evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

drivers: cpuidle: lpm-levels: Notify sched of idle state entry/exit

Browse source 
When entering a sleep mode, idle drivers notifies scheduler to help
scheduler make better scheduling decisions by not waking up sleeping
CPUs/clusters.i

The change was left out of original 4.4 merge due to dependency on
scheduler changes.

Change-Id: Id366432ac4acca390692ef810adbd6edec4a5bfb
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
This commit is contained in:
Mahesh Sivasubramanian 2016-03-07 11:27:15 -07:00 • committed by David Keitel
parent 8257cc8ac8
commit 78c5836a96
1 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/cpuidle/lpm-levels.c
View file

@ -680,6 +680,8 @@ static int cluster_configure(struct lpm_cluster *cluster, int idx,
/* Notify cluster enter event after successfully config completion */
cluster_notify(cluster, level, true);
sched_set_cluster_dstate(&cluster->child_cpus, idx, 0, 0);
cluster->last_level = idx;
return 0;
@ -816,6 +818,7 @@ static void cluster_unprepare(struct lpm_cluster *cluster,
BUG_ON(ret);
}
sched_set_cluster_dstate(&cluster->child_cpus, 0, 0, 0);
cluster_notify(cluster, &cluster->levels[last_level], false);
cluster_unprepare(cluster->parent, &cluster->child_cpus,
@ -1015,6 +1018,10 @@ static int lpm_cpuidle_enter(struct cpuidle_device *dev,
int64_t start_time = ktime_to_ns(ktime_get()), end_time;
struct power_params *pwr_params;
pwr_params = &cluster->cpu->levels[idx].pwr;
sched_set_cpu_cstate(smp_processor_id(), idx + 1,
pwr_params->energy_overhead, pwr_params->latency_us);
pwr_params = &cluster->cpu->levels[idx].pwr;
cpu_prepare(cluster, idx, true);
@ -1034,6 +1041,7 @@ exit:
cluster_unprepare(cluster, cpumask, idx, true, end_time);
cpu_unprepare(cluster, idx, true);
sched_set_cpu_cstate(smp_processor_id(), 0, 0, 0);
trace_cpu_idle_exit(idx, success);
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);