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Subject: Re: [PATCH bpf-next] bpf: cpumap: Move xdp:xdp_cpumap_kthread tracepoint
 before rcv
From: patchwork-bot+netdevbpf@kernel.org
Message-Id: 
 <172606622953.943906.17362698555849146465.git-patchwork-notify@kernel.org>
Date: Wed, 11 Sep 2024 14:50:29 +0000
References: <47615d5b5e302e4bd30220473779e98b492d47cd.1725585718.git.dxu@dxuuu.xyz>
In-Reply-To: <47615d5b5e302e4bd30220473779e98b492d47cd.1725585718.git.dxu@dxuuu.xyz>
To: Daniel Xu <dxu@dxuuu.xyz>
Cc: davem@davemloft.net, ast@kernel.org, hawk@kernel.org, kuba@kernel.org,
 daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org,
 martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
 yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me,
 haoluo@google.com, jolsa@kernel.org, netdev@vger.kernel.org,
 bpf@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo@kernel.org,
 aleksander.lobakin@intel.com, kernel-team@meta.com

Hello:

This patch was applied to bpf/bpf-next.git (net)
by Daniel Borkmann <daniel@iogearbox.net>:

On Thu,  5 Sep 2024 19:22:44 -0600 you wrote:
> cpumap takes RX processing out of softirq and onto a separate kthread.
> Since the kthread needs to be scheduled in order to run (versus softirq
> which does not), we can theoretically experience extra latency if the
> system is under load and the scheduler is being unfair to us.
> 
> Moving the tracepoint to before passing the skb list up the stack allows
> users to more accurately measure enqueue/dequeue latency introduced by
> cpumap via xdp:xdp_cpumap_enqueue and xdp:xdp_cpumap_kthread tracepoints.
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: cpumap: Move xdp:xdp_cpumap_kthread tracepoint before rcv
    https://git.kernel.org/bpf/bpf-next/c/23dc9867329c

You are awesome, thank you!
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