freebsd-arm Digest, Vol 740, Issue 7 (Rock64 Ethernet testing)
Mark Millard
marklmi at yahoo.com
Wed Jul 8 04:52:22 UTC 2020
On 2020-Jul-7, at 19:12, Oleksandr Tymoshenko <gonzo at bluezbox.com> wrote:
> Mark Millard (marklmi at yahoo.com) wrote:
>> Any chance that the delays (or other parameters) depend
>> on the operating temperature(s) of some parts?
>>
>> If yes, then some of the following about the Rock64 V2
>> context that I have access to might be relevant to
>> explaining my already reported V2 results (not much
>> for Retr):
>>
>> A) The Rock64 has a "case" that is really just a top
>> and a bottom with posts: open on all 4 sides.
>>
>> B) It has a fan blowing down on the board from the
>> top.
>>
>> C) It has a heat sink on the SOC, which the fan blows
>> on directly.
>>
>> D) It has a heat sink on the RAM, which the fan also
>> blows on directly.
>>
>> (I've not dealt with a more modern non-debug kernel
>> build yet. It still may be some time before I deal
>> with that.)
>
> Temperature is not likely to be a factor in the delay values.
> Rock64 V2 has a known issue with Gigabit ethernet stability:
>
> https://forum.pine64.org/showthread.php?tid=7545
> https://sanisimov.com/2019/08/fixing-rock64-v2-gigabit-ethernet/
>
> Althought judging by description it's more like an almost complete
> network lock-up and not performance degradation.
>
> I received another board with RK3328 today and will investigate
> the issue further.
Okay.
Looks like I should have copied iperf3 output from the server
side as well: somewhat different information. The output was
still available from the earlier runs so here it is . . .
The modern debug-kernel runs:
Accepted connection from 192.168.1.109, port 47111
[ 5] local 192.168.1.122 port 5201 connected to 192.168.1.109 port 17015
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 17.5 MBytes 147 Mbits/sec
[ 5] 1.00-2.00 sec 45.3 MBytes 380 Mbits/sec
[ 5] 2.00-3.00 sec 44.9 MBytes 376 Mbits/sec
[ 5] 3.00-4.00 sec 45.2 MBytes 379 Mbits/sec
[ 5] 4.00-5.00 sec 44.9 MBytes 377 Mbits/sec
[ 5] 5.00-6.00 sec 45.1 MBytes 379 Mbits/sec
[ 5] 6.00-7.00 sec 44.5 MBytes 373 Mbits/sec
[ 5] 7.00-8.00 sec 45.0 MBytes 378 Mbits/sec
[ 5] 8.00-9.00 sec 44.9 MBytes 377 Mbits/sec
[ 5] 9.00-10.00 sec 44.5 MBytes 373 Mbits/sec
[ 5] 10.00-10.62 sec 27.9 MBytes 379 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.62 sec 450 MBytes 355 Mbits/sec receiver
Accepted connection from 192.168.1.109, port 22375
[ 5] local 192.168.1.122 port 5201 connected to 192.168.1.109 port 54738
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 24.7 MBytes 207 Mbits/sec 0 265 KBytes
[ 5] 1.00-2.00 sec 61.6 MBytes 517 Mbits/sec 4 211 KBytes
[ 5] 2.00-3.00 sec 61.4 MBytes 515 Mbits/sec 1 352 KBytes
[ 5] 3.00-4.00 sec 61.3 MBytes 514 Mbits/sec 4 269 KBytes
[ 5] 4.00-5.00 sec 61.4 MBytes 515 Mbits/sec 2 355 KBytes
[ 5] 5.00-6.00 sec 61.3 MBytes 514 Mbits/sec 3 304 KBytes
[ 5] 6.00-7.00 sec 61.3 MBytes 514 Mbits/sec 2 327 KBytes
[ 5] 7.00-8.00 sec 61.4 MBytes 515 Mbits/sec 5 278 KBytes
[ 5] 8.00-9.00 sec 61.4 MBytes 515 Mbits/sec 2 393 KBytes
[ 5] 9.00-10.00 sec 61.4 MBytes 515 Mbits/sec 3 284 KBytes
[ 5] 10.00-10.61 sec 37.3 MBytes 514 Mbits/sec 2 282 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.61 sec 614 MBytes 486 Mbits/sec 28 sender
(So a fairly consistent Retr rate.)
The non-debug head -r360311 kernel runs:
Accepted connection from 192.168.1.109, port 46431
[ 5] local 192.168.1.122 port 5201 connected to 192.168.1.109 port 39541
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 50.3 MBytes 422 Mbits/sec
[ 5] 1.00-2.00 sec 72.7 MBytes 610 Mbits/sec
[ 5] 2.00-3.00 sec 72.9 MBytes 611 Mbits/sec
[ 5] 3.00-4.00 sec 72.8 MBytes 611 Mbits/sec
[ 5] 4.00-5.00 sec 72.9 MBytes 611 Mbits/sec
[ 5] 5.00-6.00 sec 72.9 MBytes 611 Mbits/sec
[ 5] 6.00-7.00 sec 72.8 MBytes 611 Mbits/sec
[ 5] 7.00-8.00 sec 72.8 MBytes 610 Mbits/sec
[ 5] 8.00-9.00 sec 72.8 MBytes 610 Mbits/sec
[ 5] 9.00-10.00 sec 72.8 MBytes 610 Mbits/sec
[ 5] 10.00-10.32 sec 23.4 MBytes 612 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.32 sec 729 MBytes 593 Mbits/sec receiver
Accepted connection from 192.168.1.109, port 40223
[ 5] local 192.168.1.122 port 5201 connected to 192.168.1.109 port 50696
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 78.5 MBytes 659 Mbits/sec 0 480 KBytes
[ 5] 1.00-2.00 sec 113 MBytes 945 Mbits/sec 0 747 KBytes
[ 5] 2.00-3.00 sec 112 MBytes 941 Mbits/sec 0 940 KBytes
[ 5] 3.00-4.00 sec 84.5 MBytes 709 Mbits/sec 52 368 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 941 Mbits/sec 0 681 KBytes
[ 5] 5.00-6.00 sec 112 MBytes 941 Mbits/sec 0 889 KBytes
[ 5] 6.00-7.00 sec 112 MBytes 942 Mbits/sec 0 1.03 MBytes
[ 5] 7.00-8.00 sec 112 MBytes 942 Mbits/sec 0 1.17 MBytes
[ 5] 8.00-9.00 sec 112 MBytes 941 Mbits/sec 0 125 KBytes
[ 5] 9.00-10.00 sec 112 MBytes 941 Mbits/sec 3 586 KBytes
[ 5] 10.00-10.31 sec 34.7 MBytes 942 Mbits/sec 0 667 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.31 sec 1.07 GBytes 892 Mbits/sec 55 sender
So: Larger total Retr than the modern debug kernel case
but not a fairly consistent rate of Retr values.
I've still not dealt with updating to a modern non-debug
environment to test it.
===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
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