[Intel-gfx] [RFC] tests/gem_ring_sync_copy: reduce memory usage

[Chris Wilson]

On Fri, Nov 28, 2014 at 04:04:14PM +0000, Damien Lespiau wrote:
> On Fri, Nov 28, 2014 at 03:47:01PM +0000, Gore, Tim wrote:
> > N_buffers_load is still used. I am still submitting 1000 buffers to the ring, its just
> > that I use the same buffers over and over (hence the "i % NUM_BUSY_BUFFERS").
> > So I only allocate 32 buffers, and each gets copied 1000/32 times, so the ring is kept
> > busy for as long as previously.
> 
> Ah oops, yes, indeed. Looks good then, pushed, thanks for the patch.

The ring is kept as busy, but the queue depth is drastically reduced
(from N_buffers to 32). Since both numbers are arbitrary, I am not
adverse to the change, but I would feel happier if it was demonstrated
that the new test is still capable of detecting bugs deliberately
introduced into the ring synchronisation code.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre