Thread (23 messages) 23 messages, 4 authors, 2025-02-11

Re: [RFC PATCH 03/11] sched: Add sched tracepoints for RV task model

From: Peter Zijlstra <peterz@infradead.org>
Date: 2025-02-06 08:19:46
Also in: lkml

On Thu, Feb 06, 2025 at 09:09:39AM +0100, Gabriele Monaco wrote:
quoted hunk ↗ jump to hunk
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9632e3318e0d6..af9fa18035c71 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -226,12 +226,14 @@ struct user_event_mm;
 #define __set_current_state(state_value)				\
 	do {								\
 		debug_normal_state_change((state_value));		\
+		trace_set_current_state(state_value);			\
 		WRITE_ONCE(current->__state, (state_value));		\
 	} while (0)
 
 #define set_current_state(state_value)					\
 	do {								\
 		debug_normal_state_change((state_value));		\
+		trace_set_current_state(state_value);			\
 		smp_store_mb(current->__state, (state_value));		\
 	} while (0)
 
@@ -247,6 +249,7 @@ struct user_event_mm;
 									\
 		raw_spin_lock_irqsave(&current->pi_lock, flags);	\
 		debug_special_state_change((state_value));		\
+		trace_set_current_state(state_value);			\
 		WRITE_ONCE(current->__state, (state_value));		\
 		raw_spin_unlock_irqrestore(&current->pi_lock, flags);	\
 	} while (0)
@@ -282,6 +285,7 @@ struct user_event_mm;
 		raw_spin_lock(&current->pi_lock);			\
 		current->saved_state = current->__state;		\
 		debug_rtlock_wait_set_state();				\
+		trace_set_current_state(TASK_RTLOCK_WAIT);		\
 		WRITE_ONCE(current->__state, TASK_RTLOCK_WAIT);		\
 		raw_spin_unlock(&current->pi_lock);			\
 	} while (0);
@@ -291,6 +295,7 @@ struct user_event_mm;
 		lockdep_assert_irqs_disabled();				\
 		raw_spin_lock(&current->pi_lock);			\
 		debug_rtlock_wait_restore_state();			\
+		trace_set_current_state(TASK_RUNNING);			\
 		WRITE_ONCE(current->__state, current->saved_state);	\
 		current->saved_state = TASK_RUNNING;			\
 		raw_spin_unlock(&current->pi_lock);			\
quoted hunk ↗ jump to hunk
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 165c90ba64ea9..fb5f8aa61ef5d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -491,6 +491,12 @@ sched_core_dequeue(struct rq *rq, struct task_struct *p, int flags) { }
 
 #endif /* CONFIG_SCHED_CORE */
 
+void trace_set_current_state(int state_value)
+{
+	trace_sched_set_state_tp(current, current->__state, state_value);
+}
+EXPORT_SYMBOL(trace_set_current_state);
Urgh, why !?!
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help