lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpuidle: record state entry failed statistics

Browse Source 
When CPUs fail to enter the chosen idle state because of pending
interrupt, let's record that and show along with other statistics for
the idle state.

Change-Id: I22265e8a86160c98a7ae810808b6b4821a6633b6
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
This commit is contained in:
Lina Iyer 2020-04-28 14:02:19 -06:00
parent 67629947f6
commit 8bd86be3cc
4 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/cpuidle/Kconfig
View File

@ -18,6 +18,17 @@ if CPU_IDLE
config CPU_IDLE_MULTIPLE_DRIVERS
bool
config QGKI_CPUIDLE_FAILED_STAT
bool "Record failed attempts at entering idle states"
depends on QGKI
help
CPU idle maintains statistics for successful entry to each idle
state. It is also useful to record statistics of failure to
enter each idle state.
Save and report the failed statistics in sysfs along with usage
statistics.
config CPU_IDLE_GOV_LADDER
bool "Ladder governor (for periodic timer tick)"

3
drivers/cpuidle/cpuidle.c
View File

@ -291,6 +291,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
}
} else {
dev->last_residency = 0;
#ifdef CONFIG_QGKI_CPUIDLE_FAILED_STAT
dev->states_usage[index].failed++;
#endif
}
return entered_state;

9
drivers/cpuidle/sysfs.c
View File

@ -297,6 +297,9 @@ define_show_state_function(target_residency)
define_show_state_function(power_usage)
define_show_state_ull_function(usage)
define_show_state_ull_function(time)
#ifdef CONFIG_QGKI_CPUIDLE_FAILED_STAT
define_show_state_ull_function(failed)
#endif
define_show_state_str_function(name)
define_show_state_str_function(desc)
define_show_state_ull_function(disable)
@ -310,6 +313,9 @@ define_one_state_ro(latency, show_state_exit_latency);
define_one_state_ro(residency, show_state_target_residency);
define_one_state_ro(power, show_state_power_usage);
define_one_state_ro(usage, show_state_usage);
#ifdef CONFIG_QGKI_CPUIDLE_FAILED_STAT
define_one_state_ro(failed, show_state_failed);
#endif
define_one_state_ro(time, show_state_time);
define_one_state_rw(disable, show_state_disable, store_state_disable);
define_one_state_ro(above, show_state_above);
@ -322,6 +328,9 @@ static struct attribute *cpuidle_state_default_attrs[] = {
&attr_residency.attr,
&attr_power.attr,
&attr_usage.attr,
#ifdef CONFIG_QGKI_CPUIDLE_FAILED_STAT
&attr_failed.attr,
#endif
&attr_time.attr,
&attr_disable.attr,
&attr_above.attr,

3
include/linux/cpuidle.h
View File

@ -35,6 +35,9 @@ struct cpuidle_state_usage {
unsigned long long time; /* in US */
unsigned long long above; /* Number of times it's been too deep */
unsigned long long below; /* Number of times it's been too shallow */
#ifdef CONFIG_QGKI_CPUIDLE_FAILED_STAT
unsigned long long failed; /* Number of times it failed to enter */
#endif
#ifdef CONFIG_SUSPEND
unsigned long long s2idle_usage;
unsigned long long s2idle_time; /* in US */