diff options
Diffstat (limited to 'Documentation/scheduler')
| -rw-r--r-- | Documentation/scheduler/sched-zone.txt | 41 |
1 files changed, 12 insertions, 29 deletions
diff --git a/Documentation/scheduler/sched-zone.txt b/Documentation/scheduler/sched-zone.txt index 4372e5c788c7..28313f144882 100644 --- a/Documentation/scheduler/sched-zone.txt +++ b/Documentation/scheduler/sched-zone.txt @@ -1238,35 +1238,6 @@ power mode. It ignores the actual D-state that a cluster may be in and assumes the worst case power cost of the highest D-state. It is means of biasing task placement away from idle clusters when necessary. - -*** 7.21 sched_lowspill_freq - -Default value: 0 - -Appears at /proc/sys/kernel/sched_lowspill_freq - -This is the first of two tunables designed to govern the load balancer behavior -at various frequency levels. This tunable defines the frequency of the little -cluster below which the big cluster is not permitted to pull tasks from the -little cluster as part of load balance. The idea is that below a certain -frequency, a cluster has enough remaining capacity that may not necessitate -migration of tasks. This helps in achieving consolidation of workload within -the little cluster when needed. - -*** 7.22 sched_pack_freq - -Default value: INT_MAX - -Appears at /proc/sys/kernel/sched_pack_freq - -This is the second of two tunables designed to govern the load balancer behavior -at various frequency levels. This tunable defines the frequency of the little -cluster beyond which the little cluster is now allowed to pull tasks from the -big cluster as part of load balance. The idea is that above a certain frequency -threshold the little cluster may not want to pull additional work from another -cluster. This helps in achieving consolidation of workload within the big -cluster when needed. - ***7.23 sched_early_detection_duration Default value: 9500000 @@ -1278,6 +1249,18 @@ tick for it to be eligible for the scheduler's early detection feature under scheduler boost. For more information on the feature itself please refer to section 5.2.1. +*** 7.24 sched_restrict_cluster_spill + +Default value: 0 + +Appears at /proc/sys/kernel/sched_restrict_cluster_spill + +This tunable can be used to restrict the higher capacity cluster pulling tasks +from the lower capacity cluster in the load balance path. The restriction is +lifted if all of the CPUS in the lower capacity cluster are above spill. +The power cost is used to break the ties if the capacity of clusters are same +for applying this restriction. + ========================= 8. HMP SCHEDULER TRACE POINTS ========================= |