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From: "Thomas Rosenstein" <thomas.rosenstein@creamfinance.com>
To: "Jesper Dangaard Brouer" <brouer@redhat.com>
Cc: Bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Router congestion, slow ping/ack times with kernel 5.4.60
Date: Sat, 07 Nov 2020 18:01:03 +0100	[thread overview]
Message-ID: <DDBB1D83-1588-4001-BF12-26BCEF53AE56@creamfinance.com> (raw)
In-Reply-To: <20201107174623.73f91841@carbon>



On 7 Nov 2020, at 17:46, Jesper Dangaard Brouer wrote:

>
> Did the latency issue happen during this this perf recording?
> (it is obviously important that you record during the issue)

yes it was recorded during the transfer, while it exhibited the issue

I let the transfer run some time, then did the perf extract, stopped the 
transfer afterwards.

>
> Finding a single latency event/issue in perf.data is like looking in
> for needle in a haystack.  It does give hints and e.g. tell me details
> like what part of the kernel are used/activated.
>
> I can see that you have likely configured XPS (Transmit Packet
> Steering). Is this on purpose?

Not on purpose, I assume it comes from the Mellanox Card.

>
> -- 
> Best regards,
>   Jesper Dangaard Brouer
>   MSc.CS, Principal Kernel Engineer at Red Hat
>   LinkedIn: http://www.linkedin.com/in/brouer

  reply	other threads:[~2020-11-07 17:01 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-04 15:23 Thomas Rosenstein
2020-11-04 16:10 ` Toke Høiland-Jørgensen
2020-11-04 16:24   ` Thomas Rosenstein
2020-11-05  0:10     ` Toke Høiland-Jørgensen
2020-11-05  8:48       ` Thomas Rosenstein
2020-11-05 11:21         ` Toke Høiland-Jørgensen
2020-11-05 12:22           ` Thomas Rosenstein
2020-11-05 12:38             ` Toke Høiland-Jørgensen
2020-11-05 12:41               ` Thomas Rosenstein
2020-11-05 12:47                 ` Toke Høiland-Jørgensen
2020-11-05 13:33             ` Jesper Dangaard Brouer
2020-11-06  8:48               ` Thomas Rosenstein
2020-11-06 10:53                 ` Jesper Dangaard Brouer
2020-11-06  9:18               ` Thomas Rosenstein
2020-11-06 11:18                 ` Jesper Dangaard Brouer
2020-11-06 11:37                   ` Thomas Rosenstein
2020-11-06 11:45                     ` Toke Høiland-Jørgensen
2020-11-06 12:01                       ` Thomas Rosenstein
2020-11-06 12:53                       ` Jesper Dangaard Brouer
2020-11-06 14:13                         ` Jesper Dangaard Brouer
2020-11-06 17:04                           ` Thomas Rosenstein
2020-11-06 20:19                             ` Jesper Dangaard Brouer
2020-11-07 12:37                               ` Thomas Rosenstein
2020-11-07 12:40                                 ` Jan Ceuleers
2020-11-07 12:43                                   ` Thomas Rosenstein
2020-11-07 13:00                                   ` Thomas Rosenstein
2020-11-09  8:24                                     ` Jesper Dangaard Brouer
2020-11-09 10:09                                       ` Thomas Rosenstein
2020-11-09 11:40                                         ` Jesper Dangaard Brouer
2020-11-09 11:51                                           ` Toke Høiland-Jørgensen
2020-11-09 12:25                                           ` Thomas Rosenstein
2020-11-09 14:33                                           ` Thomas Rosenstein
2020-11-12 10:05                                             ` Jesper Dangaard Brouer
2020-11-12 11:26                                               ` Thomas Rosenstein
2020-11-12 13:31                                                 ` Jesper Dangaard Brouer
2020-11-12 13:42                                                   ` Thomas Rosenstein
2020-11-12 15:42                                                     ` Jesper Dangaard Brouer
2020-11-13  6:31                                                       ` Thomas Rosenstein
2020-11-16 11:56                                                         ` Jesper Dangaard Brouer
2020-11-16 12:05                                                           ` Thomas Rosenstein
2020-11-09 16:39                                           ` Thomas Rosenstein
2020-11-07 13:33                                 ` Thomas Rosenstein
2020-11-07 16:46                                 ` Jesper Dangaard Brouer
2020-11-07 17:01                                   ` Thomas Rosenstein [this message]
2020-11-07 17:26                                     ` Sebastian Moeller
2020-11-16 12:34 ` Jesper Dangaard Brouer
2020-11-16 12:49   ` Thomas Rosenstein

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