From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
To: "Paul E . McKenney" <paulmck@kernel.org>
Cc: RCU <rcu@vger.kernel.org>,
Neeraj upadhyay <Neeraj.Upadhyay@amd.com>,
Boqun Feng <boqun.feng@gmail.com>,
Hillf Danton <hdanton@sina.com>,
Joel Fernandes <joel@joelfernandes.org>,
LKML <linux-kernel@vger.kernel.org>,
Uladzislau Rezki <urezki@gmail.com>,
Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>,
Frederic Weisbecker <frederic@kernel.org>
Subject: [PATCH 0/3] reduce latency of synchronize_rcu()
Date: Wed, 25 Oct 2023 16:09:12 +0200 [thread overview]
Message-ID: <20231025140915.590390-1-urezki@gmail.com> (raw)
Here is a small series that tends to reduce a waiting time of
synchronize_rcu() call. Please note, this is only limited to
a "normal" version.
As for performance figures, i used real test cases and a synthetic.
For example
- camera app launch time on our Android device is reduced by 9-13 percent;
- loading 100 kernel modules also get improved by 10-12 percent;
- synthetic gives 30 and higher percentage of boost.
Uladzislau Rezki (Sony) (3):
rcu: Reduce synchronize_rcu() waiting time
rcu: Add a trace event for synchronize_rcu_normal()
doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt
.../admin-guide/kernel-parameters.txt | 12 ++
include/trace/events/rcu.h | 27 ++++
kernel/rcu/tree.c | 152 +++++++++++++++++-
kernel/rcu/tree_exp.h | 2 +-
4 files changed, 191 insertions(+), 2 deletions(-)
--
2.30.2
next reply other threads:[~2023-10-25 14:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-25 14:09 Uladzislau Rezki (Sony) [this message]
2023-10-25 14:09 ` [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Uladzislau Rezki (Sony)
2023-10-25 15:13 ` Frederic Weisbecker
2023-10-26 13:00 ` Uladzislau Rezki
2023-10-26 14:22 ` Frederic Weisbecker
2023-10-26 15:14 ` Uladzislau Rezki
2023-10-25 17:17 ` Boqun Feng
2023-10-26 13:09 ` Uladzislau Rezki
2023-10-29 18:21 ` Boqun Feng
2023-11-01 10:33 ` Uladzislau Rezki
2023-11-01 15:35 ` Uladzislau Rezki
2023-11-02 1:04 ` Boqun Feng
2023-11-02 12:35 ` Uladzislau Rezki
2023-10-25 14:09 ` [PATCH 2/3] rcu: Add a trace event for synchronize_rcu_normal() Uladzislau Rezki (Sony)
2023-10-25 14:09 ` [PATCH 3/3] doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt Uladzislau Rezki (Sony)
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