From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>, bpf <bpf@vger.kernel.org>,
Network Development <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
David Ahern <dsahern@kernel.org>,
Eelco Chaudron <echaudro@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Alexander Duyck <alexander.duyck@gmail.com>,
Saeed Mahameed <saeed@kernel.org>,
"Fijalkowski, Maciej" <maciej.fijalkowski@intel.com>,
Tirthendu <tirthendu.sarkar@intel.com>,
brouer@redhat.com
Subject: Re: [PATCH v8 bpf-next 00/14] mvneta: introduce XDP multi-buffer support
Date: Thu, 22 Apr 2021 16:42:23 +0200 [thread overview]
Message-ID: <20210422164223.77870d28@carbon> (raw)
In-Reply-To: <CAJ8uoz2JpfdjvjJp-vjWuhw5z1=2D32jj-KktFnLN6Zd9ZVmAQ@mail.gmail.com>
On Thu, 22 Apr 2021 12:24:32 +0200
Magnus Karlsson <magnus.karlsson@gmail.com> wrote:
> On Wed, Apr 21, 2021 at 5:39 PM Jesper Dangaard Brouer
> <brouer@redhat.com> wrote:
> >
> > On Wed, 21 Apr 2021 16:12:32 +0200
> > Magnus Karlsson <magnus.karlsson@gmail.com> wrote:
> >
[...]
> > > more than I get.
> >
> > I clearly have a bug in the i40e driver. As I wrote later, I don't see
> > any packets transmitted for XDP_TX. Hmm, I using Mel Gorman's tree,
> > which contains the i40e/ice/ixgbe bug we fixed earlier.
Something is wrong with i40e, I changed git-tree to net-next (at
commit 5d869070569a) and XDP seems to have stopped working on i40e :-(
$ uname -a
Linux broadwell 5.12.0-rc7-net-next+ #600 SMP PREEMPT Thu Apr 22 15:13:15 CEST 2021 x86_64 x86_64 x86_64 GNU/Linux
When I load any XDP prog almost no packets are let through:
[kernel-bpf-samples]$ sudo ./xdp1 i40e2
libbpf: elf: skipping unrecognized data section(16) .eh_frame
libbpf: elf: skipping relo section(17) .rel.eh_frame for section(16) .eh_frame
proto 17: 1 pkt/s
proto 0: 0 pkt/s
proto 17: 0 pkt/s
proto 0: 0 pkt/s
proto 17: 1 pkt/s
On the same system my mlx5 NIC works fine:
[kernel-bpf-samples]$ sudo ./xdp1 mlx5p1
libbpf: elf: skipping unrecognized data section(16) .eh_frame
libbpf: elf: skipping relo section(17) .rel.eh_frame for section(16) .eh_frame
proto 17: 10984608 pkt/s
proto 17: 24374656 pkt/s
proto 17: 24339904 pkt/s
> > The call to xdp_convert_buff_to_frame() fails, but (see below) that
> > error is simply converted to I40E_XDP_CONSUMED. Thus, not even the
> > 'trace_xdp_exception' will be able to troubleshoot this. You/Intel
> > should consider making XDP_TX errors detectable (this will also happen
> > if TX ring don't have room).
>
> This is not good. Will submit a fix. Thanks for reporting Jesper.
Usually I use this command to troubleshoot:
sudo ./xdp_monitor --stats
But as driver i40e doesn't call the 'trace_xdp_exception' then I don't
capture any error this way.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2021-04-22 14:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-08 12:50 [PATCH v8 bpf-next 00/14] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 01/14] xdp: introduce mb in xdp_buff/xdp_frame Lorenzo Bianconi
2021-04-08 18:17 ` Vladimir Oltean
2021-04-09 16:03 ` Lorenzo Bianconi
2021-04-29 13:36 ` Jesper Dangaard Brouer
2021-04-29 13:54 ` Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 02/14] xdp: add xdp_shared_info data structure Lorenzo Bianconi
2021-04-08 13:39 ` Vladimir Oltean
2021-04-08 14:26 ` Lorenzo Bianconi
2021-04-08 18:06 ` kernel test robot
2021-04-08 18:06 ` kernel test robot
2021-04-08 12:50 ` [PATCH v8 bpf-next 03/14] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer Lorenzo Bianconi
2021-04-08 18:19 ` Vladimir Oltean
2021-04-09 16:24 ` Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 04/14] xdp: add multi-buff support to xdp_return_{buff/frame} Lorenzo Bianconi
2021-04-08 18:30 ` Vladimir Oltean
2021-04-09 16:28 ` Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 05/14] net: mvneta: add multi buffer support to XDP_TX Lorenzo Bianconi
2021-04-08 18:40 ` Vladimir Oltean
2021-04-09 16:36 ` Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 06/14] net: mvneta: enable jumbo frames for XDP Lorenzo Bianconi
2021-04-08 12:50 ` [PATCH v8 bpf-next 07/14] net: xdp: add multi-buff support to xdp_build_skb_from_fram Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 08/14] bpf: add multi-buff support to the bpf_xdp_adjust_tail() API Lorenzo Bianconi
2021-04-08 19:15 ` Vladimir Oltean
2021-04-08 20:54 ` Vladimir Oltean
2021-04-09 18:13 ` Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 09/14] bpd: add multi-buffer support to xdp copy helpers Lorenzo Bianconi
2021-04-08 20:57 ` Vladimir Oltean
2021-04-09 18:19 ` Lorenzo Bianconi
2021-04-08 21:04 ` Vladimir Oltean
2021-04-14 8:08 ` Eelco Chaudron
2021-04-08 12:51 ` [PATCH v8 bpf-next 10/14] bpf: add new frame_length field to the XDP ctx Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 11/14] bpf: move user_size out of bpf_test_init Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 12/14] bpf: introduce multibuff support to bpf_prog_test_run_xdp() Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 13/14] bpf: test_run: add xdp_shared_info pointer in bpf_test_finish signature Lorenzo Bianconi
2021-04-08 12:51 ` [PATCH v8 bpf-next 14/14] bpf: update xdp_adjust_tail selftest to include multi-buffer Lorenzo Bianconi
2021-04-09 0:56 ` [PATCH v8 bpf-next 00/14] mvneta: introduce XDP multi-buffer support John Fastabend
2021-04-09 20:16 ` Lorenzo Bianconi
2021-04-13 15:16 ` Eelco Chaudron
2021-04-16 14:27 ` Magnus Karlsson
2021-04-16 21:29 ` Lorenzo Bianconi
2021-04-16 23:00 ` Daniel Borkmann
2021-04-18 16:18 ` Jesper Dangaard Brouer
2021-04-19 6:20 ` Magnus Karlsson
2021-04-19 6:55 ` Lorenzo Bianconi
2021-04-20 13:49 ` Magnus Karlsson
2021-04-21 12:47 ` Jesper Dangaard Brouer
2021-04-21 14:12 ` Magnus Karlsson
2021-04-21 15:39 ` Jesper Dangaard Brouer
2021-04-22 10:24 ` Magnus Karlsson
2021-04-22 14:42 ` Jesper Dangaard Brouer [this message]
2021-04-22 15:05 ` Crash for i40e on net-next (was: [PATCH v8 bpf-next 00/14] mvneta: introduce XDP multi-buffer support) Jesper Dangaard Brouer
2021-04-23 5:28 ` Magnus Karlsson
2021-04-23 16:43 ` Alexander Duyck
2021-04-25 9:45 ` Magnus Karlsson
2021-04-27 18:28 ` [PATCH v8 bpf-next 00/14] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2021-04-28 7:41 ` Magnus Karlsson
2021-04-29 12:49 ` Jesper Dangaard Brouer
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