[dpdk-dev] [PATCH] app/test: reduced duration of red_autotest

[Thomas Monjalon]

2016-06-08 15:56, Kantecki, Tomasz:
> Hi Thomas,
>  
> > > 12s is long for a functional test. We are used to have tests of less than 1s.
> > > Do you think this magnitude order can be achieved for red tests?
> > 
> > This is a real challenge :) Let me take another look into it.
> 
> I had a 2nd look into this test suite and reducing time for functional tests is doable but labor intensive. Let me explain:
> RED/WRED algorithm is time based (packet queue events in time). For tracking time the test uses TSC (x86 time stamp counter). This could be replaced with some fake time stamp in functional tests and result in significant reduction of execution time. It needs couple of days to carefully replace TSC with a fake time stamp solution without breaking test logic.

Sorry, I haven't dived into the code, but I don't understand how we get
some seconds delays in a code for fast processing on nano-second CPU.
Are you sure you cannot have the same result with less iterations and
shorter timeouts?