From: Jesper Dangaard Brouer <jbrouer@redhat.com>
To: Shenwei Wang <shenwei.wang@nxp.com>,
Jesper Dangaard Brouer <jbrouer@redhat.com>,
Andrew Lunn <andrew@lunn.ch>
Cc: brouer@redhat.com, "David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Jesper Dangaard Brouer" <hawk@kernel.org>,
"John Fastabend" <john.fastabend@gmail.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"imx@lists.linux.dev" <imx@lists.linux.dev>,
"Magnus Karlsson" <magnus.karlsson@gmail.com>,
"Björn Töpel" <bjorn@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>
Subject: Re: [EXT] Re: [PATCH 1/1] net: fec: add initial XDP support
Date: Thu, 6 Oct 2022 10:37:48 +0200 [thread overview]
Message-ID: <eb8d097b-e53b-ed09-f598-71cac24edb7c@redhat.com> (raw)
In-Reply-To: <PAXPR04MB918565DF416D879FF9232A6C895D9@PAXPR04MB9185.eurprd04.prod.outlook.com>
On 05/10/2022 14.40, Shenwei Wang wrote:
> Hi Jesper,
>
> Here is the summary of "xdp_rxq_info" testing.
>
> skb_mark_for_recycle page_pool_release_page
>
> Native SKB-Mode Native SKB-Mode
> XDP_DROP 460K 220K 460K 102K
> XDP_PASS 80K 113K 60K 62K
>
It is very pleasing to see the *huge* performance benefit that page_pool
provide when recycling pages for SKBs (via skb_mark_for_recycle).
I did expect a performance boost, but not around a x2 performance boost.
I guess this platform have a larger overhead for DMA-mapping and
page-allocation.
IMHO it would be valuable to include this result as part of the patch
description when you post the XDP patch again.
Only strange result is XDP_PASS 'Native' is slower that 'SKB-mode'. I
cannot explain why, as XDP_PASS essentially does nothing and just follow
normal driver code to netstack.
Thanks a lot for doing these tests.
--Jesper
> The following are the testing log.
>
> Thanks,
> Shenwei
>
> ### skb_mark_for_recycle solution ###
>
> ./xdp_rxq_info --dev eth0 --act XDP_DROP --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_DROP options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 466,553 0
> XDP-RX CPU total 466,553
>
> ./xdp_rxq_info -S --dev eth0 --act XDP_DROP --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_DROP options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 226,272 0
> XDP-RX CPU total 226,272
>
> ./xdp_rxq_info --dev eth0 --act XDP_PASS --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_PASS options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 80,518 0
> XDP-RX CPU total 80,518
>
> ./xdp_rxq_info -S --dev eth0 --act XDP_PASS --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_PASS options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 113,681 0
> XDP-RX CPU total 113,681
>
>
> ### page_pool_release_page solution ###
>
> ./xdp_rxq_info --dev eth0 --act XDP_DROP --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_DROP options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 463,145 0
> XDP-RX CPU total 463,145
>
> ./xdp_rxq_info -S --dev eth0 --act XDP_DROP --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_DROP options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 104,443 0
> XDP-RX CPU total 104,443
>
> ./xdp_rxq_info --dev eth0 --act XDP_PASS --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_PASS options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 60,539 0
> XDP-RX CPU total 60,539
>
> ./xdp_rxq_info -S --dev eth0 --act XDP_PASS --read
>
> Running XDP on dev:eth0 (ifindex:2) action:XDP_PASS options:read
> XDP stats CPU pps issue-pps
> XDP-RX CPU 0 62,566 0
> XDP-RX CPU total 62,566
>
>> -----Original Message-----
>> From: Shenwei Wang
>> Sent: Tuesday, October 4, 2022 8:34 AM
>> To: Jesper Dangaard Brouer <jbrouer@redhat.com>; Andrew Lunn
>> <andrew@lunn.ch>
>> Cc: brouer@redhat.com; David S. Miller <davem@davemloft.net>; Eric Dumazet
>> <edumazet@google.com>; Jakub Kicinski <kuba@kernel.org>; Paolo Abeni
>> <pabeni@redhat.com>; Alexei Starovoitov <ast@kernel.org>; Daniel Borkmann
>> <daniel@iogearbox.net>; Jesper Dangaard Brouer <hawk@kernel.org>; John
>> Fastabend <john.fastabend@gmail.com>; netdev@vger.kernel.org; linux-
>> kernel@vger.kernel.org; imx@lists.linux.dev; Magnus Karlsson
>> <magnus.karlsson@gmail.com>; Björn Töpel <bjorn@kernel.org>; Ilias
>> Apalodimas <ilias.apalodimas@linaro.org>
>> Subject: RE: [EXT] Re: [PATCH 1/1] net: fec: add initial XDP support
>>
>>
>>
>>> -----Original Message-----
>>> From: Shenwei Wang
>>> Sent: Tuesday, October 4, 2022 8:13 AM
>>> To: Jesper Dangaard Brouer <jbrouer@redhat.com>; Andrew Lunn
>> ...
>>> I haven't tested xdp_rxq_info yet, and will have a try sometime later today.
>>> However, for the XDP_DROP test, I did try xdp2 test case, and the
>>> testing result looks reasonable. The performance of Native mode is
>>> much higher than skb- mode.
>>>
>>> # xdp2 eth0
>>> proto 0: 475362 pkt/s
>>>
>>> # xdp2 -S eth0 (page_pool_release_page solution)
>>> proto 17: 71999 pkt/s
>>>
>>> # xdp2 -S eth0 (skb_mark_for_recycle solution)
>>> proto 17: 72228 pkt/s
>>>
>>
>> Correction for xdp2 -S eth0 (skb_mark_for_recycle solution)
>> proto 0: 0 pkt/s
>> proto 17: 122473 pkt/s
>>
>> Thanks,
>> Shenwei
>
next prev parent reply other threads:[~2022-10-06 8:38 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 15:25 [PATCH 1/1] net: fec: add initial XDP support Shenwei Wang
2022-09-28 21:18 ` kernel test robot
2022-09-29 1:33 ` Andrew Lunn
2022-09-29 12:40 ` [EXT] " Shenwei Wang
2022-09-29 13:22 ` Andrew Lunn
2022-09-29 13:26 ` Shenwei Wang
2022-09-29 15:19 ` Andrew Lunn
2022-09-29 15:28 ` Jesper Dangaard Brouer
2022-09-29 15:39 ` Andrew Lunn
2022-09-29 15:52 ` Shenwei Wang
2022-09-29 18:55 ` Jesper Dangaard Brouer
2022-10-03 12:49 ` Shenwei Wang
2022-10-04 11:21 ` Jesper Dangaard Brouer
2022-10-04 13:12 ` Shenwei Wang
2022-10-04 13:34 ` Shenwei Wang
2022-10-05 12:40 ` Shenwei Wang
2022-10-06 8:37 ` Jesper Dangaard Brouer [this message]
2022-10-07 8:08 ` Ilias Apalodimas
2022-10-07 19:18 ` Shenwei Wang
2022-09-29 1:50 ` Andrew Lunn
2022-09-29 12:46 ` [EXT] " Shenwei Wang
2022-09-29 13:24 ` Andrew Lunn
2022-09-29 13:35 ` Shenwei Wang
2022-09-29 2:43 ` kernel test robot
2022-09-29 10:16 ` Jesper Dangaard Brouer
2022-09-29 13:11 ` [EXT] " Shenwei Wang
2022-09-29 15:44 ` Jesper Dangaard Brouer
2022-10-03 5:41 ` kernel test robot
2022-10-25 20:11 Shenwei Wang
2022-10-25 22:08 ` Andrew Lunn
2022-10-27 1:50 ` [EXT] " Shenwei Wang
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