netdev - Re: [PATCH net-next 0/2] tcp: even faster connect() under stress

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: <CANn89i+ReWhfrZ14H0psRK1WfSZKm2v1fo9wq6f7jb847qWVaw@mail.gmail.com>
Date: Wed, 5 Mar 2025 05:01:16 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Neal Cardwell <ncardwell@...gle.com>, Kuniyuki Iwashima <kuniyu@...zon.com>, 
	Jason Xing <kernelxing@...cent.com>, Simon Horman <horms@...nel.org>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com
Subject: Re: [PATCH net-next 0/2] tcp: even faster connect() under stress

On Wed, Mar 5, 2025 at 4:45 AM Eric Dumazet <edumazet@...gle.com> wrote:
>
> This is a followup on the prior series, "tcp: scale connect() under pressure"
>
> Now spinlocks are no longer in the picture, we see a very high cost
> of the inet6_ehashfn() function.
>
> In this series (of 2), I change how lport contributes to inet6_ehashfn()
> to ensure better cache locality and call inet6_ehashfn()
> only once per connect() system call.
>
> This brings an additional 229 % increase of performance

This is 129 % additional QPS (going from 139866.80 to 320677.21)

Sorry for the confusion :)