo@elte.hu>2011-08-14 12:03:20 +0200
commitab84d31e15502fb626169ba2663381e34bf965b2 (patch)
tree658ce7caa6199aa74c5feea92ec8d3e9a2cb4296 /init/Kconfig
parent953bfcd10e6f3697233e8e5128c611d275da39c1 (diff)
downloadlinux-linaro-stable-ab84d31e15502fb626169ba2663381e34bf965b2.tar.gz
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/Kconfig12
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