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drm/i915/selftests: Split preemption smoke test into threads

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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@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-10-01 13:32:01 +01:00
parent 7769db5883
commit 992d2098ef
1 changed files with 66 additions and 17 deletions
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65
drivers/gpu/drm/i915/selftests/intel_lrc.c
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@ -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)
@ -597,30 +599,77 @@ static struct i915_gem_context *smoke_context(struct preempt_smoke *smoke)
&smoke->prng)];
}
static int smoke_crescendo(struct preempt_smoke *smoke)
static int smoke_crescendo_thread(void *arg)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct preempt_smoke *smoke = arg;
IGT_TIMEOUT(end_time);
unsigned long count;
count = 0;
for_each_engine(engine, smoke->i915, id) {
IGT_TIMEOUT(end_time);
do {
struct i915_gem_context *ctx = smoke_context(smoke);
struct i915_request *rq;
mutex_lock(&smoke->i915->drm.struct_mutex);
ctx->sched.priority = count % I915_PRIORITY_MAX;
rq = i915_request_alloc(engine, ctx);
if (IS_ERR(rq))
rq = i915_request_alloc(smoke->engine, ctx);
if (IS_ERR(rq)) {
mutex_unlock(&smoke->i915->drm.struct_mutex);
return PTR_ERR(rq);
}
i915_request_add(rq);
mutex_unlock(&smoke->i915->drm.struct_mutex);
count++;
} while (!__igt_timeout(end_time, NULL));
smoke->count = count;
return 0;
}
static int smoke_crescendo(struct preempt_smoke *smoke)
{
struct task_struct *tsk[I915_NUM_ENGINES] = {};
struct preempt_smoke arg[I915_NUM_ENGINES];
struct intel_engine_cs *engine;
enum intel_engine_id id;
unsigned long count;
int err = 0;
mutex_unlock(&smoke->i915->drm.struct_mutex);
for_each_engine(engine, smoke->i915, id) {
arg[id] = *smoke;
arg[id].engine = engine;
arg[id].count = 0;
tsk[id] = kthread_run(smoke_crescendo_thread, &arg,
"igt/smoke:%d", id);
if (IS_ERR(tsk[id])) {
err = PTR_ERR(tsk[id]);
break;
}
}
count = 0;
for_each_engine(engine, smoke->i915, id) {
int status;
if (IS_ERR_OR_NULL(tsk[id]))
continue;
status = kthread_stop(tsk[id]);
if (status && !err)
err = status;
count += arg[id].count;
}
mutex_lock(&smoke->i915->drm.struct_mutex);
pr_info("Submitted %lu crescendo requests across %d engines and %d contexts\n",
count, INTEL_INFO(smoke->i915)->num_rings, smoke->ncontext);