netdev - Re: [Patch bpf-next v2 0/4] tcp_bpf: improve ingress redirection performance with message corking

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Message-ID: <Z/a0XH5lqh7raKd6@pop-os.localdomain>
Date: Wed, 9 Apr 2025 10:54:36 -0700
From: Cong Wang <xiyou.wangcong@...il.com>
To: netdev@...r.kernel.org
Cc: bpf@...r.kernel.org, jakub@...udflare.com, john.fastabend@...il.com,
	zhoufeng.zf@...edance.com
Subject: Re: [Patch bpf-next v2 0/4] tcp_bpf: improve ingress redirection
 performance with message corking

Hi John,

On Thu, Mar 06, 2025 at 02:02:01PM -0800, Cong Wang wrote:
> This patchset improves skmsg ingress redirection performance by a)
> sophisticated batching with kworker; b) skmsg allocation caching with
> kmem cache.
> 
> As a result, our patches significantly outperforms the vanilla kernel
> in terms of throughput for almost all packet sizes. The percentage
> improvement in throughput ranges from 3.13% to 160.92%, with smaller
> packets showing the highest improvements.
> 
> For latency, it induces slightly higher latency across most packet sizes
> compared to the vanilla, which is also expected since this is a natural
> side effect of batching.
> 

Per our in-person conversation at LSF/MM/BPF, you are okay with this
patchset. If so, may we get your ACK here? If not, please let us know
what changes you prefer to make for V3?

Thanks!