From: Jakub Kicinski <kuba@kernel.org>
To: Bobby Eshleman <bobbyeshleman@gmail.com>
Cc: Eric Dumazet <edumazet@google.com>,
Neal Cardwell <ncardwell@google.com>,
Kuniyuki Iwashima <kuniyu@google.com>,
"David S. Miller" <davem@davemloft.net>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Stanislav Fomichev <sdf@fomichev.me>,
Mina Almasry <almasrymina@google.com>, David Wei <dw@davidwei.uk>,
Bobby Eshleman <bobbyeshleman@meta.com>
Subject: Re: [PATCH net-next] tcp: devmem: only pre-allocate tokens the receiver can consume
Date: Fri, 4 Sep 2026 15:11:46 -0700 [thread overview]
Message-ID: <20260904151146.602c61a4@kernel.org> (raw)
In-Reply-To: <20260902-b4-net-next_devmem-token-refill-v1-1-81d8990e5e17@meta.com>
On Wed, 02 Sep 2026 15:24:19 -0700 Bobby Eshleman wrote:
> Testing on a CX7 w/ GRO and a steady sendmsg() flow of 1MB per send, we
> see a typical RX-side skb touch upwards of ~32KB. With a 4KB recvmsg
> size, probing shows that ~75% of the allocated tokens are not used.
4kB seems unreasonably small. Is there a real life reason to use such
a small buffer / read length?
next prev parent reply other threads:[~2026-09-04 22:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-02 22:24 [PATCH net-next] tcp: devmem: only pre-allocate tokens the receiver can consume Bobby Eshleman
2026-09-04 22:11 ` Jakub Kicinski [this message]
2026-09-04 22:44 ` Bobby Eshleman
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