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From: Sagi Grimberg <sagi@grimberg.me>
To: Yi Zhang <yi.zhang@redhat.com>,
	Max Gurtovoy <mgurtovoy@nvidia.com>,
	Max Gurtovoy <maxg@mellanox.com>
Cc: "open list:NVM EXPRESS DRIVER" <linux-nvme@lists.infradead.org>,
	RDMA mailing list <linux-rdma@vger.kernel.org>
Subject: Re: [bug report] NVMe/IB: reset_controller need more than 1min
Date: Wed, 16 Mar 2022 17:16:09 +0200	[thread overview]
Message-ID: <6d8f4525-f663-18cc-8644-bfddd7d86bd0@grimberg.me> (raw)
In-Reply-To: <CAHj4cs_ir917u7Up5PBfwWpZtnVLey69pXXNjFNAjbqQ5vwU0w@mail.gmail.com>


>> Hi Yi Zhang,
>>
>> thanks for testing the patches.
>>
>> Can you provide more info on the time it took with both kernels ?
> 
> Hi Max
> Sorry for the late response, here are the test results/dmesg on
> debug/non-debug kernel with your patch:
> debug kernel: timeout
> # time nvme connect -t rdma -a 172.31.0.202 -s 4420 -n testnqn
> real    0m16.956s
> user    0m0.000s
> sys     0m0.237s
> # time nvme reset /dev/nvme0
> real    1m33.623s
> user    0m0.000s
> sys     0m0.024s
> # time nvme disconnect-all
> real    1m26.640s
> user    0m0.000s
> sys     0m9.969s
> 
> host dmesg:
> https://pastebin.com/8T3Lqtkn
> target dmesg:
> https://pastebin.com/KpFP7xG2
> 
> non-debug kernel: no timeout issue, but still 12s for reset, and 8s
> for disconnect
> host:
> # time nvme connect -t rdma -a 172.31.0.202 -s 4420 -n testnqn
> 
> real    0m4.579s
> user    0m0.000s
> sys     0m0.004s
> # time nvme reset /dev/nvme0
> 
> real    0m12.778s
> user    0m0.000s
> sys     0m0.006s
> # time nvme reset /dev/nvme0
> 
> real    0m12.793s
> user    0m0.000s
> sys     0m0.006s
> # time nvme reset /dev/nvme0
> 
> real    0m12.808s
> user    0m0.000s
> sys     0m0.006s
> # time nvme disconnect-all
> 
> real    0m8.348s
> user    0m0.000s
> sys     0m0.189s

These are very long times for a non-debug kernel...
Max, do you see the root cause for this?

Yi, does this happen with rxe/siw as well?

  reply	other threads:[~2022-03-16 15:16 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 16:12 [bug report] NVMe/IB: reset_controller need more than 1min Yi Zhang
2021-05-21 16:12 ` Yi Zhang
2021-05-21 18:00 ` Sagi Grimberg
2021-05-21 18:00   ` Sagi Grimberg
2021-05-22  4:27   ` Yi Zhang
2021-05-22  4:27     ` Yi Zhang
2021-06-23 10:01     ` Yi Zhang
2021-06-23 10:01       ` Yi Zhang
2021-06-23 21:32       ` Sagi Grimberg
2021-06-23 21:32         ` Sagi Grimberg
2021-06-24 16:14         ` Yi Zhang
2021-06-24 16:14           ` Yi Zhang
2021-12-11  3:01           ` Yi Zhang
2021-12-12  9:45             ` Sagi Grimberg
2021-12-13  6:12               ` Yi Zhang
2021-12-13  9:04                 ` Sagi Grimberg
2021-12-13 17:05                   ` Yi Zhang
2021-12-14 10:39                     ` Sagi Grimberg
2021-12-14 12:00                       ` Max Gurtovoy
2021-12-15  1:15                         ` Yi Zhang
2021-12-15 12:10                           ` Max Gurtovoy
2021-12-16  2:18                             ` Yi Zhang
2021-12-16 13:21                               ` Max Gurtovoy
2021-12-16 16:32                                 ` Yi Zhang
2021-12-16 17:33                                   ` Haakon Bugge
2021-12-17  7:03                                     ` Yi Zhang
2021-12-17 11:19                                       ` Haakon Bugge
2022-02-14  9:47                                         ` Yi Zhang
2022-02-14 11:00                                           ` Chaitanya Kulkarni
2022-02-14 11:32                                           ` Sagi Grimberg
2022-02-14 12:11                                             ` Max Gurtovoy
2022-02-15 13:52                                               ` Yi Zhang
2022-02-15 14:30                                                 ` Max Gurtovoy
2022-02-21 10:00                                                   ` Yi Zhang
2022-02-23 10:04                                                     ` Max Gurtovoy
2022-02-23 10:30                                                       ` Sagi Grimberg
2022-02-23 11:20                                                         ` Max Gurtovoy
2022-03-01  0:06                                                       ` Yi Zhang
2022-03-16 15:16                                                         ` Sagi Grimberg [this message]
2022-03-19  7:29                                                           ` Yi Zhang
2022-03-20 10:50                                                             ` Max Gurtovoy
2022-03-20 13:03                                                               ` Sagi Grimberg
2022-03-20 15:11                                                                 ` Max Gurtovoy
2022-03-21  9:28                                                                   ` Sagi Grimberg
2022-03-21 12:11                                                                     ` Max Gurtovoy

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