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Date:      Thu, 9 Jul 2020 00:22:36 -0700
From:      Mark Millard <marklmi@yahoo.com>
To:        Oleksandr Tymoshenko <gonzo@bluezbox.com>
Cc:        Peter Jeremy <peter@rulingia.com>, freebsd-arm <freebsd-arm@freebsd.org>
Subject:   Re: freebsd-arm Digest, Vol 740, Issue 7 (Rock64 Ethernet testing)
Message-ID:  <A6BC3912-4CDA-4ABF-8354-921DA854A2C5@yahoo.com>
In-Reply-To: <4AA1D1FD-F9A4-400E-80FA-C1888F399602@yahoo.com>
References:  <mailman.75.1593950402.45034.freebsd-arm@freebsd.org> <1731fbded28.10a3342f0357159.8148813293316485882@fkardame.com> <20200706204707.GA94158@bluezbox.com> <0A2E974E-39D3-46C8-8791-3BD914EBE7E9@yahoo.com> <0C77695E-A9D0-410A-B105-5B69823E17E2@yahoo.com> <EB92D6CC-940A-4429-A257-7D17955B8379@yahoo.com> <EFA17CEC-A2A2-4B0D-B63F-DB4E98CB2672@yahoo.com> <3289DA3D-03FB-43BD-9A6A-956AC0A03B59@yahoo.com> <20200708021226.GA77884@bluezbox.com> <CC52258E-513F-438F-A634-21FFA35CEA45@yahoo.com> <4AA1D1FD-F9A4-400E-80FA-C1888F399602@yahoo.com>

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On 2020-Jul-8, at 00:27, Mark Millard <marklmi at yahoo.com> wrote:

> On 2020-Jul-7, at 21:52, Mark Millard <marklmi at yahoo.com> wrote:
>=20
>> On 2020-Jul-7, at 19:12, Oleksandr Tymoshenko <gonzo at bluezbox.com> =
wrote:
>>=20
>>> Mark Millard (marklmi at yahoo.com) wrote:
>>>> Any chance that the delays (or other parameters) depend
>>>> on the operating temperature(s) of some parts?
>>>>=20
>>>> 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):
>>>>=20
>>>> A) The Rock64 has a "case" that is really just a top
>>>> and a bottom with posts: open on all 4 sides.
>>>>=20
>>>> B) It has a fan blowing down on the board from the
>>>> top.
>>>>=20
>>>> C) It has a heat sink on the SOC, which the fan blows
>>>> on directly.
>>>>=20
>>>> D) It has a heat sink on the RAM, which the fan also
>>>> blows on directly.
>>>>=20
>>>> (I've not dealt with a more modern non-debug kernel
>>>> build yet. It still may be some time before I deal
>>>> with that.)
>>>=20
>>> Temperature is not likely to be a factor in the delay values.
>>> Rock64 V2 has a known issue with Gigabit ethernet stability:
>>>=20
>>> https://forum.pine64.org/showthread.php?tid=3D7545
>>> https://sanisimov.com/2019/08/fixing-rock64-v2-gigabit-ethernet/
>>>=20
>>> Althought judging by description it's more like an almost complete
>>> network lock-up and not performance degradation.
>>>=20
>>> I received another board with RK3328 today and will investigate
>>> the issue further.
>>=20
>> Okay.
>>=20
>> 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 . . .
>>=20
>> The modern debug-kernel runs:
>>=20
>> 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                 =20=

>> [  5]   1.00-2.00   sec  45.3 MBytes   380 Mbits/sec                 =20=

>> [  5]   2.00-3.00   sec  44.9 MBytes   376 Mbits/sec                 =20=

>> [  5]   3.00-4.00   sec  45.2 MBytes   379 Mbits/sec                 =20=

>> [  5]   4.00-5.00   sec  44.9 MBytes   377 Mbits/sec                 =20=

>> [  5]   5.00-6.00   sec  45.1 MBytes   379 Mbits/sec                 =20=

>> [  5]   6.00-7.00   sec  44.5 MBytes   373 Mbits/sec                 =20=

>> [  5]   7.00-8.00   sec  45.0 MBytes   378 Mbits/sec                 =20=

>> [  5]   8.00-9.00   sec  44.9 MBytes   377 Mbits/sec                 =20=

>> [  5]   9.00-10.00  sec  44.5 MBytes   373 Mbits/sec                 =20=

>> [  5]  10.00-10.62  sec  27.9 MBytes   379 Mbits/sec                 =20=

>> - - - - - - - - - - - - - - - - - - - - - - - - -
>> [ ID] Interval           Transfer     Bitrate
>> [  5]   0.00-10.62  sec   450 MBytes   355 Mbits/sec                  =
receiver
>>=20
>> 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      =20
>> [  5]   1.00-2.00   sec  61.6 MBytes   517 Mbits/sec    4    211 =
KBytes      =20
>> [  5]   2.00-3.00   sec  61.4 MBytes   515 Mbits/sec    1    352 =
KBytes      =20
>> [  5]   3.00-4.00   sec  61.3 MBytes   514 Mbits/sec    4    269 =
KBytes      =20
>> [  5]   4.00-5.00   sec  61.4 MBytes   515 Mbits/sec    2    355 =
KBytes      =20
>> [  5]   5.00-6.00   sec  61.3 MBytes   514 Mbits/sec    3    304 =
KBytes      =20
>> [  5]   6.00-7.00   sec  61.3 MBytes   514 Mbits/sec    2    327 =
KBytes      =20
>> [  5]   7.00-8.00   sec  61.4 MBytes   515 Mbits/sec    5    278 =
KBytes      =20
>> [  5]   8.00-9.00   sec  61.4 MBytes   515 Mbits/sec    2    393 =
KBytes      =20
>> [  5]   9.00-10.00  sec  61.4 MBytes   515 Mbits/sec    3    284 =
KBytes      =20
>> [  5]  10.00-10.61  sec  37.3 MBytes   514 Mbits/sec    2    282 =
KBytes      =20
>> - - - - - - - - - - - - - - - - - - - - - - - - -
>> [ ID] Interval           Transfer     Bitrate         Retr
>> [  5]   0.00-10.61  sec   614 MBytes   486 Mbits/sec   28             =
sender
>>=20
>> (So a fairly consistent Retr rate.)
>>=20
>> The non-debug head -r360311 kernel runs:
>>=20
>> 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                 =20=

>> [  5]   1.00-2.00   sec  72.7 MBytes   610 Mbits/sec                 =20=

>> [  5]   2.00-3.00   sec  72.9 MBytes   611 Mbits/sec                 =20=

>> [  5]   3.00-4.00   sec  72.8 MBytes   611 Mbits/sec                 =20=

>> [  5]   4.00-5.00   sec  72.9 MBytes   611 Mbits/sec                 =20=

>> [  5]   5.00-6.00   sec  72.9 MBytes   611 Mbits/sec                 =20=

>> [  5]   6.00-7.00   sec  72.8 MBytes   611 Mbits/sec                 =20=

>> [  5]   7.00-8.00   sec  72.8 MBytes   610 Mbits/sec                 =20=

>> [  5]   8.00-9.00   sec  72.8 MBytes   610 Mbits/sec                 =20=

>> [  5]   9.00-10.00  sec  72.8 MBytes   610 Mbits/sec                 =20=

>> [  5]  10.00-10.32  sec  23.4 MBytes   612 Mbits/sec                 =20=

>> - - - - - - - - - - - - - - - - - - - - - - - - -
>> [ ID] Interval           Transfer     Bitrate
>> [  5]   0.00-10.32  sec   729 MBytes   593 Mbits/sec                  =
receiver
>>=20
>> 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      =20
>> [  5]   1.00-2.00   sec   113 MBytes   945 Mbits/sec    0    747 =
KBytes      =20
>> [  5]   2.00-3.00   sec   112 MBytes   941 Mbits/sec    0    940 =
KBytes      =20
>> [  5]   3.00-4.00   sec  84.5 MBytes   709 Mbits/sec   52    368 =
KBytes      =20
>> [  5]   4.00-5.00   sec   112 MBytes   941 Mbits/sec    0    681 =
KBytes      =20
>> [  5]   5.00-6.00   sec   112 MBytes   941 Mbits/sec    0    889 =
KBytes      =20
>> [  5]   6.00-7.00   sec   112 MBytes   942 Mbits/sec    0   1.03 =
MBytes      =20
>> [  5]   7.00-8.00   sec   112 MBytes   942 Mbits/sec    0   1.17 =
MBytes      =20
>> [  5]   8.00-9.00   sec   112 MBytes   941 Mbits/sec    0    125 =
KBytes      =20
>> [  5]   9.00-10.00  sec   112 MBytes   941 Mbits/sec    3    586 =
KBytes      =20
>> [  5]  10.00-10.31  sec  34.7 MBytes   942 Mbits/sec    0    667 =
KBytes      =20
>> - - - - - - - - - - - - - - - - - - - - - - - - -
>> [ ID] Interval           Transfer     Bitrate         Retr
>> [  5]   0.00-10.31  sec  1.07 GBytes   892 Mbits/sec   55             =
sender
>>=20
>> So: Larger total Retr than the modern debug kernel case
>> but not a fairly consistent rate of Retr values.
>>=20
>>=20
>> I've still not dealt with updating to a modern non-debug
>> environment to test it.
>>=20
>=20
> Turns out that I get non-zero Retr values between
> any two machines that I try, even when both are not
> arm at all.
>=20
> For example, between a PowerMac G5 (2 sockets, 2 cores each,
> powerpc64) and a Threadripper 1950X (amd64), Both are Gbps=20
> capable . . .
>=20
> FBSDG5L2# iperf3 -c 192.168.1.120
> Connecting to host 192.168.1.120, port 5201
> [  5] local 192.168.1.7 port 17239 connected to 192.168.1.120 port =
5201
> [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
> [  5]   0.00-1.00   sec   113 MBytes   946 Mbits/sec    0    489 =
KBytes      =20
> [  5]   1.00-2.00   sec   113 MBytes   944 Mbits/sec    0    730 =
KBytes      =20
> [  5]   2.00-3.00   sec   113 MBytes   945 Mbits/sec   48   1.03 =
MBytes      =20
> [  5]   3.00-4.00   sec   112 MBytes   941 Mbits/sec   95   52.8 =
KBytes      =20
> [  5]   4.00-5.00   sec   112 MBytes   941 Mbits/sec   95   21.4 =
KBytes      =20
> [  5]   5.00-6.00   sec   112 MBytes   941 Mbits/sec   96   1.04 =
MBytes      =20
> [  5]   6.00-7.00   sec   112 MBytes   941 Mbits/sec   91    148 =
KBytes      =20
> [  5]   7.00-8.00   sec   112 MBytes   941 Mbits/sec   92    388 =
KBytes      =20
> [  5]   8.00-9.00   sec   112 MBytes   941 Mbits/sec   99    792 =
KBytes      =20
> [  5]   9.00-10.00  sec   112 MBytes   941 Mbits/sec   93   1.07 =
MBytes      =20
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.00  sec  1.10 GBytes   943 Mbits/sec  709             =
sender
> [  5]   0.00-10.79  sec  1.10 GBytes   874 Mbits/sec                  =
receiver
>=20
>=20
> Accepted connection from 192.168.1.120, port 24400
> [  5] local 192.168.1.7 port 5201 connected to 192.168.1.120 port =
14839
> [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
> [  5]   0.00-1.00   sec   109 MBytes   914 Mbits/sec   84    668 =
KBytes      =20
> [  5]   1.00-2.00   sec   112 MBytes   942 Mbits/sec  102    942 =
KBytes      =20
> [  5]   2.00-3.00   sec   112 MBytes   942 Mbits/sec  101    603 =
KBytes      =20
> [  5]   3.00-4.00   sec   112 MBytes   941 Mbits/sec   95    868 =
KBytes      =20
> [  5]   4.00-5.00   sec   112 MBytes   941 Mbits/sec   92    135 =
KBytes      =20
> [  5]   5.00-6.00   sec   112 MBytes   942 Mbits/sec   89    989 =
KBytes      =20
> [  5]   6.00-7.00   sec   112 MBytes   941 Mbits/sec   95   28.5 =
KBytes      =20
> [  5]   7.00-8.00   sec   112 MBytes   942 Mbits/sec  100    158 =
KBytes      =20
> [  5]   8.00-9.00   sec   112 MBytes   941 Mbits/sec  102   20.0 =
KBytes      =20
> [  5]   9.00-10.00  sec   112 MBytes   941 Mbits/sec   99    335 =
KBytes      =20
> [  5]  10.00-10.00  sec  7.50 KBytes   525 Mbits/sec    0    344 =
KBytes      =20
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.00  sec  1.09 GBytes   939 Mbits/sec  959             =
sender
>=20
> Accepted connection from 192.168.1.7, port 30451
> [  5] local 192.168.1.120 port 5201 connected to 192.168.1.7 port =
28078
> [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
> [  5]   0.00-1.00   sec  38.8 MBytes   326 Mbits/sec   36   1.61 =
MBytes      =20
> [  5]   1.00-2.01   sec  80.6 MBytes   667 Mbits/sec  471    817 =
KBytes      =20
> [  5]   2.01-3.00   sec   106 MBytes   901 Mbits/sec  114    688 =
KBytes      =20
> [  5]   3.00-4.00   sec   111 MBytes   933 Mbits/sec    0    893 =
KBytes      =20
> [  5]   4.00-5.00   sec   111 MBytes   933 Mbits/sec    2    523 =
KBytes      =20
> [  5]   5.00-6.00   sec   111 MBytes   932 Mbits/sec    0    774 =
KBytes      =20
> [  5]   6.00-7.00   sec   108 MBytes   903 Mbits/sec  361    551 =
KBytes      =20
> [  5]   7.00-8.00   sec  96.3 MBytes   808 Mbits/sec  180    473 =
KBytes      =20
> [  5]   8.00-9.00   sec   111 MBytes   933 Mbits/sec    0    740 =
KBytes      =20
> [  5]   9.00-10.00  sec   111 MBytes   933 Mbits/sec    0    934 =
KBytes      =20
> [  5]  10.00-10.67  sec  74.1 MBytes   933 Mbits/sec    1    456 =
KBytes      =20
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.67  sec  1.03 GBytes   833 Mbits/sec  1165             =
sender
>=20
> Connecting to host 192.168.1.7, port 5201
> [  5] local 192.168.1.120 port 60431 connected to 192.168.1.7 port =
5201
> [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
> [  5]   0.00-1.00   sec  97.8 MBytes   818 Mbits/sec    0    633 =
KBytes      =20
> [  5]   1.00-2.00   sec   111 MBytes   934 Mbits/sec  128    649 =
KBytes      =20
> [  5]   2.00-3.00   sec   112 MBytes   937 Mbits/sec    0    863 =
KBytes      =20
> [  5]   3.00-4.00   sec   111 MBytes   933 Mbits/sec    2    394 =
KBytes      =20
> [  5]   4.00-5.00   sec   111 MBytes   933 Mbits/sec    0    693 =
KBytes      =20
> [  5]   5.00-6.00   sec   111 MBytes   933 Mbits/sec    0    897 =
KBytes      =20
> [  5]   6.00-7.00   sec   111 MBytes   932 Mbits/sec    2    480 =
KBytes      =20
> [  5]   7.00-8.00   sec   111 MBytes   933 Mbits/sec    0    746 =
KBytes      =20
> [  5]   8.00-9.00   sec  62.3 MBytes   523 Mbits/sec  320    436 =
KBytes      =20
> [  5]   9.00-10.00  sec   111 MBytes   934 Mbits/sec    0    717 =
KBytes      =20
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.00  sec  1.03 GBytes   881 Mbits/sec  452             =
sender
> [  5]   0.00-10.01  sec  1.02 GBytes   880 Mbits/sec                  =
receiver
>=20
> I may need to establish a better context or just may be
> limited to Bitrate comparisons instead of looking for
> Retr staying zero.
>=20
> (Still not at a modern non-debug build for the Rock64.)

The Rock64 V2 is now running head -r363021 with a non-debug
kernel and world:

# uname -apKU
FreeBSD Rock64orRPi4 13.0-CURRENT FreeBSD 13.0-CURRENT #5 r363021M: Wed =
Jul  8 20:30:01 PDT 2020     =
markmi@FBSDFHUGE:/usr/obj/cortexA53_clang/arm64.aarch64/usr/src/arm64.aarc=
h64/sys/GENERIC-NODBG  arm64 aarch64 1300100 1300100

The patch for extra messages (and a potential bug
fix) has not been applied.

The iperf3 outputs are below.

# iperf3 -c 192.168.1.120
Connecting to host 192.168.1.120, port 5201
[  5] local 192.168.1.109 port 40422 connected to 192.168.1.120 port =
5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  73.3 MBytes   615 Mbits/sec    0    732 KBytes  =
    =20
[  5]   1.00-2.00   sec  72.7 MBytes   610 Mbits/sec    0    732 KBytes  =
    =20
[  5]   2.00-3.00   sec  72.9 MBytes   612 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   3.00-4.00   sec  72.7 MBytes   610 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   4.00-5.00   sec  72.7 MBytes   610 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   5.00-6.00   sec  72.7 MBytes   610 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   6.00-7.00   sec  72.6 MBytes   609 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   7.00-8.00   sec  72.6 MBytes   609 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   8.00-9.00   sec  72.7 MBytes   609 Mbits/sec    0   1.07 MBytes  =
    =20
[  5]   9.00-10.00  sec  72.7 MBytes   610 Mbits/sec    0   1.07 MBytes  =
    =20
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   727 MBytes   610 Mbits/sec    0             =
sender
[  5]   0.00-10.57  sec   727 MBytes   577 Mbits/sec                  =
receiver

iperf Done.

# iperf3 -R -c 192.168.1.120
Connecting to host 192.168.1.120, port 5201
Reverse mode, remote host 192.168.1.120 is sending
[  5] local 192.168.1.109 port 10711 connected to 192.168.1.120 port =
5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   111 MBytes   932 Mbits/sec                 =20
[  5]   1.00-2.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   2.00-3.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   3.00-4.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   4.00-5.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   5.00-6.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   6.00-7.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   7.00-8.00   sec   111 MBytes   933 Mbits/sec                 =20
[  5]   8.00-9.00   sec   111 MBytes   932 Mbits/sec                 =20
[  5]   9.00-10.00  sec   111 MBytes   933 Mbits/sec                 =20
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.56  sec  1.09 GBytes   885 Mbits/sec  932             =
sender
[  5]   0.00-10.00  sec  1.09 GBytes   933 Mbits/sec                  =
receiver


Where the server-side reported:

# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.109, port 17887
[  5] local 192.168.1.120 port 5201 connected to 192.168.1.109 port =
40422
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  32.1 MBytes   269 Mbits/sec                 =20
[  5]   1.00-2.00   sec  72.7 MBytes   610 Mbits/sec                 =20
[  5]   2.00-3.00   sec  72.7 MBytes   610 Mbits/sec                 =20
[  5]   3.00-4.00   sec  72.5 MBytes   608 Mbits/sec                 =20
[  5]   4.00-5.00   sec  72.7 MBytes   610 Mbits/sec                 =20
[  5]   5.00-6.00   sec  72.6 MBytes   609 Mbits/sec                 =20
[  5]   6.00-7.00   sec  72.6 MBytes   609 Mbits/sec                 =20
[  5]   7.00-8.00   sec  72.6 MBytes   609 Mbits/sec                 =20
[  5]   8.00-9.00   sec  72.6 MBytes   609 Mbits/sec                 =20
[  5]   9.00-10.00  sec  72.7 MBytes   610 Mbits/sec                 =20
[  5]  10.00-10.57  sec  41.3 MBytes   610 Mbits/sec                 =20
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.57  sec   727 MBytes   577 Mbits/sec                  =
receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.109, port 45095
[  5] local 192.168.1.120 port 5201 connected to 192.168.1.109 port =
10711
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  50.3 MBytes   422 Mbits/sec   36    375 KBytes  =
    =20
[  5]   1.00-2.00   sec   111 MBytes   933 Mbits/sec   95   1.61 MBytes  =
    =20
[  5]   2.00-3.00   sec   111 MBytes   933 Mbits/sec   92    265 KBytes  =
    =20
[  5]   3.00-4.00   sec   111 MBytes   932 Mbits/sec   95    342 KBytes  =
    =20
[  5]   4.00-5.00   sec   111 MBytes   934 Mbits/sec   95   1.01 MBytes  =
    =20
[  5]   5.00-6.00   sec   111 MBytes   933 Mbits/sec   93    471 KBytes  =
    =20
[  5]   6.00-7.00   sec   111 MBytes   933 Mbits/sec   96   1.10 MBytes  =
    =20
[  5]   7.00-8.00   sec   111 MBytes   933 Mbits/sec  100    656 KBytes  =
    =20
[  5]   8.00-9.00   sec   111 MBytes   933 Mbits/sec   86    676 KBytes  =
    =20
[  5]   9.00-10.00  sec   111 MBytes   932 Mbits/sec   91   1.08 MBytes  =
    =20
[  5]  10.00-10.56  sec  62.6 MBytes   933 Mbits/sec   53    696 KBytes  =
    =20
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.56  sec  1.09 GBytes   885 Mbits/sec  932             =
sender
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------


Side note for a networking problem one can
run into on the Rock64 . . .

I'll note that the kernel for the Rock64 still leaks
mbuf_clusters during network activity, not freeing
most of them:

vm.uma.mbuf_cluster.stats.xdomain: 0
vm.uma.mbuf_cluster.stats.fails: 0
vm.uma.mbuf_cluster.stats.frees: 0
vm.uma.mbuf_cluster.stats.allocs: 3302
vm.uma.mbuf_cluster.stats.current: 3302
. . .
vm.uma.mbuf_cluster.limit.max_items: 84417
vm.uma.mbuf_cluster.limit.items: 3302

Copying an about 4 GiByte tar to the Rock64
uses up a large portion of the 84417
max_items : vm.uma.mbuf_cluster.stats.current
ends up being rather large and
vm.uma.mbuf_cluster.stats.frees ends up being
rather small.


=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)




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