Re: [Rpm] [Iperf-users] iperf 2 responsiveness test in 2.1.8-rc, --bounceback option

[Bob McMahon <bob.mcmahon@broadcom.com>]

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Both iperf2 and iperf3 are end to end tools so they're above the network
so-to-speak. If the iperf3 is working as shown, not sure I understand the
question.

I do think engineers testing networks have to look at both responsiveness
(speed) and throughput (capacity/time.)  We've done a lot of work in iperf
2 around responsiveness and latency. Probably a good idea to perform this
class of testing too.

Bob

On Tue, Aug 16, 2022 at 1:02 PM SHARRAH, LOWELL E <ls3129@att.com> wrote:

> Can anyone tell me if iperf3 is designed to be used with cellular
> technology and if so what command should I be running.  I’ve been running
> these two commands for ethernet and getting great results.
>
>
>
> *iperf3 -c xxx.xxx.xxx.xxx -i 2 -t 20 -w 230K -P 3 *
>
> *iperf3 -c xxx.xxx.xxx.xxx -i 2 -t 20 -w 230K -P 3 -R*
>
>
>
>
>
>
>
> *LOWELL E. SHARRAH*
>
> *Professional-Network Support*
>
> *Service Experience & Operations*
>
> *221 N Washington Sq. Lansing, MI 48933 *
>
> *O: (517) 281-1443*
>
> *ls3129@att.com <ls3129@att.com>*
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> *From:* Bob McMahon via Iperf-users <iperf-users@lists.sourceforge.net>
> *Sent:* Sunday, August 07, 2022 12:31 AM
> *To:* iPerf User Group <iperf-users@lists.sourceforge.net>
> *Cc:* Rpm <rpm@lists.bufferbloat.net>
> *Subject:* [Iperf-users] iperf 2 responsiveness test in 2.1.8-rc,
> --bounceback option
>
>
>
> Hi All,
>
> I've added a low impact, low duty cycle responsiveness test to iperf 2.  Man
> page is here. <https://iperf2.sourceforge.io/iperf-manpage.html>
>
> [rjmcmahon@bobcat iperf2-code]$ iperf -v
> iperf version 2.1.8-rc (6 August 2022) pthreads
>
> [rjmcmahon@bobcat iperf2-code]$ iperf -s --permit-key=mytest  -P 1
> --hide-ips
> ------------------------------------------------------------
> Server listening on TCP port 5001
> TCP window size:  128 KByte (default)
> Permit key is 'mytest' (timeout in 20.0 seconds)
> ------------------------------------------------------------
>
> [rjmcmahon@ryzen3950 iperf2-code]$ iperf -c hostname -i 1 --bounceback
> --permit-key=mytest --hide-ips
> ------------------------------------------------------------
> Client connecting to (**hidden**), TCP port 5001
> Bursting:  100 Byte writes 10 times every 1.00 second(s)
> Bounce-back test (size= 100 Byte) (server hold req=0 usecs)
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [mytest(1)] local *.*.*.96 port 38048 connected with *.*.*.123 port 5001
> (bb len/hold=100/0) (icwnd/mss/irtt=14/1448/15038)
> [ ID] Interval        Transfer    Bandwidth         BB
> cnt=avg/min/max/stdev         Rtry  Cwnd/RTT    RPS
> [mytest(1)] 0.00-1.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.333/9.247/15.596/2.493 ms    0   14K/11667 us    88 rps
> [mytest(1)] 1.00-2.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=10.164/9.340/13.791/1.417 ms    0   14K/10374 us    98 rps
> [mytest(1)] 2.00-3.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.301/9.321/14.310/2.010 ms    0   14K/10796 us    88 rps
> [mytest(1)] 3.00-4.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.242/9.432/14.401/2.128 ms    0   14K/10720 us    88 rps
> [mytest(1)] 4.00-5.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.576/9.558/14.442/2.196 ms    0   14K/10821 us    86 rps
> [mytest(1)] 5.00-6.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.310/9.514/14.615/2.151 ms    0   14K/10806 us    88 rps
> [mytest(1)] 6.00-7.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=10.944/9.310/14.490/2.233 ms    0   14K/10548 us    91 rps
> [mytest(1)] 7.00-8.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.584/9.468/19.286/3.254 ms    0   14K/10794 us    86 rps
> [mytest(1)] 8.00-9.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=10.987/9.378/14.322/2.139 ms    0   14K/10533 us    90 rps
> [mytest(1)] 9.00-10.00 sec  1.95 KBytes  16.0 Kbits/sec
>  10=11.449/9.930/14.722/2.151 ms    0   14K/10832 us    87 rps
> [mytest(1)] 0.00-10.03 sec  19.5 KBytes  15.9 Kbits/sec
>  100=11.189/9.247/19.286/2.190 ms    0   14K/11083 us    89 rps
> [  1] 0.00-10.03 sec BB8(f)-PDF:
> bin(w=100us):cnt(100)=93:1,94:9,95:5,96:11,97:9,98:2,99:5,100:6,101:9,102:3,103:3,104:1,105:1,106:2,107:1,115:1,129:1,130:1,132:1,137:1,138:2,139:3,141:4,142:2,143:4,144:3,145:4,147:2,148:1,156:1,193:1
> (5.00/95.00/99.7%=94/147/193,Outliers=0,obl/obu=0/0)
>
> Bob
>
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