Quoting Tvrtko Ursulin (2018-03-22 11:17:10) > From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > > Pollable spin batch exports a spin->running pointer which can be checked > by dereferencing it to see if the spinner is actually executing on the > GPU. > > This is useful for tests which want to make sure they do not proceed with > their next step whilst the spinner is potentially only being processed by > the driver and not actually executing. > > Pollable spinner can be created with igt_spin_batch_new_poll or > __igt_spin_batch_new_poll, after which a loop similar to: > > while (!*(volatile bool *)spin->running) > ; Let's actually make READ_ONCE() a common thing and make this a convenient igt_spin_busywait_until_running() (igt_spin_spin)? > Can be used to wait until the spinner start execution. > > Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
