igt/gem_sync: Extend with store synchronisation
Currently gem_sync exploits read-read optimisation to wait upon multiple
rings simultaneously. But at the moment, gem_exec_flush is showing
sporadic missed interrupts on bdw/skl and yet gem_sync is not. This is
some subtlety in the timing, perhaps caused by the extra write. This set
of tests tries to exercise that by using a write batch - which also
means we exercise inter-ring synchronisation (like gem_storedw_loop).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed