As signals cause the syscalls to be interrupted, we often need to clean
up partial state before returning to userspace. Often a source of
unamusing bugs, so encourage gem_stress to provoke them.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
gem_stress -p1 is much more evil than gem_stress -c1, it also manages
to tear appart untiled workloads!
Now duct-taping over it still works (--apply-duct-tape) ... hm.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Remember the 3D pipeline is much more restricted than the BLT engine,
and we were feeding it buffers much larger than either the
render engine or the sampler could manager.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This things just won't die (libva!!!), so add an option to test them.
_Not_ meant to test snoopable mappings.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This seems to be another trick to massively improve correctness
of the render blit. At least on my i945.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Of all the things I've tried, this seems to be the only thing
to fix tile corruptions reliably on gen2&gen3 (safe for outright
disabling the render copy).
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
