A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

cpuidle: Make ladder governor honor latency requirements fully

Browse source 
ladder governor only honored latency requirement when promoting C-states.
Instead. it should check for latency requirement on each idle call,
and demote to appropriate C-state when there is a latency requirement change.

Signed-off-by: Venkatesh Pallipadi <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
This commit is contained in:
[email protected] 2008-07-30 19:21:44 -07:00 • committed by Andi Kleen
commit 06d9e908b2
1 changed files with 12 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/cpuidle/governors/ladder.c
View file

@ -98,6 +98,18 @@ static int ladder_select_state(struct cpuidle_device *dev)
}
/* consider demotion */
if (last_idx > CPUIDLE_DRIVER_STATE_START &&
dev->states[last_idx].exit_latency > latency_req) {
int i;
for (i = last_idx - 1; i > CPUIDLE_DRIVER_STATE_START; i--) {
if (dev->states[i].exit_latency <= latency_req)
break;
}
ladder_do_selection(ldev, last_idx, i);
return i;
}
if (last_idx > CPUIDLE_DRIVER_STATE_START &&
last_residency < last_state->threshold.demotion_time) {
last_state->stats.demotion_count++;