lockup problems, altera nios2 web server demo

Hi Everybody -

We have been working on a project using nios2/lwip/ucosii.

Development is taking place on a cyclone eval board, and we

are now using the "release" version of the nios 2 development

system.

We wrote some a test code for use with the "out of the box" untouched

web server application. The code repeatedly hits the nios board with

http get requests.

We are seeing:

(1) there is an occasional pause which occurs when the test code

is trying to connect. This pause occurs typically once out of a series

of 20-200 accesses and lasts for about a second or two before

resuming. During the pauses, the system nios board continues to

respond properly to ping requests. It is suspected that there are some

old connections left laying around, and when a limit is reached, a delay

is caused until a connection frees up. This behaviour is a bit strange,

but not fatal.

(2) More troubling, after typically about 500-25000 accesses, the board

consistently locks up. At this point, the board seems totally dead, and

does not respond to pings.

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Has anyone experienced anything similar?

The code to do the repeated http requests (a linux/unix application) is here:

http://phntm.com/nios/hammer.tgz (http://phntm.com/nios/hammer.tgz)

The command used was:

hammer 172.25.1.81 80 index.html 1000000 10000

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