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From: Yahui Chen <goodluckwillcomesoon@gmail.com>
To: "bpf@vger.kernel.org" <bpf@vger.kernel.org>
Subject: Talk about AF_XDP support multithread concurrently receive packet
Date: Tue, 23 Jun 2020 14:20:27 +0800	[thread overview]
Message-ID: <CAPydje97m+hG3_Cqg560uHoq8aKG9eDpTHA1eJC=hLuKtMf_vw@mail.gmail.com> (raw)

I have make an issue for the libbpf in github, issue number 163.

Andrii suggest me sending a mail here. So ,I paste out the content of the issue:

Currently, libbpf do not support concurrently receive pkts using AF_XDP.

For example: I create 4 af_xdp sockets on nic's ring 0. Four sockets
receiving packets concurrently can't work correctly because the API of
cq `xsk_ring_prod__reserve` and `xsk_ring_prod__submit` don't support
concurrence.

So, my question is why libbpf was designed non-concurrent mode, is the
limit of kernel or other reason? I want to change the code to support
concurrent receive pkts, therefore I want to find out whether this is
theoretically supported.

Thx.

             reply	other threads:[~2020-06-23  6:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23  6:20 Yahui Chen [this message]
2020-06-23  7:27 ` Talk about AF_XDP support multithread concurrently receive packet Björn Töpel
2020-06-23 11:27   ` Yahui Chen

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