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Mon, 17 Jun 2024 11:32:22 -0700 (PDT) MIME-Version: 1.0 References: <CAC-fF8S8KL_d4QPWuQL+vAsQAfjnPA1m7hNP830qobHJ-4J3eA@mail.gmail.com> <20240617083049.412242fb@hermes.local> <CAC-fF8QcWvS-neMUq4HzY1Uh4cPnDFuVVnPLkC8B5ZtcReLTsQ@mail.gmail.com> In-Reply-To: <CAC-fF8QcWvS-neMUq4HzY1Uh4cPnDFuVVnPLkC8B5ZtcReLTsQ@mail.gmail.com> From: Isaac Boukris <iboukris@gmail.com> Date: Mon, 17 Jun 2024 21:32:11 +0300 Message-ID: <CAC-fF8RCdRtiZiQza5FOZpZBPzTQGyTAJ-6V7tZQCVu5cywUYg@mail.gmail.com> Subject: Re: dumpcap: weird failure with six IPv6 hosts in the filter To: Stephen Hemminger <stephen@networkplumber.org> Cc: users@dpdk.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions <users.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/users>, <mailto:users-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/users/> List-Post: <mailto:users@dpdk.org> List-Help: <mailto:users-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/users>, <mailto:users-request@dpdk.org?subject=subscribe> Errors-To: users-bounces@dpdk.org On Mon, Jun 17, 2024 at 6:57=E2=80=AFPM Isaac Boukris <iboukris@gmail.com> = wrote: > > On Mon, Jun 17, 2024 at 6:30=E2=80=AFPM Stephen Hemminger > <stephen@networkplumber.org> wrote: > > > > On Mon, 17 Jun 2024 10:11:47 +0300 > > Isaac Boukris <iboukris@gmail.com> wrote: > > > > > Hi Stephen, > > > > > > For instance, the following filter fais as follows (if I omit one hos= t > > > it works): > > > -f "host 1::1 or host 1::1 or host 1::1 or host 1::1 or host 1::1 or = host 1::1" > > > > > > EAL: Error - exiting with code: 1 > > > Cause: Packet dump enable on 0:0000:13:00.0 failed Connection timed= out > > > > > > On the server side I see: > > > Jun 16 15:17:08: EAL: failed to send to > > > (/tmp/dpdk/rte/mp_socket_262131_4a103955de0b7a) due to No such file o= r > > > directory > > > Jun 16 15:17:08: pdump_server(): failed to send to client:No such fil= e > > > or directory > > > Jun 16 15:17:08: EAL: Fail to handle message: mp_pdump > > > > > > Then subsequent requests fail with (even with no filter): > > > pdump_register_rx_callbacks(): rx callback for port=3D0 queue=3D0, al= ready exists > > > > > > I debugged the dpdk-mp-msg thread with gdb, as far as I can tell it > > > hangs an awful lot of time on rte_bpf_load() (~15 secs in my env), so > > > the client times out and by the time the server tries to respond the > > > client socket doesn't exist anymore. > > > > > > Thoughts? > > > > I tried testing this with current 24.07-rc code base and do not see any= problem > > (don't have real hardware needed to fix vdev to get tap to work). > > > > # ./build/app/dpdk-dumpcap -f "host 1::1 or host 1::1 or host 1::1 or h= ost 1::1 or host 1::1 or host 1::1" > > File: /tmp/dpdk-dumpcap_0_net_tap0_20240617082758.pcapng > > Capturing on 'net_tap0' > > Packets captured: 0 ^C > > Packets received/dropped on interface 'net_tap0': 0/0 (0.0) > > Thanks for giving it a try, I had thought it would easily reproduce as > it does for me (perhaps worth trying adding a host or two). > > I'll try a more recent dpdk version (currently running 23.11.0) and > try to narrow it further otherwise. Just a quick update that I still see the issue in my env with the master branch (24.07.0-rc0), I'm now testing by adding the filter to 'sample_filters' in test_bpf.c and running: time sudo build/app/dpdk-test bpf_convert_autotest With 5 hosts it takes less than 2 secs, with 6 it takes about 25 secs, i'll try to strace it maybe.