system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-07-22 11:10:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

sched/balancing: Rename find_idlest_group() => sched_balance_find_dst_group()

Browse source 
Standardize scheduler load-balancing function names on the
sched_balance_() prefix.

Also use 'dst' instead of 'idlest', because it's not really
true that we return the 'idlest' group or CPU, we sort by
idle-exit latency and only return the idlest CPUs from the
lowest-latency set of CPUs.

The true 'idlest' CPUs often remain idle for a long time
and are never returned as long as the system is under-loaded.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Link: https://lore.kernel.org/r/20240308111819.1101550-13-mingo@kernel.org
This commit is contained in:
Ingo Molnar 2024-03-08 12:18:18 +01:00
parent 646ebaf51c
commit a88b170802
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
kernel/sched/fair.c
View file

@ -7098,7 +7098,7 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p,
}
static struct sched_group *
find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu);
sched_balance_find_dst_group(struct sched_domain *sd, struct task_struct *p, int this_cpu);
/*
* sched_balance_find_dst_group_cpu - find the idlest CPU among the CPUs in the group.
@ -7185,7 +7185,7 @@ static inline int find_idlest_cpu(struct sched_domain *sd, struct task_struct *p
continue;
}
group = find_idlest_group(sd, p, cpu);
group = sched_balance_find_dst_group(sd, p, cpu);
if (!group) {
sd = sd->child;
continue;
@ -10296,13 +10296,13 @@ static bool update_pick_idlest(struct sched_group *idlest,
}
/*
* find_idlest_group() finds and returns the least busy CPU group within the
* sched_balance_find_dst_group() finds and returns the least busy CPU group within the
* domain.
*
* Assumes p is allowed on at least one CPU in sd.
*/
static struct sched_group *
find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
sched_balance_find_dst_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
{
struct sched_group *idlest = NULL, *local = NULL, *group = sd->groups;
struct sg_lb_stats local_sgs, tmp_sgs;