netdev - RE: [PATCH bpf-next v3 09/10] selftests/bpf: Add TX side to xdp_hw

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Date: Sun, 15 Oct 2023 13:28:40 +0000
From: "Song, Yoong Siang" <yoong.siang.song@...el.com>
To: Stanislav Fomichev <sdf@...gle.com>
CC: Jesper Dangaard Brouer <hawk@...nel.org>, "bpf@...r.kernel.org"
	<bpf@...r.kernel.org>, "ast@...nel.org" <ast@...nel.org>,
	"daniel@...earbox.net" <daniel@...earbox.net>, "andrii@...nel.org"
	<andrii@...nel.org>, "martin.lau@...ux.dev" <martin.lau@...ux.dev>,
	"song@...nel.org" <song@...nel.org>, "yhs@...com" <yhs@...com>,
	"john.fastabend@...il.com" <john.fastabend@...il.com>, "kpsingh@...nel.org"
	<kpsingh@...nel.org>, "haoluo@...gle.com" <haoluo@...gle.com>,
	"jolsa@...nel.org" <jolsa@...nel.org>, "kuba@...nel.org" <kuba@...nel.org>,
	"toke@...nel.org" <toke@...nel.org>, "willemb@...gle.com"
	<willemb@...gle.com>, "dsahern@...nel.org" <dsahern@...nel.org>, "Karlsson,
 Magnus" <magnus.karlsson@...el.com>, "bjorn@...nel.org" <bjorn@...nel.org>,
	"Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"xdp-hints@...-project.net" <xdp-hints@...-project.net>
Subject: RE: [PATCH bpf-next v3 09/10] selftests/bpf: Add TX side to
 xdp_hw_metadata

On Saturday, October 14, 2023 2:48 AM Stanislav Fomichev <sdf@...gle.com> wrote:
>On Thu, Oct 12, 2023 at 6:14 PM Song, Yoong Siang <yoong.siang.song@...el.com> wrote:
[...]
>> So,  I suggest to change the naming:
>>  - HW RX-time: the moment NIC receive the packet (based on PHC)
>>  - XDP RX-time: the moment bpf prog parse the packet (based on tai)
>>  - SW RX-time: the moment user app receive the packet (based on tai)
>>  - HW TX-complete-time: the moment NIC send out the packet (based on
>> PHC)
>>  - SW TX-complete-time:  the moment user app know the packet being
>> send out (based on tai)
>
>SG. Maybe also do s/SW/User/ ? To signify that it's a userspace-level timestamps?

sound good.

>
>> Thanks & Regards
>> Siang
>>