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From: <yang.yang29@zte.com.cn>
To: <mingo@kernel.org>, <surenb@google.com>, <peterz@infradead.org>,
	<hannes@cmpxchg.org>
Cc: <mingo@redhat.com>, <linux-kernel@vger.kernel.org>,
	<juri.lelli@redhat.com>
Subject: [PATCH linux-next v3 1/4] sched/psi: Change update_triggers() to a 'void' function
Date: Tue, 10 Oct 2023 16:36:34 +0800 (CST)	[thread overview]
Message-ID: <202310101636345668937@zte.com.cn> (raw)
In-Reply-To: <ZST/WggW4hSVs9d4@gmail.com>

From: Yang Yang <yang.yang29@zte.com.cn>

Update_triggers() always returns 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 & simplifies
the function.

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

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));
-- 
2.25.1

  parent reply	other threads:[~2023-10-10  8:38 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-13 12:44 [PATCH linux-next] sched/psi: Avoid update triggers and rtpoll_total when it is unnecessary yang.yang29
2023-09-13 23:01 ` Suren Baghdasaryan
2023-09-14  2:02   ` yang.yang29
2023-09-14  5:53     ` yang.yang29
2023-09-14  9:10       ` yang.yang29
2023-09-27  0:14         ` Suren Baghdasaryan
2023-09-27  1:56           ` yang.yang29
2023-09-30 22:32         ` Suren Baghdasaryan
2023-10-07  6:21           ` [PATCH linux-next v2] " yang.yang29
2023-10-09 10:49             ` Ingo Molnar
2023-10-09 12:19               ` [PATCH linux-next 0/3] sched/psi: Optimize the process of updating triggers and rtpoll_total yang.yang29
2023-10-09 12:24               ` [PATCH linux-next 1/3] sched/psi: Change update_triggers() to a void function yang.yang29
2023-10-09 12:48                 ` Ingo Molnar
2023-10-09 12:59                 ` [tip: sched/core] sched/psi: Change update_triggers() to a 'void' function tip-bot2 for Yang Yang
2023-10-09 12:30               ` [PATCH linux-next 2/3] sched/psi: Avoid update triggers and rtpoll_total when it is unnecessary yang.yang29
2023-10-09 12:52                 ` Ingo Molnar
2023-10-09 17:42                   ` Suren Baghdasaryan
2023-10-10  2:12                     ` yang.yang29
2023-10-10  3:05                     ` [PATCH linux-next v2 0/4] sched/psi: Optimize the process of updating triggers and rtpoll_total yang.yang29
2023-10-10  3:09                     ` [PATCH linux-next v2 1/4] sched/psi: Change update_triggers() to a 'void' function yang.yang29
2023-10-10  7:38                       ` Ingo Molnar
2023-10-10  8:31                         ` [PATCH linux-next v3 0/4] sched/psi: Optimize the process of updating triggers and rtpoll_total yang.yang29
2023-10-10  8:36                         ` yang.yang29 [this message]
2023-10-19 16:01                           ` [PATCH linux-next v3 1/4] sched/psi: Change update_triggers() to a 'void' function Suren Baghdasaryan
2023-10-10  8:41                         ` [PATCH linux-next v3 2/4] sched/psi: Avoid update triggers and rtpoll_total when it is unnecessary yang.yang29
2023-10-11 21:15                           ` Ingo Molnar
2023-10-12  2:13                             ` yang.yang29
2023-10-19 16:04                             ` Suren Baghdasaryan
2023-10-11 21:20                           ` [tip: sched/core] sched/psi: Avoid updating PSI triggers and ->rtpoll_total when there are no state changes tip-bot2 for Yang Yang
2023-10-10  8:42                         ` [PATCH linux-next v3 3/4] sched/psi: update rtpoll_next_update after update triggers and rtpoll_total yang.yang29
2023-10-19 16:07                           ` Suren Baghdasaryan
2023-10-10  8:45                         ` [PATCH linux-next v3 4/4] sched/psi: Delete the function parameter update_total of update_triggers() yang.yang29
2023-10-11 21:20                           ` [tip: sched/core] sched/psi: Delete the 'update_total' function parameter from update_triggers() tip-bot2 for Yang Yang
2023-10-19 16:09                           ` [PATCH linux-next v3 4/4] sched/psi: Delete the function parameter update_total of update_triggers() Suren Baghdasaryan
2023-10-10  3:20                     ` [PATCH linux-next v2 2/4] sched/psi: Avoid update triggers and rtpoll_total when it is unnecessary yang.yang29
2023-10-10  3:24                     ` [PATCH linux-next v2 3/4] sched/psi: update rtpoll_next_update after update triggers and rtpoll_total yang.yang29
2023-10-10  3:28                     ` [PATCH linux-next v2 4/4] sched/psi: Delete the function parameter update_total of update_triggers() yang.yang29
2023-10-09 12:37               ` [PATCH linux-next 3/3] " yang.yang29

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