From: David Ahern <dsahern@gmail.com>
To: Pavel Begunkov <asml.silence@gmail.com>,
io-uring@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Jakub Kicinski <kuba@kernel.org>,
Jonathan Lemon <jonathan.lemon@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Willem de Bruijn <willemb@google.com>,
Eric Dumazet <edumazet@google.com>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
David Ahern <dsahern@kernel.org>, Jens Axboe <axboe@kernel.dk>
Subject: Re: [RFC 00/12] io_uring zerocopy send
Date: Tue, 30 Nov 2021 20:10:43 -0700 [thread overview]
Message-ID: <ae2d2dab-6f42-403a-f167-1ba3db3fd07f@gmail.com> (raw)
In-Reply-To: <cover.1638282789.git.asml.silence@gmail.com>
On 11/30/21 8:18 AM, Pavel Begunkov wrote:
> Early proof of concept for zerocopy send via io_uring. This is just
> an RFC, there are details yet to be figured out, but hope to gather
> some feedback.
>
> Benchmarking udp (65435 bytes) with a dummy net device (mtu=0xffff):
> The best case io_uring=116079 MB/s vs msg_zerocopy=47421 MB/s,
> or 2.44 times faster.
>
> № | test: | BW (MB/s) | speedup
> 1 | msg_zerocopy (non-zc) | 18281 | 0.38
> 2 | msg_zerocopy -z (baseline) | 47421 | 1
> 3 | io_uring (@flush=false, nr_reqs=1) | 96534 | 2.03
> 4 | io_uring (@flush=true, nr_reqs=1) | 89310 | 1.88
> 5 | io_uring (@flush=false, nr_reqs=8) | 116079 | 2.44
> 6 | io_uring (@flush=true, nr_reqs=8) | 109722 | 2.31
>
> Based on selftests/.../msg_zerocopy but more limited. You can use
> msg_zerocopy -r as usual for receive side.
>
...
Can you state the exact command lines you are running for all of the
commands? I tried this set (and commands referenced below) and my
mileage varies quite a bit.
Also, have you run this proposed change (and with TCP) across nodes
(ie., not just local process to local process via dummy interface)?
> Benchmark:
> https://github.com/isilence/liburing.git zc_v1
>
> or this file in particular:
> https://github.com/isilence/liburing/blob/zc_v1/test/send-zc.c
>
> To run the benchmark:
> ```
> cd <liburing_dir> && make && cd test
> # ./send-zc -4 [-p <port>] [-s <payload_size>] -D <destination> udp
> ./send-zc -4 -D 127.0.0.1 udp
> ```
>
> msg_zerocopy can be used for the server side, e.g.
> ```
> cd <linux-kernel>/tools/testing/selftests/net && make
> ./msg_zerocopy -4 -r [-p <port>] [-t <sec>] udp
> ```
>
next prev parent reply other threads:[~2021-12-01 3:10 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 15:18 [RFC 00/12] io_uring zerocopy send Pavel Begunkov
2021-11-30 15:18 ` [RFC 01/12] skbuff: add SKBFL_DONT_ORPHAN flag Pavel Begunkov
2021-11-30 15:18 ` [RFC 02/12] skbuff: pass a struct ubuf_info in msghdr Pavel Begunkov
2021-11-30 15:18 ` [RFC 03/12] net/udp: add support msgdr::msg_ubuf Pavel Begunkov
2021-11-30 15:18 ` [RFC 04/12] net: add zerocopy_sg_from_iter for bvec Pavel Begunkov
2021-11-30 15:18 ` [RFC 05/12] net: optimise page get/free for bvec zc Pavel Begunkov
2021-12-01 19:20 ` Jonathan Lemon
2021-12-01 20:17 ` Pavel Begunkov
2021-11-30 15:18 ` [RFC 06/12] io_uring: add send notifiers registration Pavel Begunkov
2021-11-30 15:18 ` [RFC 07/12] io_uring: infrastructure for send zc notifications Pavel Begunkov
2021-11-30 15:18 ` [RFC 08/12] io_uring: wire send zc request type Pavel Begunkov
2021-11-30 15:18 ` [RFC 09/12] io_uring: add an option to flush zc notifications Pavel Begunkov
2021-11-30 15:18 ` [RFC 10/12] io_uring: opcode independent fixed buf import Pavel Begunkov
2021-11-30 15:18 ` [RFC 11/12] io_uring: sendzc with fixed buffers Pavel Begunkov
2021-11-30 15:19 ` [RFC 12/12] io_uring: cache struct ubuf_info Pavel Begunkov
2021-12-01 3:10 ` David Ahern [this message]
2021-12-01 15:32 ` [RFC 00/12] io_uring zerocopy send Pavel Begunkov
2021-12-01 17:57 ` David Ahern
[not found] ` <889c0306-afed-62cd-d95b-a20b8e798979@gmail.com>
2021-12-01 19:20 ` David Ahern
2021-12-01 20:15 ` Pavel Begunkov
2021-12-01 21:51 ` Martin KaFai Lau
2021-12-01 22:35 ` David Ahern
2021-12-01 23:07 ` Martin KaFai Lau
2021-12-01 23:18 ` Pavel Begunkov
2021-12-02 15:48 ` Pavel Begunkov
2021-12-02 17:40 ` Martin KaFai Lau
2021-12-01 20:42 ` Pavel Begunkov
2021-12-01 14:31 ` Pavel Begunkov
2021-12-01 17:49 ` David Ahern
2021-12-01 19:59 ` Pavel Begunkov
2021-12-01 18:10 ` Willem de Bruijn
2021-12-01 19:59 ` Pavel Begunkov
2021-12-01 20:29 ` Pavel Begunkov
2021-12-02 0:36 ` Willem de Bruijn
2021-12-02 16:25 ` Pavel Begunkov
2021-12-02 0:32 ` Willem de Bruijn
2021-12-02 16:45 ` Pavel Begunkov
2021-12-02 21:25 ` Willem de Bruijn
2021-12-03 16:19 ` Pavel Begunkov
2021-12-03 16:30 ` Willem de Bruijn
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