netdev - Re: [RFC v2 00/19] io

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <af0d6b3e-85d0-9b61-4acd-5eef1375f934@gmail.com>
Date:   Tue, 21 Dec 2021 15:43:29 +0000
From:   Pavel Begunkov <asml.silence@...il.com>
To:     io-uring@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        David Ahern <dsahern@...nel.org>, Jens Axboe <axboe@...nel.dk>
Subject: Re: [RFC v2 00/19] io_uring zerocopy tx

On 12/21/21 15:35, Pavel Begunkov wrote:
> Update on io_uring zerocopy tx, still RFC. For v1 and design notes see
[...]
> 
> Benchmarks for dummy netdev, UDP/IPv4, payload size=4096:
>   -n<N> is how many requests we submit per syscall. From io_uring perspective -n1
>         is wasteful and far from optimal, but included for comparison.
>   -z0   disables zerocopy, just normal io_uring send requests
>   -f    makes to flush "buffer free" notifications for every request
[...]> https://github.com/isilence/linux/tree/zc_v2
> https://github.com/isilence/liburing/tree/zc_v2
> 
> The Benchmark is <liburing>/test/send-zc,
> 
> send-zc [-f] [-n<N>] [-z0] -s<payload size> -D<dst ip> (-6|-4) [-t<sec>] udp

Attaching a standalone send-zc for convenience.

gcc -luring -O2 -o send-zc ./send-zc.c

-- 
Pavel Begunkov
View attachment "send-zc.c" of type "text/x-csrc" (8350 bytes)