[Intel-gfx] [PATCH i-g-t v2] test/gem_mocs_settings: Testing MOCS register settings

[Chris Wilson]

On Mon, Apr 11, 2016 at 01:50:16PM +0100, Peter Antoine wrote:
> On Fri, 8 Apr 2016, Chris Wilson wrote:
> >>+	execbuf.flags = I915_EXEC_SECURE | engine_id;
> >>+
> >>+	gem_execbuf(fd, &execbuf);
> >>+	gem_sync(fd, handle);
> >
> >       ^ Papering over a bug in your code.
> >
> >Hint: did you tell anyone that you were writing into the buffer?
> Ok a write_domain and gem_wait.

gem_wait isn't required, the order is enforced by gem_execbuf followed
by gem_read or subsequent gem_set_domain (if using mmap interface).
The API is geared towards explicit domain management.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre