I'm not sure what is meant by "synchronous instead of isochronous."
Bob
On Sat, May 26, 2018 at 12:25 AM, Ashish Kashinath <akash...@eng.ucsd.edu>
wrote:
> Thanks for this! Is there a way to generate synchronous udp traffic
> instead of it being isochronous?
>
> Regards,
>
> On Thu, May 24, 2018 at 8:08 PM, Bob McMahon <bob.mcma...@broadcom.com>
> wrote:
>
>> Not sure on iperf3.
>>
>> iperf 2.0.11 <https://sourceforge.net/projects/iperf2/?source=navbar>
>> supports isochronous traffic to better emulate things like video streams
>> and will burst packets. It requires ./configure --enable-isochronous
>> before make.
>>
>> The client command line option is --isochronous=<n fps>:<mean>,<variance>
>> and optionally --ipg <n milliseconds> (defaults to 5 us)
>>
>> A way to send a burst every 1/60 seconds is something like
>> --isochronous=60:20m,0
>>
>> [root@localhost iperf2-code]# iperf -c 192.168.1.4 -u -i 1 -e
>> --isochronous=60:20m,0
>> ------------------------------------------------------------
>> Client connecting to 192.168.1.4, UDP port 5001 with pid 25669
>> UDP isochronous: 60 frames/sec mean=20.0 Mbit/s, variance=0.00 bit/s,
>> Period/IPG=16.67/0.005 ms
>> UDP buffer size: 208 KByte (default)
>> ------------------------------------------------------------
>> [ 3] local 192.168.1.1 port 49458 connected with 192.168.1.4 port 5001
>> [ ID] Interval Transfer Bandwidth Write/Err PPS
>> frames:tx/missed/slips
>> [ 3] 0.00-1.00 sec 2.39 MBytes 20.0 Mbits/sec 1741/0 1741 pps
>> 60/0/0
>> [ 3] 1.00-2.00 sec 2.38 MBytes 20.0 Mbits/sec 1740/0 1740 pps
>> 60/0/0
>> [ 3] 2.00-3.00 sec 2.39 MBytes 20.0 Mbits/sec 1741/0 1741 pps
>> 60/0/0
>> [ 3] 3.00-4.00 sec 2.39 MBytes 20.0 Mbits/sec 1741/0 1741 pps
>> 60/0/0
>> [ 3] 4.00-5.00 sec 2.38 MBytes 20.0 Mbits/sec 1740/0 1740 pps
>> 60/0/0
>> [ 3] 5.00-6.00 sec 2.39 MBytes 20.0 Mbits/sec 1744/0 1744 pps
>> 60/0/0
>> [ 3] 6.00-7.00 sec 2.42 MBytes 20.3 Mbits/sec 1763/0 1734 pps
>> 61/0/0
>> [ 3] 7.00-8.00 sec 2.38 MBytes 20.0 Mbits/sec 1740/0 1740 pps
>> 60/0/0
>> [ 3] 8.00-9.00 sec 2.38 MBytes 20.0 Mbits/sec 1740/0 1740 pps
>> 60/0/0
>> [ 3] 0.00-10.02 sec 23.9 MBytes 20.0 Mbits/sec 17429/0 1740 pps
>> 600/0/0
>> [ 3] Sent 17429 datagrams
>> [ 3] Server Report:
>> [ 3] 0.0-10.0 sec 23.9 MBytes 20.0 Mbits/sec 62.411 ms 0/17429
>> (0%)
>>
>> Bob
>>
>> On Thu, May 24, 2018 at 3:02 PM, Ashish Kashinath <akash...@eng.ucsd.edu>
>> wrote:
>>
>>> Hi iperf-users. I am trying to use iperf to generate periodic stream of
>>> packets.
>>>
>>> Presently, I am using the command:
>>>
>>> iperf3 -c 192.168.1.60 -u -i 1 -b 750M -l 1K -t 600 to generate traffic
>>> of bandwidth 750Mb per second for 600 seconds.
>>>
>>> I am enabling UDP mode with a flag of -u and using a datagram size of
>>> 1KB using -l switch.
>>>
>>> Would this work in burst mode or would it generate a periodic stream of
>>> packets?
>>>
>>> --
>>> Regards,
>>> Ashish Kashinath
>>>
>>> ------------------------------------------------------------
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>>
>
>
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