Quoting Carlos Santa (2019-03-22 23:41:16)
> static int gen8_emit_bb_start(struct i915_request *rq,
> u64 offset, u32 len,
> const unsigned int flags)
> {
> + struct intel_engine_cs *engine = rq->engine;
> + struct i915_gem_context *ctx = rq->gem_context;
> + struct intel_context *ce = intel_context_lookup(ctx, engine);
> u32 *cs;
> + u32 num_dwords;
> + bool enable_watchdog = false;
>
> - cs = intel_ring_begin(rq, 6);
> + /* bb_start only */
> + num_dwords = 6;
> +
> + /* check if watchdog will be required */
> + if (ce->watchdog_threshold != 0) {
> + /* + start_watchdog (6) + stop_watchdog (4) */
> + num_dwords += 10;
> + enable_watchdog = true;
What do you do about the recommendation not to enable the watchdog
across semaphores inside user batches? Is that caveat made clear in the
uAPI docs?
-Chris
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