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Sun, 15 Jun 2025 09:56:28 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: T9bfb5a61a13769a7 Date: Sun, 15 Jun 2025 15:56:26 +0200 From: "Ricard Bejarano" To: "Andrew Lunn" Cc: "Mika Westerberg" , netdev@vger.kernel.org, michael.jamet@intel.com, YehezkelShB@gmail.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Message-Id: In-Reply-To: References: <8672A9A1-6B32-4F81-8DFA-4122A057C9BE@bejarano.io> <38B49EF9-4A56-4004-91CF-5A2D591E202D@bejarano.io> <09f73d4d-efa3-479d-96b5-fd51d8687a21@lunn.ch> <78AA82DB-92BE-4CD5-8EC7-239E6A93A465@bejarano.io> <11d6270e-c4c9-4a3a-8d2b-d273031b9d4f@lunn.ch> <71C2308A-0E9C-4AD3-837A-03CE8EA4CA1D@bejarano.io> Subject: Re: Poor thunderbolt-net interface performance when bridged Content-Type: text/plain Content-Transfer-Encoding: 7bit > Did you manage to prove it is skbuf with fragments which are the > problem? As i said, adding the skb_linearize was just a debug tool, > not a fix. I did not, all my tests with skb_linearize made iperf3 fail. I did manage, however, to prove that all UDP SKBs we transmit are linear, thus all non-linear (if any) SKBs we see are TCP. Thus, I could not test loss with skb_linearize vs. loss without. Thanks, RB