netdev - Re: [PATCH v1 00/15] 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: <93036b67-018a-44fb-8d12-7328c58be3c4@kernel.org>
Date: Wed, 9 Oct 2024 09:38:24 -0600
From: David Ahern <dsahern@...nel.org>
To: Jens Axboe <axboe@...nel.dk>, David Wei <dw@...idwei.uk>,
 io-uring@...r.kernel.org, netdev@...r.kernel.org
Cc: Pavel Begunkov <asml.silence@...il.com>, Jakub Kicinski
 <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 Mina Almasry <almasrymina@...gle.com>
Subject: Re: [PATCH v1 00/15] io_uring zero copy rx

On 10/9/24 9:27 AM, Jens Axboe wrote:
> On 10/7/24 4:15 PM, David Wei wrote:
>> ===========
>> Performance
>> ===========
>>
>> Test setup:
>> * AMD EPYC 9454
>> * Broadcom BCM957508 200G
>> * Kernel v6.11 base [2]
>> * liburing fork [3]
>> * kperf fork [4]
>> * 4K MTU
>> * Single TCP flow
>>
>> With application thread + net rx softirq pinned to _different_ cores:
>>
>> epoll
>> 82.2 Gbps
>>
>> io_uring
>> 116.2 Gbps (+41%)
>>
>> Pinned to _same_ core:
>>
>> epoll
>> 62.6 Gbps
>>
>> io_uring
>> 80.9 Gbps (+29%)
> 
> I'll review the io_uring bits in detail, but I did take a quick look and
> overall it looks really nice.
> 
> I decided to give this a spin, as I noticed that Broadcom now has a
> 230.x firmware release out that supports this. Hence no dependencies on
> that anymore, outside of some pain getting the fw updated. Here are my
> test setup details:
> 
> Receiver:
> AMD EPYC 9754 (recei
> Broadcom P2100G
> -git + this series + the bnxt series referenced
> 
> Sender:
> Intel(R) Xeon(R) Platinum 8458P
> Broadcom P2100G
> -git
> 
> Test:
> kperf with David's patches to support io_uring zc. Eg single flow TCP,
> just testing bandwidth. A single cpu/thread being used on both the
> receiver and sender side.
> 
> non-zc
> 60.9 Gbps
> 
> io_uring + zc
> 97.1 Gbps

so line rate? Did you look at whether there is cpu to spare? meaning it
will report higher speeds with a 200G setup?