linux-kernel - RE: [bpf?] [net?] Questions about the impact of ebpf sockmap/redirection on socket performance improvement

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Message-ID: <647056d28d59a_2023020887@john.notmuch>
Date:   Thu, 25 May 2023 23:50:58 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     kongweibin <kongweibin2@...wei.com>, daniel@...earbox.net
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        davem@...emloft.net, edumazet@...gle.com, hsinweih@....edu,
        jakub@...udflare.com, john.fastabend@...il.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, liuxin350@...wei.com,
        yanan@...wei.com, wuchangye@...wei.com, xiesongyang@...wei.com,
        kongweibin2@...wei.com, zhangmingyi5@...wei.com
Subject: RE: [bpf?] [net?] Questions about the impact of ebpf
 sockmap/redirection on socket performance improvement

kongweibin wrote:
> I'm using ebpf sockmap/redirection to bypass the TCP/IP stack to improve
> socket communication performance (throughput, latency) between different
> PODs on the same machine. As concurrent connections or payloads increase,
> there may be unconspicuous performance improvement or even performance
> degradation compared to the TCP/IP stack. I have retrieved some performance
> data, but it does not seem to involve high concurrency and high payloads,
> I would like to know if community have conducted relevant tests on these
> scenarios and have any opinions on the poor performance improvement in these
> scenarios.

Not fully following above, what is your performance test/tools and what
were the numbers?