On Thu, Mar 12, 2015 at 11:11:17AM +0000, Chris Wilson wrote: > This provides a nice boost to mesa in swap bound scenarios (as mesa > throttles itself to the previous frame and given the scenario that will > complete shortly). It will also provide a good boost to systems running > with semaphores disabled and so frequently waiting on the GPU as it > switches rings. In the most favourable of microbenchmarks, this can > increase performance by around 15% - though in practice improvements > will be marginal and rarely noticeable. > > v2: Account for user timeouts > v3: Limit the spinning to a single jiffie (~1us) at most. On an > otherwise idle system, there is no scheduler contention and so without a > limit we would spin until the GPU is ready. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> I'm really happy with this tradeoff. Can we throw this to the vultures to see if anyone notices? -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
