From: Jakub Kicinski <kuba@kernel.org>
To: Jason Xing <kerneljasonxing@gmail.com>
Cc: davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
bjorn@kernel.org, magnus.karlsson@intel.com,
maciej.fijalkowski@intel.com, jonathan.lemon@gmail.com,
sdf@fomichev.me, ast@kernel.org, daniel@iogearbox.net,
hawk@kernel.org, john.fastabend@gmail.com, horms@kernel.org,
andrew+netdev@lunn.ch, bpf@vger.kernel.org,
netdev@vger.kernel.org, Jason Xing <kernelxing@tencent.com>
Subject: Re: [PATCH net-next v2 0/9] xsk: improvement performance in copy mode
Date: Mon, 25 Aug 2025 17:29:28 -0700 [thread overview]
Message-ID: <20250825172928.234fd75c@kernel.org> (raw)
In-Reply-To: <CAL+tcoCxzyBxhCes-4OfBAePpQK3jvSRSBufo0eu6afb4hdSaA@mail.gmail.com>
On Tue, 26 Aug 2025 08:01:03 +0800 Jason Xing wrote:
> On Tue, Aug 26, 2025 at 1:44 AM Jakub Kicinski <kuba@kernel.org> wrote:
> > On Mon, 25 Aug 2025 21:53:33 +0800 Jason Xing wrote:
> > > copy mode: 1,109,754 pps
> > > batch mode: 2,393,498 pps (+115.6%)
> > > xmit.more: 3,024,110 pps (+172.5%)
> > > zc mode: 14,879,414 pps
> >
> > I've asked you multiple times to add comparison with the performance
> > of AF_PACKET. What's the disconnect?
>
> Sorry for missing the question. I'm not very familiar with how to run the
> test based on AF_PACKET. Could you point it out for me? Thanks.
>
> I remember the very initial version of AF_XDP was pure AF_PACKET. So
> may I ask why we expect to see the comparison between them?
Pretty sure I told you this at least twice but the point of AF_XDP
is the ZC mode. Without a comparison to AF_PACKET which has similar
functionality optimizing AF_XDP copy mode seems unjustified.
next prev parent reply other threads:[~2025-08-26 0:29 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-25 13:53 [PATCH net-next v2 0/9] xsk: improvement performance in copy mode Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 1/9] xsk: introduce XDP_GENERIC_XMIT_BATCH setsockopt Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 2/9] xsk: add descs parameter in xskq_cons_read_desc_batch() Jason Xing
2025-08-25 21:18 ` Maciej Fijalkowski
2025-08-26 0:10 ` Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 3/9] xsk: introduce locked version of xskq_prod_write_addr_batch Jason Xing
2025-08-25 21:42 ` Maciej Fijalkowski
2025-08-26 0:13 ` Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 4/9] xsk: extend xsk_build_skb() to support passing an already allocated skb Jason Xing
2025-08-25 21:49 ` Maciej Fijalkowski
2025-08-26 0:26 ` Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 5/9] xsk: add xsk_alloc_batch_skb() to build skbs in batch Jason Xing
2025-08-25 16:56 ` kernel test robot
2025-08-27 14:32 ` Alexander Lobakin
2025-08-28 0:38 ` Jason Xing
2025-08-28 15:28 ` Alexander Lobakin
2025-08-29 0:31 ` Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 6/9] xsk: add direct xmit in batch function Jason Xing
2025-08-25 17:34 ` Stanislav Fomichev
2025-08-26 0:27 ` Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 7/9] xsk: support batch xmit main logic Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 8/9] xsk: support generic batch xmit in copy mode Jason Xing
2025-08-25 13:53 ` [PATCH net-next v2 9/9] xsk: support dynamic xmit.more control for batch xmit Jason Xing
2025-08-25 17:44 ` [PATCH net-next v2 0/9] xsk: improvement performance in copy mode Jakub Kicinski
2025-08-26 0:01 ` Jason Xing
2025-08-26 0:29 ` Jakub Kicinski [this message]
2025-08-26 0:51 ` Jason Xing
2025-08-26 1:15 ` Jakub Kicinski
2025-08-26 1:49 ` Jason Xing
2025-08-25 21:15 ` Maciej Fijalkowski
2025-08-26 0:06 ` Jason Xing
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