[Bug 1001344] Allow nc_test_slave for lwIP to compile for targets with 128KiB RAM.

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--- Comment #16 from Sergei Gavrikov <sergei.gavrikov@gmail.com> 2012-05-14 21:36:05 BST ---
(In reply to comment #15)
> (In reply to comment #14)
> > Here I am again after long time. It seem that buffers were too short
> > 8KiB and messages can be up to 10KiB. Now I fixed this and it is
> > stable. Unfortunately I can't test on synthetic target since newer
> > Linux kernel (3) doesn't seem to support ethertap (any suggestion?).
> > Sergei do u have some time to test on synthetic target pse?
> >
> > Note: The same bug with MAX_BUF seem to be present in BSD test too.
> > I'm going to open a bug for that.

[snip]

> I will test your newest patch on synthetic target for 2.6.32 kernel

Ilija, I have tested nc_test_{master,slave} for synthetic target and NET
template (all NC tests passed as I could expect). The eCos settings were

  cdl_configuration eCos {
      template    net ;
  };
  cdl_option CYGPKG_NET_BUILD_HW_TESTS {
      user_value 1
  };

Hm, not patched lwip' NC test (slave) on synthetic target stalled when
background load is 30% (for BSD stack all loads passed on eCos synthetic
target)

  Set background load = 30%
  Request 18 from 192.168.1.1:7776
  UDP echo - 2048 buffers, 1024 bytes
  Packets out of sequence - recvd: 1, expected: 0

And patched one for 20% load (no 'Segmentation fault' anymore)

  Set background load = 20% 
  Request 18 from 192.168.1.1:7776 
  UDP echo - 2048 buffers, 1024 bytes 
  Packets out of sequence - recvd: 1, expected: 0

So, it seems to me it is another issue with test itself. It would be
good to know, All the lwIP NC tests/loads passed on your real hardware?
For reference,  I used the next eCos configs to build both lwIP' tests

  cdl_configuration eCos {
      template    lwip_eth ;
  };
  cdl_option CYGVAR_DEVS_ETH_ECOSYNTH_ETH0 {
      user_value 1
  };
  cdl_option CYGFUN_LWIP_MODE_SIMPLE {
      user_value 0
  };
  cdl_option CYGFUN_LWIP_MODE_SEQUENTIAL {
      user_value 1
  };

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