The test relies on having to wait upon the GPU at some point and so
simulating a missed interrupt. If there is insufficient load on the GPU,
we can complete the task before we even wait.
References: https://bugs.freedesktop.org/show_bug.cgi?id=71334
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Just launching empty batches isn't enough load on my speedy g33
to force the kernel to enable interrupts an wait for them.
So use some real load. With that the test is now fully reliably on
my g33 amchine.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
