[Intel-gfx] [PATCH i-g-t v6] benchmarks/gem_wsim: Command submission workload simulator

[Chris Wilson]

On Tue, Apr 25, 2017 at 01:25:48PM +0100, Chris Wilson wrote:
> On Tue, Apr 25, 2017 at 01:10:34PM +0100, Tvrtko Ursulin wrote:
> > 
> > On 25/04/2017 12:35, Chris Wilson wrote:
> > >On Tue, Apr 25, 2017 at 12:13:04PM +0100, Tvrtko Ursulin wrote:
> > >>From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> [snip]
> > >>+static enum intel_engine_id
> > >>+rt_balance(const struct workload_balancer *balancer,
> > >>+	   struct workload *wrk, struct w_step *w)
> > >>+{
> > >>+	enum intel_engine_id engine;
> > >>+	long qd[NUM_ENGINES];
> > >>+	unsigned int n;
> > >>+
> > >>+	igt_assert(w->engine == VCS);
> > >>+
> > >>+	/* Estimate the "speed" of the most recent batch
> > >>+	 *    (finish time - submit time)
> > >>+	 * and use that as an approximate for the total remaining time for
> > >>+	 * all batches on that engine. We try to keep the total remaining
> > >>+	 * balanced between the engines.
> > >>+	 */
> > >
> > >Next steps for this would be to move from an instantaneous speed, to an
> > >average. I'm thinking something like a exponential decay moving average
> > >just to make the estimation more robust.
> > 
> > Do you think it would be OK to merge these two tools at this point
> > and continue improving them in place?
> 
> Yes. Although there's no excuse no to make this NO_RELOC from the start,
> especially if we want to demonstrate how it should be done! Hopefully
> attached the delta.

Which I forgot. Let's try again...
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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