netdev - Re: [PATCH v2] skbuff: Improve the sending efficiency of __skb_send

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CANn89i+JziB6-WTqyK47=Otn8i6jShTz=kzTJbJdJgC0=Kfw6A@mail.gmail.com>
Date: Fri, 27 Jun 2025 03:19:27 -0700
From: Eric Dumazet <edumazet@...gle.com>
To: Feng Yang <yangfeng59949@....com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, horms@...nel.org, 
	willemb@...gle.com, almasrymina@...gle.com, kerneljasonxing@...il.com, 
	ebiggers@...gle.com, asml.silence@...il.com, aleksander.lobakin@...el.com, 
	stfomichev@...il.com, yangfeng@...inos.cn, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] skbuff: Improve the sending efficiency of __skb_send_sock

On Fri, Jun 27, 2025 at 2:44 AM Feng Yang <yangfeng59949@....com> wrote:
>
> From: Feng Yang <yangfeng@...inos.cn>
>
> By aggregating skb data into a bvec array for transmission, when using sockmap to forward large packets,
> what previously required multiple transmissions now only needs a single transmission, which significantly enhances performance.
> For small packets, the performance remains comparable to the original level.
>
> When using sockmap for forwarding, the average latency for different packet sizes
> after sending 10,000 packets is as follows:
> size    old(us)         new(us)
> 512     56              55
> 1472    58              58
> 1600    106             79
> 3000    145             108
> 5000    182             123
>
> Signed-off-by: Feng Yang <yangfeng@...inos.cn>

Instead of changing everything, have you tried strategically adding
MSG_MORE in this function ?