[Intel-gfx] [PATCH v6] igt/gem_trtt: Exercise the TRTT hardware

[Chris Wilson]

On Fri, Mar 18, 2016 at 09:19:35PM +0530, Goel, Akash wrote:
> On 3/18/2016 4:02 PM, Chris Wilson wrote:
> >The point about looping is to try and ensure that every possible code
> >path is interrupted (since we only interrupt every 2us and the code paths
> >tend to be shorter than than!).
> 
> Thanks, will follow the gem_softpin.c example.
> 
> I hope you meant 2ms here & not 2us, since the signal_helper_process
> is sending signals at the ~500 Hz rate.

Yeah, failed hopeless. Though I thought it was a 5000Hz rate. Any way
the point is that the chance of a signal interrupting a critical path
anywhere other than at a wait is small, and so we want to repeat the
test a few times to increase our chances.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre