linux-kernel - Re: [PATCH net-next v2 0/3] Some optimization for lockless qdisc

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Date:   Tue, 8 Jun 2021 15:53:49 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Yunsheng Lin <linyunsheng@...wei.com>, davem@...emloft.net,
        ast@...nel.org, daniel@...earbox.net, andriin@...com,
        edumazet@...gle.com, weiwan@...gle.com, cong.wang@...edance.com,
        ap420073@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxarm@...neuler.org,
        mkl@...gutronix.de, linux-can@...r.kernel.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, bpf@...r.kernel.org,
        jonas.bonn@...rounds.com, pabeni@...hat.com, mzhivich@...mai.com,
        johunt@...mai.com, albcamus@...il.com, kehuan.feng@...il.com,
        a.fatoum@...gutronix.de, atenart@...nel.org,
        alexander.duyck@...il.com, hdanton@...a.com, jgross@...e.com,
        JKosina@...e.com, mkubecek@...e.cz, bjorn@...nel.org,
        alobakin@...me
Subject: Re: [PATCH net-next v2 0/3] Some optimization for lockless qdisc

On Thu, Jun 03, 2021 at 11:35:48AM -0700, Jakub Kicinski wrote:
> On Thu, 3 Jun 2021 09:47:57 +0800 Yunsheng Lin wrote:
> > 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.
> 
> Acked-by: Jakub Kicinski <kuba@...nel.org>

Any idea why these patches are deferred in patchwork?
https://patchwork.kernel.org/project/netdevbpf/cover/1622684880-39895-1-git-send-email-linyunsheng@huawei.com/