diff mbox series

[linux-next,1/3] sched/psi: Change update_triggers() to a void function

Message ID 202310092024289721617@zte.com.cn
State New
Headers
Series sched/psi: Optimize the process of updating triggers and rtpoll_total |

Commit Message

Yang Yang Oct. 9, 2023, 12:24 p.m. UTC 
  From: Yang Yang <yang.yang29@zte.com.cn>

Update_triggers() always return now + group->rtpoll_min_period, and the
return value is only used by psi_rtpoll_work(), so change update_triggers()
to a void function, let group->rtpoll_next_update = now +
group->rtpoll_min_period directly.
This will avoid unnecessary function return value passing.

Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Suggested-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/psi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

Comments

Ingo Molnar Oct. 9, 2023, 12:48 p.m. UTC | #1 
* yang.yang29@zte.com.cn <yang.yang29@zte.com.cn> wrote:

> From: Yang Yang <yang.yang29@zte.com.cn>
> 
> Update_triggers() always return now + group->rtpoll_min_period, and the
> return value is only used by psi_rtpoll_work(), so change update_triggers()
> to a void function, let group->rtpoll_next_update = now +
> group->rtpoll_min_period directly.
> This will avoid unnecessary function return value passing.
> 
> Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
> Suggested-by: Suren Baghdasaryan <surenb@google.com>
> Suggested-by: Ingo Molnar <mingo@kernel.org>

Thanks for the split-up!

I'll remove the Suggested-by tags you added for me: I didn't suggest the
changes themselves, only the split-up, which isn't credit-worthy :-)

Thanks,

	Ingo
diff mbox series

Patch

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 1d0f634725a6..be853f227e40 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -434,7 +434,7 @@  static u64 window_update(struct psi_window *win, u64 now, u64 value)
 	return growth;
 }

-static u64 update_triggers(struct psi_group *group, u64 now, bool *update_total,
+static void update_triggers(struct psi_group *group, u64 now, bool *update_total,
 						   enum psi_aggregators aggregator)
 {
 	struct psi_trigger *t;
@@ -503,8 +503,6 @@  static u64 update_triggers(struct psi_group *group, u64 now, bool *update_total,
 		/* Reset threshold breach flag once event got generated */
 		t->pending_event = false;
 	}
-
-	return now + group->rtpoll_min_period;
 }

 static u64 update_averages(struct psi_group *group, u64 now)
@@ -706,7 +704,8 @@  static void psi_rtpoll_work(struct psi_group *group)
 	}

 	if (now >= group->rtpoll_next_update) {
-		group->rtpoll_next_update = update_triggers(group, now, &update_total, PSI_POLL);
+		update_triggers(group, now, &update_total, PSI_POLL);
+		group->rtpoll_next_update = now + group->rtpoll_min_period;
 		if (update_total)
 			memcpy(group->rtpoll_total, group->total[PSI_POLL],
 				   sizeof(group->rtpoll_total));