[igt-dev] [PATCH] i915/gem_spin_batch: Add test to execute in parallel on all engines

[Chris Wilson]

Quoting Vanshidhar Konda (2019-10-31 18:53:07)
> On Thu, Oct 31, 2019 at 06:17:28PM +0000, Chris Wilson wrote:
> >Quoting Vanshidhar Konda (2019-10-31 18:01:59)
> >> Add a test that submits batch buffers to all engines and executes them
> >> in parallel; either from the same context or from new contexts for each
> >> engine.
> >
> >Duplicating a test for what purpose? Pedagogy?
> 
> It would be great if you could point out which test this duplicates.
> I've been looking for a test that proves a batch buffer is executing in
> parallel on all engines. Others I spoke to couldn't point out a test.

There are quite a few, depending on just how you want to go about
proving execution. The focus for gem_spin_batch is demonstrating that
the igt_spin_t API works as advertised, not the uABI per se.

So what's your primary focus here? Demonstrating how to use igt_spin_t,
verifying that we can schedule parallel engines, that we can specify
parallel set of engines, we report parallel activity or that the HW
behaves in a certain way?
-Chris