From: Yunsheng Lin <linyunsheng@huawei.com>
To: <davem@davemloft.net>, <kuba@kernel.org>
Cc: <olteanv@gmail.com>, <ast@kernel.org>, <daniel@iogearbox.net>,
<andriin@fb.com>, <edumazet@google.com>, <weiwan@google.com>,
<cong.wang@bytedance.com>, <ap420073@gmail.com>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linuxarm@openeuler.org>, <mkl@pengutronix.de>,
<linux-can@vger.kernel.org>, <jhs@mojatatu.com>,
<xiyou.wangcong@gmail.com>, <jiri@resnulli.us>,
<andrii@kernel.org>, <kafai@fb.com>, <songliubraving@fb.com>,
<yhs@fb.com>, <john.fastabend@gmail.com>, <kpsingh@kernel.org>,
<bpf@vger.kernel.org>, <jonas.bonn@netrounds.com>,
<pabeni@redhat.com>, <mzhivich@akamai.com>, <johunt@akamai.com>,
<albcamus@gmail.com>, <kehuan.feng@gmail.com>,
<a.fatoum@pengutronix.de>, <atenart@kernel.org>,
<alexander.duyck@gmail.com>, <hdanton@sina.com>,
<jgross@suse.com>, <JKosina@suse.com>, <mkubecek@suse.cz>,
<bjorn@kernel.org>, <alobakin@pm.me>
Subject: [PATCH net-next v3 0/3] Some optimization for lockless qdisc
Date: Tue, 22 Jun 2021 14:49:54 +0800 [thread overview]
Message-ID: <1624344597-11806-1-git-send-email-linyunsheng@huawei.com> (raw)
Patch 1: remove unnecessary seqcount operation.
Patch 2: implement TCQ_F_CAN_BYPASS.
Patch 3: remove qdisc->empty.
Performance data for pktgen in queue_xmit mode + dummy netdev
with pfifo_fast:
threads unpatched patched delta
1 2.60Mpps 3.21Mpps +23%
2 3.84Mpps 5.56Mpps +44%
4 5.52Mpps 5.58Mpps +1%
8 2.77Mpps 2.76Mpps -0.3%
16 2.24Mpps 2.23Mpps -0.4%
Performance for IP forward testing: 1.05Mpps increases to
1.16Mpps, about 10% improvement.
V3: Add 'Acked-by' from Jakub and 'Tested-by' from Vladimir,
and resend based on latest net-next.
V2: Adjust the comment and commit log according to discussion
in V1.
V1: Drop RFC tag, add nolock_qdisc_is_empty() and do the qdisc
empty checking without the protection of qdisc->seqlock to
aviod doing unnecessary spin_trylock() for contention case.
RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty
qdisc, and add patch 1 and 3.
Yunsheng Lin (3):
net: sched: avoid unnecessary seqcount operation for lockless qdisc
net: sched: implement TCQ_F_CAN_BYPASS for lockless qdisc
net: sched: remove qdisc->empty for lockless qdisc
include/net/sch_generic.h | 31 ++++++++++++++++++-------------
net/core/dev.c | 27 +++++++++++++++++++++++++--
net/sched/sch_generic.c | 23 ++++++++++++++++-------
3 files changed, 59 insertions(+), 22 deletions(-)
--
2.7.4
next reply other threads:[~2021-06-22 6:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 6:49 Yunsheng Lin [this message]
2021-06-22 6:49 ` [PATCH net-next v3 1/3] net: sched: avoid unnecessary seqcount operation for lockless qdisc Yunsheng Lin
2021-06-22 6:49 ` [PATCH net-next v3 2/3] net: sched: implement TCQ_F_CAN_BYPASS " Yunsheng Lin
2021-06-22 6:49 ` [PATCH net-next v3 3/3] net: sched: remove qdisc->empty " Yunsheng Lin
2021-06-23 19:40 ` [PATCH net-next v3 0/3] Some optimization " patchwork-bot+netdevbpf
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