From: Jamal Hadi Salim <jhs@mojatatu.com>
To: Brenden Blanco <bblanco@plumgrid.com>,
davem@davemloft.net, netdev@vger.kernel.org
Cc: Martin KaFai Lau <kafai@fb.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
Ari Saha <as754m@att.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Or Gerlitz <gerlitz.or@gmail.com>,
john.fastabend@gmail.com, hannes@stressinduktion.org,
Thomas Graf <tgraf@suug.ch>, Tom Herbert <tom@herbertland.com>,
Daniel Borkmann <daniel@iogearbox.net>
Subject: Re: [PATCH v6 05/12] Add sample for adding simple drop program to link
Date: Mon, 11 Jul 2016 07:09:26 -0400 [thread overview]
Message-ID: <57837E66.3050000@mojatatu.com> (raw)
In-Reply-To: <1467944124-14891-6-git-send-email-bblanco@plumgrid.com>
On 16-07-07 10:15 PM, Brenden Blanco wrote:
> Add a sample program that only drops packets at the BPF_PROG_TYPE_XDP_RX
> hook of a link. With the drop-only program, observed single core rate is
> ~20Mpps.
>
> Other tests were run, for instance without the dropcnt increment or
> without reading from the packet header, the packet rate was mostly
> unchanged.
>
> $ perf record -a samples/bpf/xdp1 $(</sys/class/net/eth0/ifindex)
> proto 17: 20403027 drops/s
>
So - devil's advocate speaking:
I can filter and drop with this very specific NIC at 10x as fast
in hardware, correct?
Would a different NIC (pick something like e1000) have served a better
example?
BTW: Brenden, now that i looked closer here, you really dont have
apple-apple comparison with dropping at tc ingress. You have a
tweaked prefetch and are intentionally running things on a single
core. Note: We are able to do 20Mpps drops with tc with a single
core (as shown in netdev11) on a NUC with removing driver overhead.
cheers,
jamal
next prev parent reply other threads:[~2016-07-11 11:09 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-08 2:15 [PATCH v6 00/12] Add driver bpf hook for early packet drop and forwarding Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 01/12] bpf: add XDP prog type for early driver filter Brenden Blanco
2016-07-09 8:14 ` Jesper Dangaard Brouer
2016-07-09 13:47 ` Tom Herbert
2016-07-10 13:37 ` Jesper Dangaard Brouer
2016-07-10 17:09 ` Brenden Blanco
2016-07-10 20:30 ` Tom Herbert
2016-07-11 10:15 ` Daniel Borkmann
2016-07-11 12:58 ` Jesper Dangaard Brouer
2016-07-10 20:27 ` Tom Herbert
2016-07-11 11:36 ` Jesper Dangaard Brouer
2016-07-10 20:56 ` Tom Herbert
2016-07-11 16:51 ` Brenden Blanco
2016-07-11 21:21 ` Daniel Borkmann
2016-07-10 21:04 ` Tom Herbert
2016-07-11 13:53 ` Jesper Dangaard Brouer
2016-07-08 2:15 ` [PATCH v6 02/12] net: add ndo to set xdp prog in adapter rx Brenden Blanco
2016-07-10 20:59 ` Tom Herbert
2016-07-11 10:35 ` Daniel Borkmann
2016-07-08 2:15 ` [PATCH v6 03/12] rtnl: add option for setting link xdp prog Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 04/12] net/mlx4_en: add support for fast rx drop bpf program Brenden Blanco
2016-07-09 14:07 ` Or Gerlitz
2016-07-10 15:40 ` Brenden Blanco
2016-07-10 16:38 ` Tariq Toukan
2016-07-09 19:58 ` Saeed Mahameed
2016-07-09 21:37 ` Or Gerlitz
2016-07-10 15:25 ` Tariq Toukan
2016-07-10 16:05 ` Brenden Blanco
2016-07-11 11:48 ` Saeed Mahameed
2016-07-11 21:49 ` Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 05/12] Add sample for adding simple drop program to link Brenden Blanco
2016-07-09 20:21 ` Saeed Mahameed
2016-07-11 11:09 ` Jamal Hadi Salim [this message]
2016-07-11 13:37 ` Jesper Dangaard Brouer
2016-07-16 14:55 ` Jamal Hadi Salim
2016-07-08 2:15 ` [PATCH v6 06/12] net/mlx4_en: add page recycle to prepare rx ring for tx support Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 07/12] bpf: add XDP_TX xdp_action for direct forwarding Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 08/12] net/mlx4_en: break out tx_desc write into separate function Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 09/12] net/mlx4_en: add xdp forwarding and data write support Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 10/12] bpf: enable direct packet data write for xdp progs Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 11/12] bpf: add sample for xdp forwarding and rewrite Brenden Blanco
2016-07-08 2:15 ` [PATCH v6 12/12] net/mlx4_en: add prefetch in xdp rx path Brenden Blanco
2016-07-08 3:56 ` Eric Dumazet
2016-07-08 4:16 ` Alexei Starovoitov
2016-07-08 6:56 ` Eric Dumazet
2016-07-08 16:49 ` Brenden Blanco
2016-07-10 20:48 ` Tom Herbert
2016-07-10 20:50 ` Tom Herbert
2016-07-11 14:54 ` Jesper Dangaard Brouer
2016-07-08 15:20 ` Jesper Dangaard Brouer
2016-07-08 16:02 ` [net-next PATCH RFC] mlx4: RX prefetch loop Jesper Dangaard Brouer
2016-07-11 11:09 ` Jesper Dangaard Brouer
2016-07-11 16:00 ` Brenden Blanco
2016-07-11 23:05 ` Alexei Starovoitov
2016-07-12 12:45 ` Jesper Dangaard Brouer
2016-07-12 16:46 ` Alexander Duyck
2016-07-12 19:52 ` Jesper Dangaard Brouer
2016-07-13 1:37 ` Alexei Starovoitov
2016-07-10 16:14 ` [PATCH v6 00/12] Add driver bpf hook for early packet drop and forwarding Tariq Toukan
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