Quoting Chris Wilson (2018-09-27 09:49:39)
> When submitting chains to each engine, we can do so (mostly) in
> parallel, so delegate submission to threads on a per-engine basis.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/selftests/intel_lrc.c | 71 ++++++++++++++++++----
> 1 file changed, 59 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/selftests/intel_lrc.c b/drivers/gpu/drm/i915/selftests/intel_lrc.c
> index 3a474bb64c05..2ab142c9d9c2 100644
> --- a/drivers/gpu/drm/i915/selftests/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/selftests/intel_lrc.c
> @@ -587,8 +587,10 @@ static int random_priority(struct rnd_state *rnd)
> struct preempt_smoke {
> struct drm_i915_private *i915;
> struct i915_gem_context **contexts;
> + struct intel_engine_cs *engine;
> unsigned int ncontext;
> struct rnd_state prng;
> + unsigned long count;
> };
>
> static struct i915_gem_context *smoke_context(struct preempt_smoke *smoke)
> @@ -597,31 +599,76 @@ static struct i915_gem_context *smoke_context(struct preempt_smoke *smoke)
> &smoke->prng)];
> }
>
> +static int smoke_crescendo_thread(void *arg)
> +{
> + struct preempt_smoke *smoke = arg;
> + IGT_TIMEOUT(end_time);
> + unsigned long count;
> +
> + count = 0;
> + do {
> + struct i915_gem_context *ctx = smoke_context(smoke);
> + struct i915_request *rq;
> +
> + ctx->sched.priority = count % I915_PRIORITY_MAX;
> +
> + mutex_lock(&smoke->i915->drm.struct_mutex);
Shared ctx, I should move the priority under the lock.
-Chris
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