diff mbox series

[v2] cpuidle: add tracepoint for s2idle flow

Message ID 20250523072239.181371-1-qiwu.chen@transsion.com
State New
Headers show
Series [v2] cpuidle: add tracepoint for s2idle flow | expand

Commit Message

qiwu.chen May 23, 2025, 7:22 a.m. UTC 
Add the tracepoint cpu_idle in enter_s2idle_proper() for tracing
the s2idle enter and exit events with a determined idle state.

Signed-off-by: qiwu.chen <qiwu.chen@transsion.com>

Changes in v2:
- fix the build warning reported by kernel test robot in v1:
https://lore.kernel.org/all/20250520030922.9505-1-qiwu.chen@transsion.com/
---
 drivers/cpuidle/cpuidle.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 0835da449db8..9dca6a63e4ad 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -149,6 +149,7 @@  static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 
 	instrumentation_begin();
 
+	trace_cpu_idle(index, dev->cpu);
 	time_start = ns_to_ktime(local_clock_noinstr());
 
 	tick_freeze();
@@ -174,6 +175,7 @@  static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 	start_critical_timings();
 
 	time_end = ns_to_ktime(local_clock_noinstr());
+	trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
 
 	dev->states_usage[index].s2idle_time += ktime_us_delta(time_end, time_start);
 	dev->states_usage[index].s2idle_usage++;