netdev - Re: [Patch bpf-next v1 0/4] sockmap: some performance optimizations

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Date:   Sat, 30 Apr 2022 10:27:29 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jakub Sitnicki <jakub@...udflare.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Cong Wang <cong.wang@...edance.com>
Subject: Re: [Patch bpf-next v1 0/4] sockmap: some performance optimizations

On Tue, Apr 26, 2022 at 2:33 AM Jakub Sitnicki <jakub@...udflare.com> wrote:
>
> On Sun, Apr 10, 2022 at 09:10 AM -07, Cong Wang wrote:
> > From: Cong Wang <cong.wang@...edance.com>
> >
> > This patchset contains two optimizations for sockmap. The first one
> > eliminates a skb_clone() and the second one eliminates a memset(). After
> > this patchset, the throughput of UDP transmission via sockmap gets
> > improved by 61%.
>
> That's a pretty exact number ;-)
>
> Is this a measurement from metrics collected from a production
> enviroment, or were you using a synthetic benchmark?
>
> If it was the latter, would you be able to share the tooling?

Sure, actually my colleague Jiang modified Cloudflare's TCP
sockmap code for UDP, here is the link:
https://github.com/Jiang1155/cloudflare-blog/tree/skmap-udp

>
> I'm looking at extending the fio net engine with sockmap support, so
> that we can have a reference benchmark. It would be helpful to see which
> sockmap setup scenarios are worth focusing on.
>

Sounds a good idea.

Thanks.