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RE: [perfsonar-user] bwctl speed questions


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  • From: "Koch, Brian" <>
  • To: "" <>
  • Cc: "" <>
  • Subject: RE: [perfsonar-user] bwctl speed questions
  • Date: Fri, 2 May 2014 21:01:17 +0000
  • Accept-language: en-US

Well, if I manually run 4 parallel streams, it goes up to 3.7Gbps. What can I
do to the regular tests though to exercise this better?

-----Original Message-----
From: Brian Tierney
[mailto:]

Sent: Friday, May 02, 2014 3:35 PM
Cc: Koch, Brian;

Subject: Re: [perfsonar-user] bwctl speed questions

Brian: What latency is the path you are testing? Does owamp show any packet
loss on that path?

Try doing a test with iperf3, which will give you TCP retransmit count.

bwctl -c hostname -I iperf3 -i1 -fm -x -t20




On Fri, May 2, 2014 at 7:47 AM, Aaron Brown
<>
wrote:
> Hey Brian,
>
> Unfortunately, there’s not a way to do multiple streams currently. The idea
> was to show how single stream performance looked since any network can be
> made to look good with enough streams :) The next version of the Toolkit
> should include the ability to configure number of streams, however.
>
> Cheers,
> Aaron
>
> On May 2, 2014, at 10:04 AM,
>
> wrote:
>
>> Is there a way to run multiple data streams? I'm not sure why the
>> data path is fully tested.
>> Connections:
>> Perfsonar --> core router (10G)
>> core router --> firewall (10G) (fw throughput = 2G) firewall -->
>> outside WAN router (10G) outside WAN router --> perfsonar (10G)
>>
>> Theoretically, I should be seeing close to 2Gbps on my bwctl graphs,
>> but graphs are barely showing over 1Gbps.
>>
>> Are there some settings I need to tweak? I'm a little new to this.
>



--
Brian Tierney, http://www.es.net/tierney

Energy Sciences Network (ESnet), Berkeley National Lab

http://fasterdata.es.net



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