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ANDROID: vendor_hook: modify cpuidle vendor hook 

When entering cluster-wide or system-wide power mode, Exynos cpu
power management driver checks the next hrtimer events of cpu
composing the power domain to prevent unnecessary attempts to enter
the power mode. Since struct cpuidle_device has next_hrtimer, it
can be solved by passing cpuidle device as a parameter of vh.

In order to improve responsiveness, it is necessary to prevent
entering the deep idle state in boosting scenario. So, vendor
driver should be able to control the idle state.

Due to above requirements, the parameters required for idle enter
and exit different, so the vendor hook is separated into
cpu_idle_enter and cpu_idle_exit.

Bug: 176198732

Change-Id: I2262ba1bae5e6622a8e76bc1d5d16fb27af0bb8a
Signed-off-by: Park Bumgyu <bumgyu.park@samsung.com>
This commit is contained in:
Park Bumgyu 2020-12-23 09:44:37 +09:00 committed by Todd Kjos
parent d749bc24dc
commit ae8ff465c5
3 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/android/vendor_hooks.c
View File

@ -64,7 +64,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_read_wait_finish);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_wait_start);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_wait_finish);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sched_show_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cpu_idle);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cpu_idle_enter);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cpu_idle_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mpam_set);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_busiest_group);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_gic_resume);

4
drivers/cpuidle/cpuidle.c
View File

@ -229,7 +229,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
/* Take note of the planned idle state. */
sched_idle_set_state(target_state);
trace_android_vh_cpu_idle(0, index, dev->cpu);
trace_android_vh_cpu_idle_enter(&index, dev);
trace_cpu_idle(index, dev->cpu);
time_start = ns_to_ktime(local_clock());
@ -244,7 +244,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
sched_clock_idle_wakeup_event();
time_end = ns_to_ktime(local_clock());
trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
trace_android_vh_cpu_idle(PWR_EVENT_EXIT, entered_state, dev->cpu);
trace_android_vh_cpu_idle_exit(entered_state, dev);
/* The cpu is no longer idle or about to enter idle. */
sched_idle_set_state(NULL);

14
include/trace/hooks/cpuidle.h
View File

@ -11,11 +11,17 @@
#include <trace/hooks/vendor_hooks.h>
#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_ANDROID_VENDOR_HOOKS)
DECLARE_HOOK(android_vh_cpu_idle,
TP_PROTO(int event, int state, int cpu),
TP_ARGS(event, state, cpu))
struct cpuidle_device;
DECLARE_HOOK(android_vh_cpu_idle_enter,
TP_PROTO(int *state, struct cpuidle_device *dev),
TP_ARGS(state, dev))
DECLARE_HOOK(android_vh_cpu_idle_exit,
TP_PROTO(int state, struct cpuidle_device *dev),
TP_ARGS(state, dev))
#else
#define trace_android_vh_cpu_idle(event, state, cpu)
#define trace_android_vh_cpu_idle_enter(state, dev)
#define trace_android_vh_cpu_idle_exit(state, dev)
#endif
#endif /* _TRACE_HOOK_CPUIDLE_H */