sorry for being unclear there. Perhaps I got the terminology wrong but I
meant a periodic stream of udp bytes. Say if we have a UDP datagram size of
1KB. Say I would like to send at 1MBps. Then I would want a UDP datagram
every 1ms.( In other words I don't want a bursty flow but rather a uniform
stream of traffic).Is that possible with iperf?
On Sunday, May 27, 2018, Bob McMahon <bob.mcma...@broadcom.com> wrote:
> 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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>>>>
>>>>
>>>
>>
>>
>
--
Regards,
Ashish Kashinath
UIUC|UCSD|Intel Corp.
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