Re: [lwip-users] Delayed Ack causing problems? Where to call tcp_nagle_disable()?

[FreeRTOS Info]

Hi Simon,


On 09/09/2011 09:39, Simon Goldschmidt wrote:
> FreeRTOS Info <address@hidden> wrote:
>> The simulator is exactly that - it is running the FreeRTOS code, which
>> is normally real time, in a non real time windows environment.  It is
>> simulated in the sense that the only way to get the algorithms to run as
>> expected [..] is to have simulated time move much more slowly that
>> actual time.
> 
> That's OK with me, I only wanted to point out that the httpd does *not* need 
> nagle to be disabled, it's fast with it enabled and doesn't gain anything 
> from disabling it.

Yes - the windows simulator does not really tell me anything about the
timing of the TCP/IP applications, so I didn't recognise there was a
problem when using the simulator.  I only recognised there was a problem
when I moved the code onto a proper platform, which happened to be a
Microblaze.

http://www.freertos.org/Free-RTOS-for-Xilinx-MicroBlaze-on-Spartan-6-FPGA.html

Note the microblaze example does not yet include the command console, so
is only using lwIP with its raw interface.

I can get the hardware out again and retry it with/without nagle, just
in case there was something else in the mix that was causing the
perceived problem.  The source code running on the Microblaze (barring
the command console) is the same as that running in the simulator -
other than the MAC driver, naturally.

---

Regarding the default mbox sizes, there was a definite reason why I had
to change them.  It was so definite I cannot remember off hand exactly
why the change was needed, but removing the new definitions would show
it up again right away.

Regards,
Richard.

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