linux-kernel - Re: [PATCH iwl-next v3 16/18] idpf: add support for XDP on Rx

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] [day] [month] [year] [list]

Message-ID: <20250805154604.680bde07@kernel.org>
Date: Tue, 5 Aug 2025 15:46:04 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Alexander Lobakin <aleksander.lobakin@...el.com>
Cc: <intel-wired-lan@...ts.osuosl.org>, Michal Kubiak
 <michal.kubiak@...el.com>, Maciej Fijalkowski
 <maciej.fijalkowski@...el.com>, Tony Nguyen <anthony.l.nguyen@...el.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>, Andrew Lunn
 <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, "Paolo Abeni" <pabeni@...hat.com>, Alexei
 Starovoitov <ast@...nel.org>, "Daniel Borkmann" <daniel@...earbox.net>,
 Simon Horman <horms@...nel.org>,
 <nxne.cnse.osdt.itp.upstreaming@...el.com>, <bpf@...r.kernel.org>,
 <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH iwl-next v3 16/18] idpf: add support for XDP on Rx

On Tue, 5 Aug 2025 18:09:40 +0200 Alexander Lobakin wrote:
> From: Jakub Kicinski <kuba@...nel.org>
> Date: Fri, 1 Aug 2025 15:33:43 -0700
> 
> > On Wed, 30 Jul 2025 18:07:15 +0200 Alexander Lobakin wrote:  
> >> Use __LIBETH_WORD_ACCESS to parse descriptors more efficiently when
> >> applicable. It really gives some good boosts and code size reduction
> >> on x86_64.  
> > 
> > Could you perhaps quantify the goodness of the boost with a number? :)  
> 
> Sure, only a matter of switching this definition and running the tests
> (and bloat-o-meter).
> Intel doesn't allow us to publish raw numbers (Gbps/Mpps), I hope the
> diff in percents (+ bloat-o-meter output) would be enough?

Yes, delta is perfect. Absolute numbers aren't very meaningful if you
don't specify all HW components and FW versions, and direction of wind
on the day, anyway :$