Re: [Iperf-users] iPerf Window size

[Kaliaperumal, Rajesh]

Thanks Bob. I will run some tests using iperf2.0.11 with the -e and –vary-load 
option.

I am trying to understand the impact on TCP performance with variation of 
window size.

Thanks and regards,
Rajesh K


From: Bob McMahon 
Date: Friday, May 25, 2018 at 1:54 PM
To: "Kaliaperumal, Rajesh" 
Cc: iPerf User Group 
Subject: Re: iPerf Window size

Here is a good starting link:  
https://fasterdata.es.net/host-tuning/linux/

Speaking for iperf2, the -w window size sets the socket buffer size.

There has been a lot of effort to reduce the windows per the buffer bloat 
problem.

What exactly are you trying to influence with TCP by adjusting the window sizes?

If you use iperf 
2.0.11
 with -e and --vary-load you can get an idea how the congestion window and the 
RTT are responding per the TCP offered load.

Bob


On Fri, May 25, 2018 at 1:39 PM, Kaliaperumal, Rajesh 
> wrote:
Hi all,
  Can anyone explain or point me to some documentation that explains 
how iPerf3 and iPerf2 handles the window size parameter?

I am trying to understand how to use this attribute for influencing the TCP 
performance.

Thanks and regards,
Rajesh K



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[Iperf-users] iPerf Window size

[Kaliaperumal, Rajesh]

Hi all,
  Can anyone explain or point me to some documentation that explains 
how iPerf3 and iPerf2 handles the window size parameter?

I am trying to understand how to use this attribute for influencing the TCP 
performance.

Thanks and regards,
Rajesh K


--
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engaging tech sites, Slashdot.org! http://sdm.link/slashdot___
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Re: [Iperf-users] iPerf Window size

[Bob McMahon via Iperf-users]

Here is a good starting link:  https://fasterdata.es.net/host-tuning/linux/

Speaking for iperf2, the -w window size sets the socket buffer size.

There has been a lot of effort to reduce the windows per the buffer bloat
problem .

What exactly are you trying to influence with TCP by adjusting the window
sizes?

If you use iperf 2.0.11  with -e
and --vary-load you can get an idea how the congestion window and the RTT
are responding per the TCP offered load.

Bob



On Fri, May 25, 2018 at 1:39 PM, Kaliaperumal, Rajesh <
rajesh.kaliaperu...@arris.com> wrote:

> Hi all,
>
>   Can anyone explain or point me to some documentation that
> explains how iPerf3 and iPerf2 handles the window size parameter?
>
>
>
> I am trying to understand how to use this attribute for influencing the
> TCP performance.
>
>
>
> Thanks and regards,
>
> Rajesh K
>
>
>
>
>
--
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