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Revert "WIP: sched: Consider spare cpu capacity at task wake-up"

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This reverts commit 75a9695b619741019363f889c99c97c7bb823797.

Change-Id: I846b21f2bdeb0b0ca30ad65683564ed07a429428
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
[ minor merge changes ]
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
This commit is contained in:
Dietmar Eggemann 2016-12-04 17:47:53 +00:00 • committed by Andres Oportus
parent 5c015afebd
commit bd6ff3505f
1 changed files with 2 additions and 16 deletions
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18
kernel/sched/fair.c
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@ -5509,10 +5509,9 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p,
int this_cpu, int sd_flag)
{
struct sched_group *idlest = NULL, *group = sd->groups;
struct sched_group *fit_group = NULL, *spare_group = NULL;
struct sched_group *fit_group = NULL;
unsigned long min_load = ULONG_MAX, this_load = 0;
unsigned long fit_capacity = ULONG_MAX;
unsigned long max_spare_capacity = capacity_margin - SCHED_LOAD_SCALE;
int load_idx = sd->forkexec_idx;
int imbalance = 100 + (sd->imbalance_pct-100)/2;
@ -5520,7 +5519,7 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p,
load_idx = sd->wake_idx;
do {
unsigned long load, avg_load, spare_capacity;
unsigned long load, avg_load;
int local_group;
int i;
@ -5552,16 +5551,6 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p,
fit_capacity = capacity_of(i);
fit_group = group;
}
/*
* Look for group which has most spare capacity on a
* single cpu.
*/
spare_capacity = capacity_of(i) - cpu_util(i);
if (spare_capacity > max_spare_capacity) {
max_spare_capacity = spare_capacity;
spare_group = group;
}
}
/* Adjust by relative CPU capacity of the group */
@ -5578,9 +5567,6 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p,
if (fit_group)
return fit_group;
if (spare_group)
return spare_group;
if (!idlest || 100*this_load < imbalance*min_load)
return NULL;
return idlest;