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From: Cong Wang <xiyou.wangcong@gmail.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: "sunyucong@gmail.com" <sunyucong@gmail.com>,
	Jiang Wang <jiang.wang@bytedance.com>,
	Cong Wang <cong.wang@bytedance.com>,
	Yucong Sun <fallentree@fb.com>,
	Andrii Nakryiko <andrii@kernel.org>, bpf <bpf@vger.kernel.org>
Subject: Re: [PATCH bpf-next] selftests/bpf: reduce more flakyness in sockmap_listen
Date: Wed, 1 Sep 2021 18:33:07 -0700	[thread overview]
Message-ID: <CAM_iQpUG30QL03Uh9D_ACy_29TLWG+YfDO9_GvcqzW2f0TbpYw@mail.gmail.com> (raw)
In-Reply-To: <CAM_iQpVw-5dG8Na9e851bQy2_BcpZQ5QK+r554NZsP0_dbzwNw@mail.gmail.com>

On Tue, Aug 31, 2021 at 12:33 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
> Like I mentioned before, I suspect there is some delay in one of
> the queues on the way or there is a worker wakeup latency.
> I will try adding some tracepoints to see if I can capture it.

I tried to revert this patch locally to reproduce the EAGAIN
failure, but even after repeating the sockmap_listen test hundreds
of times, I didn't see any failure here.

If you are still interested in this issue, I'd suggest you adding some
tracepoints to see what happens to kworker or the packet queues.

It does not look like a sockmap bug, otherwise I would be able to
reproduce it here.


  reply	other threads:[~2021-09-02  1:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25 18:47 [PATCH bpf-next] selftests/bpf: reduce more flakyness in sockmap_listen Yucong Sun
2021-08-26  1:04 ` Alexei Starovoitov
2021-08-26  2:37   ` sunyucong
2021-08-26 18:18     ` sunyucong
2021-08-26 19:07       ` Alexei Starovoitov
2021-08-26 19:23         ` sunyucong
2021-08-26 21:05           ` Alexei Starovoitov
2021-08-26 21:07             ` sunyucong
2021-08-31 19:33         ` Cong Wang
2021-09-02  1:33           ` Cong Wang [this message]
2021-09-02  3:34             ` sunyucong
2021-09-03 23:44               ` Cong Wang
2021-09-07  2:24                 ` sunyucong
2021-09-15 14:13                   ` sunyucong
2021-09-15 16:54                   ` Cong Wang

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