Re: [lwip-users] LwIP RAW - Simultaneous (full-duplex) communication

[Nenad Pekez]

Hi Simon,

> But it seems irrelevant? 
Yes, it's irrelevant.

> Have you checked the stats if you run out of memory somewhere? 
I have checked them, and there is certainly something wrong. After some 
time, stats for memory seem to overflow, at least that's my impression.

At one point I have this:
MEM HEAP
    avail: 60000
    used: 13C40
    max: 14340
    err: 0

And next print (after 1 second):
 MEM HEAP
    avail: 60000
    used: FFFC6480
    max: FFFC6A80
    err: 5

Sometimes, there is no error at all, just "used" and "max" seem to 
overflow or something.

Also, I noticed that no matter which connection is made first, side 
Zynq->PC is the dominant one. I even tried not to call tcp_output() at 
all, but behavior is the same.

When only PC->Zynq side is active, memory stats don't change at all ( 
used: 240, max: 440), even though high throughput is achieved 
(>900Mb/s). Only when Zynq->PC side is active memory consumption 
increases considerably.

> Actually, I'm too lazy to check out myself what the images contain. 
But not too lazy to write out that many sentences. :) A picture is worth 
a thousand words. I understand your point though :)

Best regards and thanks for helping me out,
Nenad