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[2a10:fc81:a806:d6a9::1]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42e902b67a2sm31569725e9.36.2024.09.24.13.30.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Sep 2024 13:30:31 -0700 (PDT) Date: Tue, 24 Sep 2024 22:30:29 +0200 From: Stefano Brivio To: Jon Maloy Subject: Re: [PATCH v3 0/2] tcp: unify IPv4 and IPv6 tap queues Message-ID: <20240924223029.08626c71@elisabeth> In-Reply-To: <20240919184409.3511070-1-jmaloy@redhat.com> References: <20240919184409.3511070-1-jmaloy@redhat.com> Organization: Red Hat X-Mailer: Claws Mail 4.2.0 (GTK 3.24.41; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Message-ID-Hash: ABQIVC2333HRYDZLP73AJKMRBQDDFF6I X-Message-ID-Hash: ABQIVC2333HRYDZLP73AJKMRBQDDFF6I X-MailFrom: sbrivio@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: passt-dev@passt.top, lvivier@redhat.com, dgibson@redhat.com X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Thu, 19 Sep 2024 14:44:07 -0400 Jon Maloy wrote: > This should save us some memory and code. >=20 > --- > v2: - Setting pointers to pre-set IP and MAC headers on the fly > instead of copying them. > - Merged patch #2 and #3 from v1 > v3: - Changes based on feedback from team Sorry for the delay, now tests go a bit further but I have a similar problem as I had on v2: guest to host, IPv6, with 65520 bytes MTU only (perf/passt_tcp case), the iperf3 server fails to receive results, test suite output: =3D=3D=3D perf/passt_tcp > passt: throughput and latency Throughput in Gbps, latency in =C2=B5s, 4 threads at 3.6 GHz MTU: | 256B | 576B | 1280B | = 1500B | 9000B | 65520B | |--------|--------|--------|--= ------|--------|--------| TCP throughput over IPv6: guest to host | - | - | 5.8 | = 6.5 | 18.1 | and matching iperf3 server output: - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 6] 0.00-1.01 sec 568 MBytes 4.74 Gbits/sec recei= ver [ 9] 0.00-1.01 sec 621 MBytes 5.18 Gbits/sec recei= ver [ 11] 0.00-1.01 sec 569 MBytes 4.75 Gbits/sec recei= ver [ 13] 0.00-1.01 sec 675 MBytes 5.63 Gbits/sec recei= ver [SUM] 0.00-1.01 sec 2.38 GBytes 20.3 Gbits/sec recei= ver iperf3: error - unable to receive results: Bad file descriptor after that, connectivity from the guest seems to be pretty much gone. I didn't debug further. --=20 Stefano