From: "tip-bot2 for Yang Yang" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Yang Yang <yang.yang29@zte.com.cn>,
Ingo Molnar <mingo@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Suren Baghdasaryan <surenb@google.com>,
Peter Ziljstra <peterz@infradead.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: sched/core] sched/psi: Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
Date: Wed, 11 Oct 2023 21:20:46 -0000 [thread overview]
Message-ID: <169705924655.3135.2049174551799896356.tip-bot2@tip-bot2> (raw)
In-Reply-To: <202310101641075436843@zte.com.cn>
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 80cc1d1d5ee35701daf11725ce06d8a240588973
Gitweb: https://git.kernel.org/tip/80cc1d1d5ee35701daf11725ce06d8a240588973
Author: Yang Yang <yang.yang29@zte.com.cn>
AuthorDate: Tue, 10 Oct 2023 16:41:07 +08:00
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 11 Oct 2023 23:07:50 +02:00
sched/psi: Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
When psimon wakes up and there are no state changes for ->rtpoll_states,
it's unnecessary to update triggers and ->rtpoll_total because the pressures
being monitored by the user have not changed.
This will help to slightly reduce unnecessary computations of PSI.
[ mingo: Changelog updates ]
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Peter Ziljstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/202310101641075436843@zte.com.cn
---
kernel/sched/psi.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index be853f2..79f8db0 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -704,11 +704,12 @@ static void psi_rtpoll_work(struct psi_group *group)
}
if (now >= group->rtpoll_next_update) {
- update_triggers(group, now, &update_total, PSI_POLL);
- group->rtpoll_next_update = now + group->rtpoll_min_period;
- if (update_total)
+ if (changed_states & group->rtpoll_states) {
+ update_triggers(group, now, &update_total, PSI_POLL);
memcpy(group->rtpoll_total, group->total[PSI_POLL],
sizeof(group->rtpoll_total));
+ }
+ group->rtpoll_next_update = now + group->rtpoll_min_period;
}
psi_schedule_rtpoll_work(group,
next prev parent reply other threads:[~2023-10-11 21:20 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 ` [PATCH linux-next v3 1/4] sched/psi: Change update_triggers() to a 'void' function yang.yang29
2023-10-19 16:01 ` 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-bot2 for Yang Yang [this message]
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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