netdev - Re: [PATCH net-next v4] net: skb: introduce and use a single page frag cache

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 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]

Date:   Wed, 05 Oct 2022 09:33:11 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     patchwork-bot+netdevbpf@...nel.org,
        netdev <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexander Duyck <alexanderduyck@...com>
Subject: Re: [PATCH net-next v4] net: skb: introduce and use a single page
 frag cache

On Mon, 2022-10-03 at 15:30 -0700, Eric Dumazet wrote:
> I was using neper ( https://github.com/google/neper ), with 100
> threads and 4000 flows.
> 
> I suspect contention is hard to see unless you use a host with at
> least 128 cores.
> Also you need a lot of NIC receive queues (or use RPS to spread
> incoming packets to many cores)

Nice tool! It looks like it can load the host very easily.

I still can't observe the regression on my H/W but I see some minor
improvement with the proposed patch, FWIW.

I'll try to look for an host with more cores, but that can take a lot
to unlimited time.

> 
Cheers,

Paolo