Hi Bob,
funny, that is a feature we wanted recently for cake-autorate (not for the
controller but for hypothesis testing of what funny things might happen over
LTE). Our "poor man's" version was ICMP echo requests against 8.8.8.8 as google
accepts large echo requests, but only sends "truncated" replys....
Have a real tool like iperf2 allow to request the size per direction directly
is much better (well, it leaves the challenge of getting one's own iperf2
server up somewhee accessible on the internet).
Regards
Sebastian
> On May 12, 2023, at 17:46, rjmcmahon via Rpm <[email protected]>
> wrote:
>
> Hi All,
>
> I received a recent diff for iperf 2 to support independent request and reply
> sizes for the bounceback test. It's nice to get diffs that can be patched in!
>
> [root@ctrl1fc35 ~]# iperf -c 192.168.1.231 --bounceback --bounceback-reply
> 512K
> ------------------------------------------------------------
> Client connecting to 192.168.1.231, TCP port 5001 with pid 305401 (1 flows)
> Bounceback test (req/reply size = 100 Byte/ 512 KByte) (server hold req=0
> usecs & tcp_quickack)
> Bursting request 10 times every 1.00 second(s)
> TCP congestion control using reno
> TOS set to 0x0 and nodelay (Nagle off)
> TCP window size: 85.0 KByte (default)
> ------------------------------------------------------------
> [ 1] local 192.168.1.15%enp2s0 port 42800 connected with 192.168.1.231 port
> 5001 (bb w/quickack len/hold=100/0) (sock=3) (icwnd/mss/irtt=14/1448/3302)
> (ct=3.36 ms) on 2023-05-12 08:36:57.163 (PDT)
> [ ID] Interval Transfer Bandwidth BB cnt=avg/min/max/stdev
> Rtry Cwnd/RTT RPS(avg)
> [ 1] 0.00-1.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=10.924/7.497/27.463/5.971 ms 0 14K/3992 us 92 rps
> [ 1] 1.00-2.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=10.068/7.274/21.120/3.963 ms 0 14K/4307 us 99 rps
> [ 1] 2.00-3.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.674/8.148/17.413/2.798 ms 0 14K/4243 us 103 rps
> [ 1] 3.00-4.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.858/7.587/20.889/3.961 ms 0 14K/4474 us 101 rps
> [ 1] 4.00-5.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.872/7.558/17.720/2.842 ms 0 14K/4692 us 101 rps
> [ 1] 5.00-6.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.649/6.844/18.537/3.205 ms 0 14K/4301 us 104 rps
> [ 1] 6.00-7.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.502/7.083/19.839/3.697 ms 0 14K/4153 us 105 rps
> [ 1] 7.00-8.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=9.965/7.747/22.194/4.350 ms 0 14K/4357 us 100 rps
> [ 1] 8.00-9.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=10.072/7.936/20.307/3.730 ms 0 14K/4442 us 99 rps
> [ 1] 9.00-10.00 sec 5.00 MBytes 42.0 Mbits/sec
> 10=10.031/8.109/19.907/3.551 ms 0 14K/4086 us 100 rps
> [ 1] 0.00-10.02 sec 50.0 MBytes 41.9 Mbits/sec
> 100=9.962/6.844/27.463/3.740 ms 0 14K/4152 us 100 rps
> [ 1] 0.00-10.02 sec BB8(f)-PDF:
> bin(w=100us):cnt(100)=69:1,71:1,73:1,75:1,76:3,77:1,78:2,79:3,80:3,81:1,82:6,83:7,84:1,85:3,86:4,87:4,88:4,89:5,90:7,91:3,92:4,93:2,95:8,96:3,97:1,98:1,99:1,101:3,102:1,103:1,104:1,106:2,123:1,175:1,178:1,186:1,199:1,200:1,204:1,209:1,212:1,222:1,275:1
> (5.00/95.00/99.7%=76/204/275,Outliers=1,obl/obu=0/0)
>
> Bob
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