Re: [lwip-users] Throughput benchmark question - nasty pauses

[Dave Nadler]

I figured out how to get the wireshark trace,
but how to get the wireshark GUI to output the summary below in text baffles me, hope the pic is OK:

Everything is going swimmingly until 4316.
I don't understand the meaning of "previous segment not captured" here - something got dropped.
And then it takes a second to get going again.

Any pointers appreciated!
Thanks,
Best Regards, Dave

On 2/20/2019 1:45 AM, Johan Borkhuis wrote:

Dave,

First thing would be to sniff the network using Wireshark, and see what happens there when the traffic pauses.
This would usually give a good indication on what did happen.

Regards,
Johan

On 2019-02-20 00:15, Dave Nadler wrote:

Hi - Newbie here trying to do some basic throughput tests.
LwIP 2.1.2 on FreeRTOS 9, ST32F429, IPv4, TCP.

I want to see how much I can consistently push through the stack.
Made a simple test server (sockets API) which repeatedly outputs
101-character lines.
I access the server via PuTTY raw mode on Winbloze over a local
network.
I can usually send 3 lines per msec for a second (3000 lines in 1
second), but...
Sometimes, I get ~ 1-second pauses (as seen in Putty or TeraTerm).

How should I go about understanding where the pauses come from?

Thanks in advance for any hints,
Best Regards, Dave

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Dave Nadler, USA East Coast voice (978) 263-0097, address@hidden,
Skype
 Dave.Nadler1
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-- 
Dave Nadler, USA East Coast voice (978) 263-0097, address@hidden, Skype 
 Dave.Nadler1